Handi-Foam E84 Class 1(A) low pressure spray polyurethane foam is a two-component system designed to fill and insulate large voids and surfaces. Handi-Foam E84s excellent adhesion properties create a continuous air barrier. This quality completes the building envelope, resulting in improved indoor air quality and lower heating and cooling costs. Handi-Foam E84 is a Class 1(A) fire rated foam that meets various building code requirements for insulation.