DEI Reflect-A-Cool 3ft x 4ft SheetReflect A Cool(TM) solves the problem of heat intrusion into interiors and components. Reflect A Cool(TM), constructed of fiberglass material backed with a layer of aluminized reflective foil to handle direct continuous temperature of 400F has many uses such as covering firewalls, marine engine compartments, RVs, in the tub of a race car where typical mechanical fasteners cannot be used and has many industrial uses. Reflect A Cool(TM) can be trimmed