• Description for Bostik CC-900

    One-component, architectural grade sealant capable of dynamic joint movement; properties remain stable in severe weather and temperature changes.

    *See Terms of Use Below

    Application Type Bond, Repair, Seal
    1 Part or 2 Part 1-Part
    Material Form Paste
    Substrate Ceramics, Metals, Plastics, Steel, Wood
    Industry Window framing, Door framing
    Manufacturer Bostik
    Chemistry Polyurethane
    Cure Method Moisture
    Cure Temperature (°C) 25
    Cure Time (min) 4,320 to 10,080
    Viscosity (cPs) Non-Sag, Slump
    Color Black, Tan, Limestone, Limestone, Antique White, Medium Bronze, Stone, White, Bronze
    High Temperature Resistance (°C) 66
    Low Temperature Resistance (°C) -40
    Durability Tough
  • Technical Data for Bostik CC-900

    • Application Type
    • 1 Part or 2 Part
      • 1-Part
    • Material Form
      • Paste
    • Substrate
    • Industry
      • Industrial - Concrete panels, Metal Curtain Walls
      • Construction - Building components, Masonry
      • Construction Window - Window framing
      • Construction Door - Door framing
    • Chemistry
    • Application Method
      • Dispenser - Gun
    • Cure Method
      • Moisture / Condensation Cure - Moisture
    • Color
      • Metallic - Medium Bronze, Bronze
      • Black
      • Brown - Tan
      • Gray - Limestone, Stone
      • Off-White - Limestone
      • White - Antique White
    Cure Specs
    Cure Temperature (°C) 25 Test Method
    Cure Time (min) 4,320 to 10,080 Test Method
    Viscosity (cPs) Non-Sag, Slump
    Tack Free Time (min) 360 Test Method
    Work / Pot Time (min) 70 Test Method
    Bond Strength
    Peel Strength (piw) >35 Test Method
    Tensile Strength (psi) 180 Test Method
    Material Resistance
    UV Resistance Pass Test Method
    High Temperature Resistance (°C) 66
    Low Temperature Resistance (°C) -40
    Durability Tough
    Shore A Hardness 38 Test Method
    Elongation (%) 950 Test Method
    Flexibility Flexible, Elastomeric
    Modulus (psi) 70 Test Method
    Business Information
    Shelf Life Details Shelf life of Chem-Calk 900 must be checked prior to using the product; do not use past its shelf life. Caulk past its shelf life may not perform or adhere as described by this data sheet. High temperature and high relative humidity may reduce significantly the shelf life of polyurethane sealants.
  • Best Practices for Bostik CC-900

    *See Terms of Use Below

    1. Design

      In general, more joint movement can be accommodated in a thin bead of sealant than a thick bead. Chem-Calk® 900 polyurethane sealant should be no thicker than 1/2" (12.7mm) and no thinner than 1/4" (6.4mm). In joints between 1/2" and 1", the ratio of sealant width to depth should be approximately 2:1. Sealant depth in joints between 1/4” and 1/2" should be 1/4" deep. Joints with dynamic movement should not be designed in widths less than 1/4".

    2. Surface Preparation

      See limitations about surface preparation. Surfaces must be structurally clean, dry (no frost) and structurally sound, free of contaminants, including but not limited to dust, dirt, loose particles, tar, asphalt, rust, mill oil, etc. If substrate is painted or coated, scrape away all loose and weakly bonded paint or coating. Any paint or coating that cannot be removed must be tested to verify adhesion of the sealant or to determine the appropriate surface preparation if needed. (See ASP section on next page for details.) To remove laitance and any other loose material, clean concrete, stone or other masonry materials with nonalcoholic-based solvent by washing, grinding, sandblasting or wire brushing as necessary . Do not use water to clean substrates. Dust must be thoroughly removed after cleaning.

    3. Curing

      Chem-Calk 900 is a moisture cure, polyurethane sealant. On wood, with ambient air at 50% relative humidity and at 73°F, polyurethane sealants will generally skin within four hours and cure 1/16 of an inch per day. Lower temperature and lower relative humidity will significantly increase the skin time and cure time of a polyurethane sealant.

    4. Clean-Up

      After dry-wiping uncured sealant from substrates and tools, remaining uncured sealant can be removed by using Xylene, Toluene or similar aromatic solvents. Please refer to the MSDSs provided for these solvents before use. Bostik® Hand and Tool towels can also remove uncured sealant. Cured sealant is usually very difficult to remove without altering or damaging the surface to which the sealant has been misapplied. Cured sealant can be removed by abrasion or other mechanical means (scrapers, putty knives).

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Cure Temperature Test Methods
Cure Temperature Cure Time Test Method
25°C Uncured, Varies w/relative humidity
Cure Time Test Methods
Cure Time Test Method
4,320 to 10,080 min Uncured, Varies w/relative humidity
Tack Free Time Test Methods
Tack Free Time Test Method
360 min Uncured, TT-S-00230C/ASTM C 679
Work / Pot Time Test Methods
Work / Pot Time Test Method
70 min Uncured, Bostik Test Method
Peel Strength Test Methods
Peel Strength Cure Time Cure Temperature Cure Humidity Test Method
>35 piw 20,160 min 25°C 50 % TT-S-00230C/ASTM C 794, After 14 days cure at 77°F and 50% RH
Tensile Strength Test Methods
Tensile Strength Cure Time Cure Temperature Cure Humidity Test Method
180 psi 20,160 min 25°C 50 % @ Break, ASTM D 412, After 14 days cure at 77°F and 50% RH
UV Resistance Test Methods
UV Resistance Test Method
Pass ASTM C 793
Elongation Test Methods
Elongation Test Method
950 % ASTM D 412, at break, After 14 days cure at 77°F and 50% RH
Modulus Test Methods
Modulus Test Method
70 psi @ 100% Elongation ASTM D 412, After 14 days cure at 77°F and 50% RH
Shore A Hardness Test Methods
Shore A Hardness Shore Hardness Test Method Hardness Temperature
38 ASTM D 2240, After 14 days cure at 77°F and 50% RH 25°C