Monokote

Monokote is a brand of spray-applied fireproofing material originally manufactured by W.R. Grace & Company and applied to structural steel in commercial buildings, high-rises, and industrial facilities. Early formulations (notably Monokote-3, used roughly from the late 1960s through 1973) contained chrysotile asbestos, and later formulations were contaminated with tremolite asbestos from the Libby, Montana vermiculite mine. Reformulated, asbestos-free versions of Monokote remain in commercial use today.

Origin

The product was introduced by Zonolite Company, which was acquired by W.R. Grace in 1963. The name combines "mono" (single) with "coat," reflecting its marketing as a one-step sprayed fireproofing solution applied directly to steel beams and decking.

Significance in Asbestos Context

Monokote is a frequently identified exposure source for construction workers, insulators, ironworkers, electricians, plumbers, and laborers who worked in or around commercial buildings during construction, renovation, or demolition between the late 1960s and the 1990s. Because Monokote was sprayed overhead onto steel, overspray and later disturbance released fibers into breathing zones throughout entire buildings, exposing not only the applicators but every trade working nearby. The later use of Libby vermiculite is particularly important: tremolite asbestos is more potent for mesothelioma than chrysotile, and Libby-contaminated Monokote has been tied to disease in workers who never knowingly handled "asbestos" products. W.R. Grace's bankruptcy created a dedicated asbestos trust (the WRG Asbestos PI Trust) that pays claims for Monokote-related exposures, so identifying this product in a work history can directly support a trust claim.

Example Sentence

During his deposition, the retired electrician recalled the gray Monokote fireproofing being sprayed on the steel beams above him while he pulled wire on the upper floors of the office tower.

Related Terms

Libby Vermiculite, W.R. Grace, Chrysotile, Tremolite, Spray-Applied Fireproofing, Asbestos Trust

Notes

• If you worked in commercial construction, renovation, or demolition between roughly 1965 and 1990, ask your legal team whether Monokote may have been present at your job sites. Building permits, architect specifications, and union records can confirm it.
• The W.R. Grace Asbestos PI Trust accepts claims involving Monokote exposure; preserve any pay stubs, union dispatch records, employer lists, or photographs that place you at buildings where it was sprayed.
• Tell your doctor and lawyer if you recall a gray, cementitious, sprayed-on coating on overhead steel. This detail can distinguish Monokote from pipe insulation or joint compound exposures.
• Family members of applicators may have take-home exposure claims if asbestos-laden Monokote dust was carried home on work clothes.