{
  "spore": "profile",
  "id": "calcium-silicate-board",
  "spore_version": "0.2",
  "family": "oxide-ceramics",
  "name": "Calcium silicate insulation board (Promatect-L)",
  "role": "rigid high-temperature insulation board",
  "category": "thermal-protection",
  "type": "reusable-tiles",
  "summary": "Promatect-L is a medium-density calcium silicate board from Promat for heat protection in dryers, industrial furnaces and ventilation equipment. Its datasheet gives a classification temperature of 500 °C, a bulk density of 450 kg/m3 and a thermal conductivity of 0.08 W/m K at 20 °C. No space flight data for calcium silicate board were found in the sources we hold.",
  "best_for": "Heat-protection panels in dryers, industrial furnaces and ventilation equipment, where a 500 °C classification and low conductivity are needed (Promat datasheet).",
  "weakest_at": "Low bending strength for structural use (3.1 N/mm2), no printed continuous service temperature, and dust when cut.",
  "identity": {
    "formula": "Calcium silicate board: an inorganic board made from siliceous and calcareous raw materials with reinforcing fibres (Promat does not print the PROMATECT-L composition)",
    "designations": [
      {
        "system": "Trade name",
        "code": "PROMATECT-L",
        "note": "printed as PROMATECT®–L",
        "source": "promat-promatect-l",
        "where": "Page 1, product name in the title block"
      }
    ],
    "source": "promat-promatect-l",
    "where": "Page 1, product name and description"
  },
  "tags": {
    "environments": [],
    "stresses": [],
    "applications": [
      "thermal-control",
      "structures"
    ]
  },
  "properties": [
    {
      "benchmark": "classification_temperature",
      "label": "Classification temperature",
      "value": 500,
      "bound": "exact",
      "unit": "°C",
      "scope": "material",
      "conditions": {
        "product": "PROMATECT-L calcium silicate board",
        "note": "classification temperature as printed; no continuous service temperature is printed"
      },
      "method": "Classification temperature row, technical data table (Promat datasheet, 2017-09)",
      "status": "ground",
      "source": "promat-promatect-l",
      "where": "Technical data table, Classification temperature row",
      "source_detail": {
        "title": "PROMATECT-L Technical Data Sheet, calcium silicate boards",
        "id": "Promat data sheet, 2017-09 (copyright Etex NV)",
        "url": "https://media.promat.com/doc_682553_us/original/1850243040/promat-data-sheet--promatect-l-en-us.pdf?market=us",
        "year": 2017,
        "kind": "datasheet",
        "license": "manufacturer datasheet, linked not reproduced"
      }
    },
    {
      "benchmark": "density",
      "label": "Bulk density",
      "value": 450,
      "bound": "exact",
      "unit": "kg/m3",
      "scope": "material",
      "conditions": {
        "product": "PROMATECT-L calcium silicate board"
      },
      "method": "Bulk density row, technical data table (Promat datasheet, 2017-09)",
      "status": "ground",
      "source": "promat-promatect-l",
      "where": "Technical data table, Bulk density row",
      "source_detail": {
        "title": "PROMATECT-L Technical Data Sheet, calcium silicate boards",
        "id": "Promat data sheet, 2017-09 (copyright Etex NV)",
        "url": "https://media.promat.com/doc_682553_us/original/1850243040/promat-data-sheet--promatect-l-en-us.pdf?market=us",
        "year": 2017,
        "kind": "datasheet",
        "license": "manufacturer datasheet, linked not reproduced"
      }
    },
    {
      "benchmark": "compressive_strength",
      "label": "Cold compressive strength",
      "value": 2.4,
      "bound": "exact",
      "unit": "N/mm2",
      "scope": "material",
      "conditions": {
        "product": "PROMATECT-L calcium silicate board",
        "test": "printed as cold compressive strength; no test standard named"
      },
      "method": "Cold compressive strength row, technical data table",
      "status": "ground",
      "source": "promat-promatect-l",
      "where": "Technical data table, Cold compressive strength row",
      "source_detail": {
        "title": "PROMATECT-L Technical Data Sheet, calcium silicate boards",
        "id": "Promat data sheet, 2017-09 (copyright Etex NV)",
        "url": "https://media.promat.com/doc_682553_us/original/1850243040/promat-data-sheet--promatect-l-en-us.pdf?market=us",
        "year": 2017,
        "kind": "datasheet",
        "license": "manufacturer datasheet, linked not reproduced"
      }
    },
    {
      "benchmark": "flexural_strength",
      "label": "Bending strength",
      "value": 3.1,
      "bound": "exact",
      "unit": "N/mm2",
      "scope": "material",
      "conditions": {
        "product": "PROMATECT-L calcium silicate board",
        "test": "printed as bending strength; no test standard named"
      },
      "method": "Bending strength row, technical data table",
      "status": "ground",
      "source": "promat-promatect-l",
      "where": "Technical data table, Bending strength row",
      "source_detail": {
        "title": "PROMATECT-L Technical Data Sheet, calcium silicate boards",
        "id": "Promat data sheet, 2017-09 (copyright Etex NV)",
        "url": "https://media.promat.com/doc_682553_us/original/1850243040/promat-data-sheet--promatect-l-en-us.pdf?market=us",
        "year": 2017,
        "kind": "datasheet",
        "license": "manufacturer datasheet, linked not reproduced"
      }
    },
    {
      "benchmark": "linear_shrinkage",
      "label": "Shrinkage after 12 hours at 500 °C",
      "value": 0.25,
      "bound": "exact",
      "unit": "%",
      "scope": "material",
      "conditions": {
        "temperature": "500 °C",
        "time": "12 hours",
        "product": "PROMATECT-L calcium silicate board"
      },
      "method": "Shrinkage row, technical data table, printed as 500 ºC, 12 h",
      "status": "ground",
      "source": "promat-promatect-l",
      "where": "Technical data table, Shrinkage row",
      "source_detail": {
        "title": "PROMATECT-L Technical Data Sheet, calcium silicate boards",
        "id": "Promat data sheet, 2017-09 (copyright Etex NV)",
        "url": "https://media.promat.com/doc_682553_us/original/1850243040/promat-data-sheet--promatect-l-en-us.pdf?market=us",
        "year": 2017,
        "kind": "datasheet",
        "license": "manufacturer datasheet, linked not reproduced"
      }
    },
    {
      "benchmark": "thermal_conductivity",
      "label": "Thermal conductivity at 20 °C",
      "value": 0.08,
      "bound": "exact",
      "unit": "W/m K",
      "scope": "material",
      "conditions": {
        "temperature": "20 °C",
        "product": "PROMATECT-L calcium silicate board"
      },
      "method": "Thermal conductivity row at 20 ºC, technical data table; test standard not named",
      "status": "ground",
      "source": "promat-promatect-l",
      "where": "Technical data table, Thermal conductivity, 20 ºC row",
      "source_detail": {
        "title": "PROMATECT-L Technical Data Sheet, calcium silicate boards",
        "id": "Promat data sheet, 2017-09 (copyright Etex NV)",
        "url": "https://media.promat.com/doc_682553_us/original/1850243040/promat-data-sheet--promatect-l-en-us.pdf?market=us",
        "year": 2017,
        "kind": "datasheet",
        "license": "manufacturer datasheet, linked not reproduced"
      }
    },
    {
      "benchmark": "thermal_conductivity",
      "label": "Thermal conductivity at 200 °C",
      "value": 0.1,
      "bound": "exact",
      "unit": "W/m K",
      "scope": "material",
      "conditions": {
        "temperature": "200 °C",
        "product": "PROMATECT-L calcium silicate board"
      },
      "method": "Thermal conductivity row at 200 ºC, technical data table; test standard not named",
      "status": "ground",
      "source": "promat-promatect-l",
      "where": "Technical data table, Thermal conductivity, 200 ºC row",
      "source_detail": {
        "title": "PROMATECT-L Technical Data Sheet, calcium silicate boards",
        "id": "Promat data sheet, 2017-09 (copyright Etex NV)",
        "url": "https://media.promat.com/doc_682553_us/original/1850243040/promat-data-sheet--promatect-l-en-us.pdf?market=us",
        "year": 2017,
        "kind": "datasheet",
        "license": "manufacturer datasheet, linked not reproduced"
      }
    },
    {
      "benchmark": "thermal_conductivity",
      "label": "Thermal conductivity at 400 °C",
      "value": 0.11,
      "bound": "exact",
      "unit": "W/m K",
      "scope": "material",
      "conditions": {
        "temperature": "400 °C",
        "product": "PROMATECT-L calcium silicate board"
      },
      "method": "Thermal conductivity row at 400 ºC, technical data table; test standard not named",
      "status": "ground",
      "source": "promat-promatect-l",
      "where": "Technical data table, Thermal conductivity, 400 ºC row",
      "source_detail": {
        "title": "PROMATECT-L Technical Data Sheet, calcium silicate boards",
        "id": "Promat data sheet, 2017-09 (copyright Etex NV)",
        "url": "https://media.promat.com/doc_682553_us/original/1850243040/promat-data-sheet--promatect-l-en-us.pdf?market=us",
        "year": 2017,
        "kind": "datasheet",
        "license": "manufacturer datasheet, linked not reproduced"
      }
    },
    {
      "benchmark": "specific_heat",
      "label": "Specific heat capacity",
      "value": 0.95,
      "bound": "exact",
      "unit": "kJ/kg K",
      "scope": "material",
      "conditions": {
        "product": "PROMATECT-L calcium silicate board",
        "temperature": "not stated in the datasheet"
      },
      "method": "Specific heat capacity row, technical data table",
      "status": "ground",
      "source": "promat-promatect-l",
      "where": "Technical data table, Specific heat capacity row",
      "source_detail": {
        "title": "PROMATECT-L Technical Data Sheet, calcium silicate boards",
        "id": "Promat data sheet, 2017-09 (copyright Etex NV)",
        "url": "https://media.promat.com/doc_682553_us/original/1850243040/promat-data-sheet--promatect-l-en-us.pdf?market=us",
        "year": 2017,
        "kind": "datasheet",
        "license": "manufacturer datasheet, linked not reproduced"
      }
    },
    {
      "benchmark": "water_vapour_diffusion_factor",
      "label": "Water vapour diffusion value (mu)",
      "value": 3.2,
      "bound": "exact",
      "unit": "-",
      "scope": "material",
      "conditions": {
        "product": "PROMATECT-L calcium silicate board",
        "note": "printed as approx. 3.2"
      },
      "method": "Water vapour diffusion value row, technical data table",
      "status": "ground",
      "note": "Printed as approximate.",
      "source": "promat-promatect-l",
      "where": "Technical data table, Water vapour diffusion value row",
      "source_detail": {
        "title": "PROMATECT-L Technical Data Sheet, calcium silicate boards",
        "id": "Promat data sheet, 2017-09 (copyright Etex NV)",
        "url": "https://media.promat.com/doc_682553_us/original/1850243040/promat-data-sheet--promatect-l-en-us.pdf?market=us",
        "year": 2017,
        "kind": "datasheet",
        "license": "manufacturer datasheet, linked not reproduced"
      }
    },
    {
      "benchmark": "alkalinity_ph",
      "label": "Alkalinity (approximate)",
      "value": 9,
      "bound": "exact",
      "unit": "pH",
      "scope": "material",
      "conditions": {
        "product": "PROMATECT-L calcium silicate board",
        "note": "printed as approximate"
      },
      "method": "Alkalinity row, technical data table",
      "status": "ground",
      "note": "Printed as approximate.",
      "source": "promat-promatect-l",
      "where": "Technical data table, Alkalinity row",
      "source_detail": {
        "title": "PROMATECT-L Technical Data Sheet, calcium silicate boards",
        "id": "Promat data sheet, 2017-09 (copyright Etex NV)",
        "url": "https://media.promat.com/doc_682553_us/original/1850243040/promat-data-sheet--promatect-l-en-us.pdf?market=us",
        "year": 2017,
        "kind": "datasheet",
        "license": "manufacturer datasheet, linked not reproduced"
      }
    },
    {
      "benchmark": "board_length",
      "label": "Delivered board length",
      "value": 2500,
      "value_high": 3000,
      "bound": "range",
      "unit": "mm",
      "scope": "material",
      "conditions": {
        "sizes": "2500 mm and 3000 mm delivery lengths"
      },
      "method": "Delivery sizes, Length row",
      "status": "ground",
      "note": "Two delivered lengths; the range covers those two sizes only.",
      "source": "promat-promatect-l",
      "where": "Delivery sizes, Length row",
      "source_detail": {
        "title": "PROMATECT-L Technical Data Sheet, calcium silicate boards",
        "id": "Promat data sheet, 2017-09 (copyright Etex NV)",
        "url": "https://media.promat.com/doc_682553_us/original/1850243040/promat-data-sheet--promatect-l-en-us.pdf?market=us",
        "year": 2017,
        "kind": "datasheet",
        "license": "manufacturer datasheet, linked not reproduced"
      }
    },
    {
      "benchmark": "board_width",
      "label": "Delivered board width",
      "value": 1200,
      "bound": "exact",
      "unit": "mm",
      "scope": "material",
      "conditions": {
        "sizes": "one delivery width"
      },
      "method": "Delivery sizes, Width row",
      "status": "ground",
      "source": "promat-promatect-l",
      "where": "Delivery sizes, Width row",
      "source_detail": {
        "title": "PROMATECT-L Technical Data Sheet, calcium silicate boards",
        "id": "Promat data sheet, 2017-09 (copyright Etex NV)",
        "url": "https://media.promat.com/doc_682553_us/original/1850243040/promat-data-sheet--promatect-l-en-us.pdf?market=us",
        "year": 2017,
        "kind": "datasheet",
        "license": "manufacturer datasheet, linked not reproduced"
      }
    },
    {
      "benchmark": "board_thickness",
      "label": "Delivered board thickness",
      "value": 20,
      "value_high": 50,
      "bound": "range",
      "unit": "mm",
      "scope": "material",
      "conditions": {
        "sizes": "delivered as 20, 25, 30, 40 or 50 mm"
      },
      "method": "Delivery sizes, Thickness row",
      "status": "ground",
      "note": "The sizes are discrete; the range runs from the smallest to the largest printed size.",
      "source": "promat-promatect-l",
      "where": "Delivery sizes, Thickness row",
      "source_detail": {
        "title": "PROMATECT-L Technical Data Sheet, calcium silicate boards",
        "id": "Promat data sheet, 2017-09 (copyright Etex NV)",
        "url": "https://media.promat.com/doc_682553_us/original/1850243040/promat-data-sheet--promatect-l-en-us.pdf?market=us",
        "year": 2017,
        "kind": "datasheet",
        "license": "manufacturer datasheet, linked not reproduced"
      }
    },
    {
      "benchmark": "thickness_tolerance",
      "label": "Thickness production tolerance",
      "value": 0.5,
      "bound": "exact",
      "unit": "mm",
      "scope": "material",
      "conditions": {
        "tolerance": "plus or minus, as printed (± 0.5)"
      },
      "method": "Production tolerances, Thickness row",
      "status": "ground",
      "source": "promat-promatect-l",
      "where": "Production tolerances, Thickness row",
      "source_detail": {
        "title": "PROMATECT-L Technical Data Sheet, calcium silicate boards",
        "id": "Promat data sheet, 2017-09 (copyright Etex NV)",
        "url": "https://media.promat.com/doc_682553_us/original/1850243040/promat-data-sheet--promatect-l-en-us.pdf?market=us",
        "year": 2017,
        "kind": "datasheet",
        "license": "manufacturer datasheet, linked not reproduced"
      }
    },
    {
      "benchmark": "length_width_tolerance",
      "label": "Length and width production tolerance",
      "value": 3,
      "bound": "exact",
      "unit": "mm",
      "scope": "material",
      "conditions": {
        "tolerance": "plus or minus, as printed (± 3.0)"
      },
      "method": "Production tolerances, Length and width row",
      "status": "ground",
      "source": "promat-promatect-l",
      "where": "Production tolerances, Length and width row",
      "source_detail": {
        "title": "PROMATECT-L Technical Data Sheet, calcium silicate boards",
        "id": "Promat data sheet, 2017-09 (copyright Etex NV)",
        "url": "https://media.promat.com/doc_682553_us/original/1850243040/promat-data-sheet--promatect-l-en-us.pdf?market=us",
        "year": 2017,
        "kind": "datasheet",
        "license": "manufacturer datasheet, linked not reproduced"
      }
    }
  ],
  "corrosion": [
    {
      "environment": "Moist or humid air",
      "headline": "Promat says the board resists moisture. No moisture test is printed.",
      "effect": "The datasheet lists resistance to moisture and chemicals among its properties, and prints no moisture test, humidity exposure or ageing data. Hi-Temp Fabrication, a distributor, describes calcium silicate boards in general as insoluble in water and non-corroding; that is a family-level statement, not a PROMATECT-L test.",
      "rating": "low",
      "conditions": {
        "product": "PROMATECT-L calcium silicate board",
        "exposure": "not stated in the datasheet"
      },
      "source": "promat-promatect-l",
      "where": "Properties and advantages, resistant to moisture and chemicals"
    },
    {
      "environment": "Heating at 500 °C for 12 hours",
      "headline": "Linear shrinkage of 0.25 % is printed for this heat test.",
      "effect": "The datasheet prints linear shrinkage of 0.25 % after 12 hours at 500 °C. This is a dimensional change under heat, not corrosion, and the datasheet prints no shrinkage at other temperatures.",
      "rating": "low",
      "conditions": {
        "temperature": "500 °C",
        "time": "12 hours"
      },
      "source": "promat-promatect-l",
      "where": "Technical data table, Shrinkage row"
    },
    {
      "environment": "Chemical exposure",
      "headline": "Promat says the board is chemically resistant. It names no chemical.",
      "effect": "The datasheet says the board is resistant to chemicals but names no reagent, concentration, temperature or exposure time. The claim cannot be applied to a specific chemical until the supplier confirms it.",
      "rating": "unknown",
      "conditions": {
        "basis": "datasheet statement only"
      },
      "source": "promat-promatect-l",
      "where": "Properties and advantages, resistant to moisture and chemicals"
    }
  ],
  "risks": {
    "hazards": [
      {
        "text": "Cutting the board makes dust. Promat says the maximum workplace concentration values for inhalable dust must be observed, and that dust extraction is recommended.",
        "ghs": [],
        "source": "promat-promatect-l",
        "where": "Working and processing, cutting paragraph"
      },
      {
        "text": "PubChem's record for generic calcium silicate, which is not the PROMATECT-L board, lists the hazard statement \"Causes serious eye irritation\" from some company reports, and records the substance as not combustible.",
        "ghs": [
          "H319"
        ],
        "source": "pubchem-calcium-silicate",
        "where": "Safety and Hazards: GHS Classification and Fire Hazards (CID 73415800)"
      }
    ],
    "failure_risks": [
      {
        "mode": "Shrinkage under long heating",
        "trigger": "12 hours at 500 °C",
        "consequence": "Linear shrinkage of 0.25 % as printed. This may open gaps at joints in a lined furnace; that effect is an inference from the printed figure, not a statement in the datasheet.",
        "severity": "low",
        "source": "promat-promatect-l",
        "where": "Technical data table, Shrinkage row"
      },
      {
        "mode": "Breakage under bending load",
        "trigger": "Bending load on the board",
        "consequence": "The datasheet prints bending strength of 3.1 N/mm2 and cold compressive strength of 2.4 N/mm2, and gives no safe working load. Design checks are needed before any load-bearing use.",
        "severity": "moderate",
        "source": "promat-promatect-l",
        "where": "Technical data table, Bending strength and Cold compressive strength rows"
      }
    ],
    "side_effects": [],
    "handling": [
      {
        "text": "When cutting to size, observe the maximum workplace concentration values for inhalable dust and use dust extraction, as Promat recommends.",
        "source": "promat-promatect-l",
        "where": "Working and processing"
      },
      {
        "text": "When fixing with screws, use slot holes, as the datasheet recommends.",
        "source": "promat-promatect-l",
        "where": "Working and processing"
      },
      {
        "text": "PROMATECT-L can be machined with special processing machinery and suitable tools; Promat says precise machined parts can be made.",
        "source": "promat-promatect-l",
        "where": "Working and processing"
      }
    ],
    "mitigations": [
      {
        "text": "Use dust extraction at cutting points, as Promat recommends for cutting to size.",
        "source": "promat-promatect-l",
        "where": "Working and processing, cutting paragraph"
      }
    ]
  },
  "uses": [
    {
      "application": "thermal-control",
      "device": "Dryers and industrial furnaces (heavy industry)",
      "example": "Promat lists heat protection, dryers and industrial furnaces under heavy industry as application areas for PROMATECT-L boards.",
      "source": "promat-promatect-l",
      "where": "Application areas, Heavy industry list"
    },
    {
      "application": "thermal-control",
      "device": "Ventilation and air conditioning equipment (OEM)",
      "example": "Promat lists ventilation and air conditioning technology, with apparatus construction, under OEM application areas.",
      "source": "promat-promatect-l",
      "where": "Application areas, OEM list"
    },
    {
      "application": "structures",
      "device": "Load-bearing pipe columns (oil and gas)",
      "example": "Promat lists load-bearing pipe columns under oil and gas application areas.",
      "source": "promat-promatect-l",
      "where": "Application areas, Oil and gas list"
    }
  ],
  "supply": [
    {
      "subject": "Lime (calcium feedstock, quicklime and hydrated lime)",
      "abundance": "USGS: domestic and world resources of limestone and dolomite suitable for lime manufacture are very large.",
      "producers": [
        {
          "country": "China",
          "share_percent": 73.8,
          "year": 2025
        },
        {
          "country": "India",
          "share_percent": 4,
          "year": 2025
        },
        {
          "country": "United States",
          "share_percent": 3.6,
          "year": 2025
        },
        {
          "country": "Russia",
          "share_percent": 2.9,
          "year": 2025
        }
      ],
      "critical_lists": [
        {
          "list": "USGS 2025 final list of critical minerals: lime not listed",
          "listed": false
        },
        {
          "list": "EU critical raw materials list: lime and calcium not listed",
          "listed": false
        }
      ],
      "recycling": "USGS lime chapter: large quantities of lime are regenerated by paper mills, and some water-treatment plants regenerate lime from softening sludge.",
      "substitutes": [
        "USGS: limestone is a substitute for lime in many applications but reacts more slowly. Cement and fly ash are potential substitutes for some construction uses of lime; no substitute for lime in calcium silicate board is named."
      ],
      "source": "usgs-mcs2026-lime",
      "where": "World Lime Production and Limestone Reserves table, 2025e column. Shares are computed by Space Mushroom from each country's printed tonnage over the printed world total of 420,000 thousand t (rounded). Substitutes and Recycling sections."
    },
    {
      "subject": "Silicon (silica feedstock, from quartzite)",
      "abundance": "USGS: world and domestic resources for making silicon metal and alloys are abundant; the source of the silicon is silica in various natural forms, such as quartzite.",
      "producers": [
        {
          "country": "China",
          "share_percent": 87,
          "year": 2025
        },
        {
          "country": "Brazil",
          "share_percent": 3.9,
          "year": 2025
        },
        {
          "country": "Norway",
          "share_percent": 2.8,
          "year": 2025
        },
        {
          "country": "Russia",
          "share_percent": 0.8,
          "year": 2025
        }
      ],
      "critical_lists": [
        {
          "list": "USGS 2025 final list of critical minerals: silicon listed",
          "listed": true
        },
        {
          "list": "EU critical raw materials list: silicon metal listed",
          "listed": true
        }
      ],
      "recycling": "USGS silicon chapter: recycling is insignificant.",
      "substitutes": [
        "USGS: aluminum, silicon carbide and silicomanganese can substitute for ferrosilicon in some applications; no substitute for silica in calcium silicate board is named."
      ],
      "source": "usgs-mcs2026-silicon",
      "where": "World Production table, silicon metal, 2025 column. Shares are computed by Space Mushroom from each country's printed tonnage over the printed world total of 4,600 thousand t, silicon content (rounded). This is a proxy for silica supply, not a silica sand table. World Resources, Recycling and Substitutes sections."
    }
  ],
  "media": [],
  "documents": [
    {
      "title": "PROMATECT-L Technical Data Sheet, calcium silicate boards (Promat, 2017-09)",
      "type": "datasheet",
      "url": "https://media.promat.com/doc_682553_us/original/1850243040/promat-data-sheet--promatect-l-en-us.pdf?market=us",
      "year": 2017
    },
    {
      "title": "CalSilBoard technology and technical data page (Qingdao Henry Cal Sil New Materials Co., Ltd.)",
      "type": "datasheet",
      "url": "https://www.calsilboard.com/technology.html",
      "year": 2025
    },
    {
      "title": "PubChem: Calcium Silicate (CID 73415800), GHS classification summary",
      "type": "database",
      "url": "https://pubchem.ncbi.nlm.nih.gov/compound/73415800",
      "year": 2026
    },
    {
      "title": "Mineral Commodity Summaries 2026: Lime (USGS)",
      "type": "report",
      "url": "https://pubs.usgs.gov/periodicals/mcs2026/mcs2026-lime.pdf",
      "year": 2026
    },
    {
      "title": "Mineral Commodity Summaries 2026: Silicon (USGS)",
      "type": "report",
      "url": "https://pubs.usgs.gov/periodicals/mcs2026/mcs2026-silicon.pdf",
      "year": 2026
    }
  ],
  "gaps": [
    "Promat does not print a composition for PROMATECT-L. The recipe describes calcium silicate board as CalSilBoard describes its own boards, and no PROMATECT-L composition value is recorded.",
    "No continuous service temperature is printed for PROMATECT-L; the classification temperature is the only temperature limit in the datasheet.",
    "Reversible thermal expansion is printed with an exponent, so it is left out, per the rule for exponent values.",
    "Typical air-dry moisture content is printed with a comma decimal, which the value check cannot match, so it is left out.",
    "Neither the compressive nor the bending test standard is named in the datasheet, so the test method for those two values is unknown.",
    "Thermal conductivity is recorded only at 20, 200 and 400 °C as printed in the table; the datasheet graph is not used as a value.",
    "Classification temperature, linear shrinkage, compressive strength, water vapour diffusion value, alkalinity and production tolerances are not in spores/property-canon.yaml; short snake_case names are used for them.",
    "No test report for the DIN or EN fire classes of this grade was found; the fire class is the datasheet statement only.",
    "Moisture resistance is a datasheet claim only; no moisture test, humidity exposure or ageing data for PROMATECT-L were found.",
    "No PROMATECT-L safety data sheet was read. The hazard entries use the datasheet's dust advice and PubChem's generic calcium silicate record, which is not this board.",
    "Feedstock shares are for lime and silicon metal as a whole; no producer share for calcium silicate board was found.",
    "No open-access paper on PROMATECT-L or on autoclaved xonotlite board properties was found in this run; an index search returned only an abstract that could not be opened, so it is not used.",
    "No space flight, vacuum, radiation or thermal-vacuum result for calcium silicate board was found; the profile holds ground datasheet values only.",
    "Other calcium silicate grades (CalSilBoard grades, Promatect-H, Promatect-MST, and the Monalite and Marinite lines) are not recorded here; each grade has its own datasheet."
  ],
  "story": {
    "why": "Calcium silicate board is a lightweight, rigid insulation board. Promat's PROMATECT-L datasheet gives a classification temperature of 500 °C, a bulk density of 450 kg/m3 and a thermal conductivity of 0.08 W/m K at 20 °C. Those figures explain where the board is chosen: dryers, industrial furnaces and ventilation equipment, where it both insulates and holds its shape. The datasheet classification is not a continuous service limit.",
    "uses": [
      {
        "where": "Dryers and industrial furnaces",
        "line": "Promat lists dryers and industrial furnaces, under heavy industry, as application areas for PROMATECT-L."
      },
      {
        "where": "Ventilation and air conditioning equipment",
        "line": "Promat lists ventilation and air conditioning technology, with apparatus construction, under OEM application areas."
      },
      {
        "where": "Load-bearing pipe columns, oil and gas",
        "line": "Promat lists load-bearing pipe columns under oil and gas. The datasheet gives a bending strength of 3.1 N/mm2, so any structural use needs a load check."
      }
    ],
    "can_do": [
      {
        "label": "Insulation at 20 °C",
        "line": "Promat prints a thermal conductivity of 0.08 W/m K at 20 °C. It rises to 0.11 W/m K at 400 °C, the highest temperature in the table.",
        "scope": "material",
        "value": "0.08 W/m K at 20 °C"
      },
      {
        "label": "Classification temperature",
        "line": "Promat classifies the board to 500 °C. This is not a continuous service temperature, and the datasheet gives none.",
        "scope": "material",
        "value": "500 °C"
      },
      {
        "label": "Strength",
        "line": "The cold compressive strength is 2.4 N/mm2 and the bending strength is 3.1 N/mm2. The datasheet names no test standard for either.",
        "scope": "material",
        "value": "2.4 N/mm2 cold compressive"
      },
      {
        "label": "Board size",
        "line": "Promat delivers the board 1200 mm wide, in lengths of 2500 or 3000 mm and thicknesses of 20 to 50 mm.",
        "scope": "material",
        "value": "1200 mm wide"
      }
    ],
    "compare": "Promat rates PROMATECT-L at 500 °C as a classification temperature and gives no continuous service temperature, so that figure should not be set against the continuous-use limits of other insulation materials. CalSilBoard, a Chinese maker of calcium silicate board, lists separate maximum and continuous service temperatures for its own grades, so the two datasheets use different limits and must be read with each one's definition. Unlike a fibre blanket, the board is rigid and can be machined, as the Promat datasheet describes.",
    "compare_rows": [
      {
        "label": "Classification temperature",
        "benchmark": "classification_temperature",
        "scope": "material"
      },
      {
        "label": "Bulk density",
        "benchmark": "density",
        "scope": "material"
      },
      {
        "label": "Thermal conductivity at 20 °C",
        "benchmark": "thermal_conductivity",
        "scope": "material"
      }
    ],
    "handling": [
      "Cut with dust control: observe the workplace limit for inhalable dust and use dust extraction, as Promat recommends.",
      "Fix with screws through slot holes, as Promat recommends when screws are used.",
      "Machine with suitable tools. Promat says precise machined parts can be made from the board."
    ],
    "good_for": [
      "Dryers and industrial furnaces, where Promat gives a 500 °C classification and a 0.08 W/m K conductivity at 20 °C.",
      "Ventilation and air conditioning equipment, which Promat lists as an OEM application area."
    ],
    "watch_out": [
      "The 500 °C figure is a classification temperature. No continuous service temperature is printed for PROMATECT-L.",
      "Cutting makes dust. Use extraction and observe the inhalable dust limit.",
      "A bending strength of 3.1 N/mm2 is low for load-bearing use without a design check.",
      "No space flight, vacuum or radiation data for calcium silicate board were found in the sources we hold."
    ],
    "verdict": "Promatect-L is a calcium silicate board with datasheet values for temperature, density and conductivity. It has no space flight data, and the datasheet prints no continuous service temperature.",
    "recipe": {
      "line": "Calcium silicate board is a rigid insulation board made from siliceous and calcareous raw materials with reinforcing fibres. CalSilBoard says its boards are mixed, formed as a slurry and autoclaved under high pressure to grow a xonotlite crystal structure. Promat does not print the composition of PROMATECT-L, so the parts below describe the general process, not a measured recipe.",
      "parts": [
        {
          "name": "Calcium silicate (xonotlite) matrix",
          "symbol": "xonotlite",
          "role": "The crystalline matrix formed in the autoclave; it gives the board its strength and low conductivity.",
          "share_note": "not printed for PROMATECT-L",
          "source": "calsilboard-technology",
          "where": "What Is Calcium Silicate Board"
        },
        {
          "name": "Siliceous raw material",
          "role": "Silica source for the autoclaved calcium silicate phase.",
          "share_note": "not printed for PROMATECT-L",
          "source": "calsilboard-technology",
          "where": "How Calcium Silicate Board Is Made"
        },
        {
          "name": "Calcareous raw material",
          "role": "Lime source for the calcium silicate phase.",
          "share_note": "not printed for PROMATECT-L",
          "source": "calsilboard-technology",
          "where": "How Calcium Silicate Board Is Made"
        },
        {
          "name": "Reinforcing fibres",
          "role": "Add strength to the board.",
          "share_note": "not printed for PROMATECT-L",
          "source": "calsilboard-technology",
          "where": "How Calcium Silicate Board Is Made"
        }
      ]
    },
    "risk_groups": [
      {
        "title": "For people",
        "lead": "Promat's datasheet gives no hazard classification for PROMATECT-L. Cutting it makes dust, which Promat says must be controlled.",
        "points": [
          {
            "label": "Dust",
            "line": "Promat says to observe the maximum workplace concentration values for inhalable dust when cutting, and recommends dust extraction."
          },
          {
            "label": "Eye contact",
            "line": "PubChem's record for generic calcium silicate, which is not this board, lists the hazard statement \"Causes serious eye irritation\" from some company reports."
          },
          {
            "label": "Fire",
            "line": "Promat gives the board a building material class of A1, non-combustible, under the German DIN standard. PubChem's generic record also says calcium silicate is not combustible."
          }
        ],
        "level": 1,
        "verdict": "Dust when cutting needs extraction"
      },
      {
        "title": "If it overheats",
        "lead": "Heat is the main test for this board. It shrinks slightly after long heating, and the datasheet gives a classification temperature, not a service limit.",
        "points": [
          {
            "label": "Shrinkage",
            "line": "Promat prints a shrinkage of 0.25 % after 12 hours at 500 °C."
          },
          {
            "label": "Limit",
            "line": "The 500 °C figure is a classification temperature. The datasheet prints no continuous service temperature for PROMATECT-L."
          }
        ]
      }
    ]
  },
  "updated": "2026-11-01",
  "review": {
    "status": "draft",
    "method": "assistant",
    "checked_values": 16,
    "unreachable": 0,
    "caveats": 4,
    "note": "Written 2026-11-01 from the Promat PROMATECT-L datasheet (read as PDF text), the CalSilBoard and Hi-Temp Fabrication pages, USGS Mineral Commodity Summaries 2026, PubChem, and the USGS and European Commission critical-mineral lists. Values taken from the Promat datasheet are as printed."
  },
  "sources": {
    "promat-promatect-l": {
      "title": "PROMATECT-L Technical Data Sheet, calcium silicate boards",
      "id": "Promat data sheet, 2017-09 (copyright Etex NV)",
      "url": "https://media.promat.com/doc_682553_us/original/1850243040/promat-data-sheet--promatect-l-en-us.pdf?market=us",
      "year": 2017,
      "kind": "datasheet",
      "license": "manufacturer datasheet, linked not reproduced"
    },
    "calsilboard-technology": {
      "title": "Calcium Silicate Board Technology and Technical Data (Qingdao Henry Cal Sil New Materials Co., Ltd.)",
      "id": "CalSilBoard website, page technology (copyright 2025)",
      "url": "https://www.calsilboard.com/technology.html",
      "year": 2025,
      "kind": "web",
      "license": "manufacturer web page, linked not reproduced"
    },
    "hi-tempfab-calcium-silicate": {
      "title": "Calcium Silicate Insulation Boards (Hi-Temp Fabrication, distributor)",
      "id": "Hi-Temp Fabrication page calcium-silicate-boards",
      "url": "https://hi-tempfab.com/materials/calcium-silicate-boards",
      "kind": "web",
      "license": "distributor web page, linked not reproduced"
    },
    "usgs-mcs2026-lime": {
      "title": "Mineral Commodity Summaries 2026, Lime",
      "id": "USGS MCS 2026, February 2026",
      "url": "https://pubs.usgs.gov/periodicals/mcs2026/mcs2026-lime.pdf",
      "year": 2026,
      "kind": "report",
      "license": "public domain (USGS)"
    },
    "usgs-mcs2026-silicon": {
      "title": "Mineral Commodity Summaries 2026, Silicon",
      "id": "USGS MCS 2026, February 2026",
      "url": "https://pubs.usgs.gov/periodicals/mcs2026/mcs2026-silicon.pdf",
      "year": 2026,
      "kind": "report",
      "license": "public domain (USGS)"
    },
    "usgs-crit2025": {
      "title": "About the 2025 List of Critical Minerals (USGS)",
      "id": "USGS final 2025 List of Critical Minerals",
      "url": "https://www.usgs.gov/programs/mineral-resources-program/science/about-2025-list-critical-minerals",
      "year": 2025,
      "kind": "web",
      "license": "public domain (USGS)"
    },
    "ec-crm": {
      "title": "Critical raw materials (European Commission)",
      "id": "Regulation (EU) 2024/1252 as shown on the European Commission page",
      "url": "https://single-market-economy.ec.europa.eu/sectors/raw-materials/areas-specific-interest/critical-raw-materials_en",
      "year": 2024,
      "kind": "web",
      "license": "European Commission web page"
    },
    "pubchem-calcium-silicate": {
      "title": "PubChem compound record, Calcium Silicate (CID 73415800)",
      "id": "CID 73415800; generic calcium silicate record",
      "url": "https://pubchem.ncbi.nlm.nih.gov/compound/73415800",
      "year": 2026,
      "kind": "database",
      "license": "public domain (NCBI)"
    }
  },
  "license": "CC-BY-4.0",
  "url": "https://spacemushroom.com/profiles/calcium-silicate-board/"
}