Use Fire Block Flame-Retardant Spray to keep your school events and students fire-safe. Spray it on most materials, including fabric, wood, carpet, and boxes. Fire Block has been tested to be compliant with NFPA 225 & ASTM-E84 tests for flame spread and smoke development values by SGS US testing for Class A materials. It is also tested to be compliant to NFPA701 for textile fabrics. Fire Block comes with bottle and sprayer. Weighs 2.5 pounds.