This reflective foil insulation consists of two layers of polyethylene bubble film sandwiched between two layers of 99.9% pure aluminum foil making it 5/16" thick. Temperature range from 60° F to 180° F. Works great for insulating headliners floor pans trunk area door panels kick panels etc. Cut and form into needed shapes using scissors and apply with contact cement or weatherstrip adhesive. 72" × 48".