Quick view Add to Cart THERMAX Foil Tape THERMAX™ Aluminum Foil Tape is strong and durable, with an aluminum facer to match the aluminum facer of THERMAX™ Sheathing. Use THERMAX™ Aluminum Foil Tape to cover seams between foil-faced insulation boards to help... Dupont $36.79 Thermax Foil Tape (Silver) for Thermax Poly Iso Sheathing