• Description for Bostik Chem-Calk 550

    Two-component, pourable, 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, Seal
    1 Part or 2 Part 2 Part
    Material Form Paste
    Substrate Ceramics, Porous, Metals, Plastics, Steel, Wood, Concrete
    Manufacturer Bostik
    Chemistry Polyurethane
    Cure Method 2 Parts
    Cure Temperature (°C) 25
    Cure Time (min) 10,080
    Viscosity (cPs) Pourable
    Color Stone, standard colors (25), 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: C920, Type M, Grade P, Class 25, CAN/CGSB (Canadian General Standards Board): CAN/CGSB-19.24-M90, TT (U.S. Federal Specification): S-227E: TT-S-227E Class A
  • Technical Data

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  • Best Practices

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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 Temperature
120 to 300 min Bostik Method 24°C
Cure Temperature Test Methods
Cure Temperature Cure Time Test Method
25°C After 7 days cure at 77°F and 50% RH
Tensile Strength Test Methods
Tensile Strength Cure Time Cure Temperature Cure Humidity Test Method
230 psi 10,080 min 25°C 50 % ASTM D 412, After 7 days cure at 77°F and 50% RH
Peel Strength Test Methods
Peel Strength Cure Time Cure Temperature Cure Humidity Test Method
>12 piw 10,080 min 25°C 50 % ASTM C 794, 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
75 psi 100%, ASTM D 412, After 7 days cure at 77°F and 50% RH
Shore A Hardness Test Methods
Shore A Hardness Shore Hardness Test Method Hardness Temperature
35 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