• Description for Bostik Chem-Calk 500

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

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    Application Type Bond, Seal
    1 Part or 2 Part 2 Part
    Material Form Paste
    Substrate Ceramics, Porous, Plastics, Steel, Wood
    Manufacturer Bostik
    Chemistry Polyurethane
    Cure Method 2 Parts
    Cure Temperature (°C) 25
    Cure Time (min) 10,080
    Viscosity (cPs) Slump, Non-Sag
    Color Stone, standard colors, Uni-base
    Ozone Resistance Excellent Ozone resistance
    High Temperature Resistance (°C) 66
    Low Temperature Resistance (°C) -29
    Density (g/cm³) 13.4 (lbs/gal)
    Key Specifications ASTM (American Standard Test Method): C920: ASTM C920, Standard specification for elastomeric joint sealant, as Type M, Grade NS, Class 25, Use NT, A and M, CAN/CGSB (Canadian General Standards Board): CAN/CGSB 19.24-M90, TT (U.S. Federal Specification): S-227: TT-S-227 (Com. NBS) for two component sealants, Type II, Class A
  • Technical Data

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  • Best Practices

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Cure Temperature Test Methods
Cure Temperature Cure Time Test Method
25°C After 7 days cure at 77°F and 50% RH
Cure Time Test Methods
Cure Time Test Method
10,080 min After 7 days cure at 77°F and 50% RH
Work / Pot Time Test Methods
Work / Pot Time Test Method
120 min ASTM C603, modified, approximately, Relative to temperature
Tensile Strength Test Methods
Tensile Strength Cure Time Cure Temperature Cure Humidity Test Method
120 psi 10,080 min 25°C 50 % ASTM D 412, After 7 days cure at 77°F and 50% RH
UV Resistance Test Methods
UV Resistance Test Method
Good ASTM C 793 75
Modulus Test Methods
Modulus Test Method
65 psi ASTM D 412
Shore A Hardness Test Methods
Shore A Hardness Shore Hardness Test Method Hardness Temperature
20 ASTM D 2240, After 7 days cure at 77°F and 50% RH 25°C
Density Test Methods
Density Test Method
13.4 (lbs/gal) ASTM D1475