Caulking & Sealing Compounds — Asbestos Exposure Crosswalk

What This Equipment Is

Caulking and sealing compounds are tube- or trowel-applied pastes used to seal joints, gaps, and penetrations in building construction. The compounds need to remain flexible across temperature swings, adhere to dissimilar materials, and (for some applications) resist water, fire, weather, or chemical attack. From the 1940s through the late 1970s, several major caulk and sealant product families included chrysotile asbestos fiber as a reinforcement to control sag, improve flexibility retention, and provide fire resistance.

Asbestos-bearing compounds appeared in:

  • General-purpose construction caulks — exterior caulks at window trim, siding joints, masonry control joints
  • Glazing compound — putty used to bed window glass in wood or steel frames
  • Roof-patching mastic — tar-and-fiber compounds used to seal roof seams, flashings, and penetrations (see Asbestos Roofing for related material)
  • Industrial sealants — high-temperature joint compounds in plant and process applications
  • Fire-rated penetration sealants — early generations of through-penetration firestop products
  • Stove and furnace cement — high-temperature compounds for sealing stove-pipe joints, boiler joints, and furnace door perimeters
  • Marine and shipboard sealants — used in ship construction and overhaul

Why Caulking Work Was an Asbestos Exposure Pathway

Caulks and sealants in service are relatively non-friable. Exposure arises during:

  • Application — limited fiber release; the wet compound binds the fiber
  • Cleanup and tool washing — solvents and rags spread paste residue
  • Removal and renovation — scraping aged, dried, brittle caulk from joints releases fiber from the cured matrix; power-tool cleanup (grinder, oscillating tool, scraper-and-heat-gun) intensifies the exposure
  • Demolition — bulk removal of caulked assemblies (windows, exterior cladding, roof flashings) in renovation and tear-down

Window-glazing removal during window-replacement projects is a particularly documented exposure pathway for residential renovation contractors and homeowners. Roof-patching mastic disturbance during re-roofing is another.

Manufacturers Named in Caulking and Sealant Litigation

  • DAP — caulks, sealants, and glazing compounds
  • 3M — sealants and caulking products
  • Bostik / Bostik Findley — adhesives and sealants
  • Pecora Corporation — sealants
  • Tremco — commercial caulks and sealants
  • GE Silicones — specialty sealants
  • W.R. Grace — fire-rated and specialty sealants
  • Johns-Manville — mastic and caulking compounds
  • Bondex / Reardon — patching compounds

Documented Product References

Images sourced from publicly available product-identification reference materials. Inclusion does not constitute a finding of liability against any company.

Trust Funds That May Apply

  • Manville Personal Injury Settlement Trust
  • W.R. Grace Asbestos PI Trust
  • Bondex Asbestos PI Trust

Trades Most Exposed at Caulking Work

Painters and exterior finishers, glaziers (window installation and repair), commercial carpenters, sheet-metal workers on roof flashings, building maintenance staff, demolition and renovation contractors, DIY homeowners performing window-replacement and exterior recaulking, stove-and-fireplace installation workers.

Jobsites in the Network Documenting Caulking and Sealant Use

  • Exterior and interior caulking on every commercial, institutional, and industrial building constructed before about 1980
  • Window-glazing work on every pre-1980 building with original wood-sash glazing
  • See companion pages: Asbestos Roofing, Joint Compound

Compiled from publicly filed asbestos litigation, EPA / OSHA records, and industry-publication histories. Product and company references reflect what has been alleged or documented in publicly filed litigation. This page does not constitute a finding of liability against any company. Not legal advice; consult a licensed attorney about your specific situation.