For over 90 years, Tremco has been dedicated to making buildings safer for occupants by providing complete building envelope protection solutions against fire, water, sound and air — from the foundation to the roof. The TREMstop® fire protection line features sealants, intumescents, field-fabricated devices and forming material with hundreds of independently tested fire-rated systems for penetrations and joints. And Willseal, providing precompressed, watertight and energy efficient joints with 1-, 2-, and 3-hour fire-rated seals.