Bertech 1 Mil Polyimide Tapes w/Acrylic Adhesive are made of 1 mil thick polyimide film with 1.5 mil thick acrylic adhesive. These tapes are reliable and durable with a unique combination of electrical, thermal, chemical, and mechanical properties that withstand extreme temperatures, vibration, and other demanding environments. High Temperature Masking Tapes are packaged on a 3" core and are 36 yards long. Custom sizes are available upon request. RoHS Compliant. Amber Color.