Bostik Chem-Calk 550

Bostik Chem-Calk 550 Datasheet
  • 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 for Bostik Chem-Calk 550

    Overview
    • Application Type
    • 1 Part or 2 Part
      • 1 Part or 2 Part - 2 Part
    • Material Form
      • Paste
    • Substrate
    • Industry
      • Industrial - Control, Malls, Sealing expansion
      • Construction - Driveways, Factory floors, Institutional floors, Patios, Pavements, Perimeter joints in parking decks, Plazas
    • Chemistry
    • Cure Method
      • 2-Part Cure - 2 Parts
    • Color
      • Gray - Stone
      • Other - standard colors (25), Uni-base
    • Key Specifications
      • ASTM (American Standard Test Method): C920: Class 25 - C920, Type M, Grade P, Class 25
      • CAN/CGSB (Canadian General Standards Board): 19.24 - CAN/CGSB-19.24-M90
      • TT (U.S. Federal Specification): S-227E: Class A - TT-S-227E Class A
    Specifications
    Cure Specs
    Cure Temperature (°C) 25 Test Method
    Cure Time (min) 10,080 Test Method
    Viscosity (cPs) Pourable
    Work / Pot Time (min) 120 to 300 Test Method
    Bond Strength
    Peel Strength (piw) >12 Test Method
    Tensile Strength (psi) 230 Test Method
    Material Resistance
    Ozone Resistance Excellent Ozone resistance
    UV Resistance Good Test Method
    High Temperature Resistance (°C) 66
    Low Temperature Resistance (°C) -29
    Hardness
    Shore A Hardness 35 Test Method
    Flexibility Flexible, Elastomeric
    Modulus (psi) 75 Test Method
    Other Properties
    Density (g/cm³) 13.4 (lbs/gal) Test Method
    Business Information
    Shelf Life Details When stored at or below 80°F (27°C), Chem-Calk® 550 polyurethane weatherproofing sealant has a shelf life of twelve months from date of shipment from Bostik Findley’s warehouse facilities.
    Shelf Life Temperature (°F) <80
    Shelf Life Type From the date of shipment
    Shelf Life (mon) 12
    Not Good For
    Don't Use For submerged joints, exterior or interior structural sealing of submerged applications.
    Don't Use With marble, limestone, granite
  • Best Practices for Bostik Chem-Calk 550

    *See Terms of Use Below

    1. Application

      Install backup material or joint filler as specified

      and primer when applicable. Apply Chem-Calk® 550 polyurethane sealant in a continuous operation using a positive pressure adequate to properly fill and seal the joint. The Chem-Calk® 550 is pourable and will tend to seek its own level. Tooling is recommended to ensure proper wetting of the joint surfaces.

    2. Mixing

      Chem Calk® 550 is a multipart sealant, provided as base, activator (or curing agent) and color pack. All the accelerator and appropriate color pack must be thoroughly mixed with the base to avoid uncured areas and/or color streaks. Failure to follow mixing instructions implicitly can result in spotty cure, random cure or complete lack of cure of the sealant. Do not attempt to mix partial units, as the exact ratio of curing agent to base is essential for optimum performance.

      See Vendor Technical Data Sheet for more info.

    3. Clean-Up

      Excess sealant should be dry-wiped from all surfaces while still uncured, and followed with a commercial solvent wipe. Contact Technical Service for specific solvent recommendations. Should sealant accidentally begin to cure on adjacent porous surfaces, the excess sealant should be allowed to progress through the initial cure or setup. It should be removed promptly by abrasion or other mechanical means. CURED SEALANT IS USUALLY VERY DIFFICULT TO REMOVE WITHOUT ALTERING OR DAMAGING THE SURFACE TO WHICH THE SEALANT HAS BEEN MISAPPLIED. Bostik Findley recommends the use of Bostik® Hand & Tool Towels for easy removal of uncured CC550 from surfaces, hands and tools.

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    *See Terms of Use Below

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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
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