Bostik Chem-Calk 300 Datasheet Bostik Chem-Calk 300

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  • Description for Bostik Chem-Calk 300

    One-component architectural grade sealant; properties remain stable in severe weather and temperature changes.

    *See Terms of Use Below

    Application Type Bond, Seal, Gaskets
    1 Part or 2 Part 1-Part
    Material Form Paste
    Substrate Butyl rubber, Porous substrates, Neoprene
    Industry Door jambs
    Manufacturer Bostik
    Chemistry Butyl Rubber
    Cure Method Solvent
    Color Black, Gray, White, Bronze
    Key Specifications ASTM (American Standard Test Method): ASTM C-1085; ASTM C 1311, CAN/CGSB (Canadian General Standards Board): CGSB 19-GP-14M, TT (U.S. Federal Specification): TT-S-001657
  • Technical Data for Bostik Chem-Calk 300

    • Application Type
    • 1 Part or 2 Part
      • 1-Part
    • Material Form
      • Paste
    • Substrate
      • Porous Substrates
      • Butyl Rubber
      • Neoprene
    • Industry
    • Chemistry
      • Other - Butyl Rubber
    • Application Method
      • Dispenser - Gun
    • Cure Method
      • Solvent
    • Color
      • Black
      • Gray
      • White
      • Yellow - Bronze
    • Key Specifications
      • ASTM (American Standard Test Method) : C 1311 - ASTM C-1085; ASTM C 1311
      • ASTM (American Standard Test Method) : C-1085 - ASTM C-1085; ASTM C 1311
      • CAN/CGSB (Canadian General Standards Board) : 19-GP-14M - CGSB 19-GP-14M
      • TT (U.S. Federal Specification) : S-001657 - TT-S-001657
    Cure Specs
    Work / Pot Time (min) Long
    Shore A Hardness Pass Test Method
    Business Information
    Shelf Life Details Shelf life of Chem-Calk® 300 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.
    Not Good For
    Don't Use For narrow joints, fillet joints and face nail holes., over joints is not recommended., sealing horizontal joints or traffic-bearing joints, Bad Applications
  • Best Practices for Bostik Chem-Calk 300

    *See Terms of Use Below

    1. 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. Backer Rods and Bond Breaker Tapes: Bond breakers, including, but not limited to, closed-cell polyethylene backer rods, are used to control depth of the sealant bead, provide a firm tooling surface and avoid three-sided adhesion. Where the depth of joint prevents use of backer rods, a polyethylene strip or tape must be used as a bond breaker to prevent 3-sided adhesion. Do not prime or damage the surface of the bond breaker. Refer to instructions given by rod and tape manufacturers for the correct backer rod and tape size related to joint size.

    2. Curing

      Chem-Calk® 300 is a butyl rubber sealant. It relies on the evaporation of solvents to reach its cured, performance state. Skin and cure times vary relative to ambient conditions.

    3. 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 MSDS’s provided for these solvents before use. Bostik® Hand & 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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Shore A Hardness Test Methods
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Pass C 661