4ft x 10ft 1/4 white foam radiant barrier EXTREMELY EFFECTIVE – reflect 97% of radiant energy, perfect RADIANT BARRIER. SOUND BARRIER – excellent soundproofing material. VAPOR BARRIER – Unaffected by humidity and moisture, mold resistant , can be used outdoor/indoor. EXCELLENT FINISH – Clean White finish, requires no painting, No additional insulation required. SUPREME QUALITY – 5 mm closed-cell polyethylene foam, laminated with 99% aluminum foil on one side and a polyethylene film printed with UV ink that provides insulation and beauty to your buildings. FIRE RATE – Fire rate Class 1 / Class A, NON TOXIC – will not irritate skin, eye or throat. Non allergic.