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
    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
  - benchmark: density
    label: Bulk density
    value: 450
    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
  - benchmark: compressive_strength
    label: Cold compressive strength
    value: 2.4
    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
  - benchmark: flexural_strength
    label: Bending strength
    value: 3.1
    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
  - benchmark: linear_shrinkage
    label: Shrinkage after 12 hours at 500 °C
    value: 0.25
    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
  - benchmark: thermal_conductivity
    label: Thermal conductivity at 20 °C
    value: 0.08
    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
  - benchmark: thermal_conductivity
    label: Thermal conductivity at 200 °C
    value: 0.1
    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
  - benchmark: thermal_conductivity
    label: Thermal conductivity at 400 °C
    value: 0.11
    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
  - benchmark: specific_heat
    label: Specific heat capacity
    value: 0.95
    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
  - benchmark: water_vapour_diffusion_factor
    label: Water vapour diffusion value (mu)
    value: 3.2
    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
  - benchmark: alkalinity_ph
    label: Alkalinity (approximate)
    value: 9
    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
  - 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
  - benchmark: board_width
    label: Delivered board width
    value: 1200
    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
  - 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
  - benchmark: thickness_tolerance
    label: Thickness production tolerance
    value: 0.5
    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
  - benchmark: length_width_tolerance
    label: Length and width production tolerance
    value: 3
    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
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.
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.
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
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.
story:
  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
      level: 1
      verdict: Dust when cutting needs extraction
      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.
    - 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.
  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
      value: 0.08 W/m K 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.
    - label: Classification temperature
      value: 500 °C
      line: Promat classifies the board to 500 °C. This is not a continuous service temperature, and the datasheet gives none.
    - label: Strength
      value: 2.4 N/mm2 cold compressive
      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.
    - label: Board size
      value: 1200 mm wide
      line: Promat delivers the board 1200 mm wide, in lengths of 2500 or 3000 mm and thicknesses of 20 to 50 mm.
  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
    - label: Bulk density
      benchmark: density
    - label: Thermal conductivity at 20 °C
      benchmark: thermal_conductivity
  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.