Bertech 2 Mil Polyimide Masking Tapes are made of 2 mil thick polyimide film with 1.5 mil thick silicone 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. They have been used in applications at temperatures as low as -73°C (-99°F) and as high as 260°C (500°F). Polyimide Masking Tapes are packaged on a 3" core and are 36 yards long. RoHS and REACH Compliant.