Product Description
DAP (originally Dicks-Armstrong-Pontius, later DAP Inc. / DAP Products) was allegedly a major U.S. supplier of consumer and contractor-grade sealants, caulks, and roof coatings sold through hardware wholesalers, roofing distributors, and home-center retailers. Plaintiffs have alleged in publicly filed U.S. asbestos personal-injury and wrongful-death litigation that DAP’s trowel-grade asphalt roofing cement, flashing cement, and “plastic cement” allegedly incorporated chrysotile asbestos fiber as a reinforcing filler that gave the cement its thixotropic non-slump body, ability to bridge cracks, and adhesion to metal flashings and aged asphalt substrates.
According to publicly filed asbestos litigation records, asbestos-containing DAP roofing and flashing cement was allegedly sold in cans, pails, and cartridge tubes from roughly the 1950s until federal and state asbestos-in-consumer-products reforms drove reformulation by around 1980.
Workers Exposed
- Roofers troweling DAP plastic cement into flashing details, penetrations, and blister patches
- Sheet metal workers bedding curbs, counterflashings, and gravel stops in asbestos-fibered cement
- Building maintenance and property-management crews performing roof leak patch work
- HVAC installers sealing rooftop equipment curbs and penetrations
- Handymen and DIY homeowners troweling roof cement — with take-home dust exposure to family members