Greenfire - Pro Defense Foam - 5 Gallons thermal runaway 4LR™ technology provides lightweight support

4LR™ technology provides lightweight support and stability

Crafted to shield you without sacrificing warmth or style

Designed with advanced technology and a robust structure

Our thermohydrometers are built to meet the stringent API specifications

Greenfire - Pro Defense Foam - 5 Gallons thermal runaway 4LR™ technology provides lightweight supportIntroducing Greenfire Pro Defense Foam, a professional grade expanding foam engineered for precise sealing, insulation, and protective barriers in demanding environments. Packaged in a 5 gallon container, it's built to power large scale projects with reliable yield and consistent performance. From the trusted GREENFIRE brand, Pro Defense Foam delivers industry leading adhesion, airtight seals, and durable results that safety professionals rely on.