All Service Jacket Insulation is laminated 5 layers of structure, the outer layer is Aluminum foil and White Kraft paper. 

The middle layer is the Glass fiber layer double side coated with Flame-retardant adhesive, All Service Jacket Insulation increased tensile strength of All Service Jacket Insulation, and the Aluminum foil and White kraft paper are firmly bonded.

ASJ Insulation Jacket is a special FSK insulation facing turned inside-out, exposing white, bleached kraft paper. The industry also has several tapes and mastics available to match the white kraft paper, and ensure the appearance of the ASJ facing remains crisp and seamless.