Dual Wall is designed to meet automotive industry requirements for environmental sealing and electrical insulation. It has a dual wall construction. The outer jacket is semi-rigid, radiation cross-linked polyolefin that is flame retardant and provides strain relief and abrasion protection. The inner layer is a unique hot-melt adhesive designed to adhere to all major automotive wire and terminal insulation. The adhesive forms an effective barrier against fluids and moisture;protects harnesses from corrosion and water wicking and covers a wide temperature range. This product is an OEM approved product.