1 Mil Kapton Masking Tapes are made from Kapton® film with silicone adhesive. They have been used in applications at temperatures as low as -269°C (-452°F) and as high as 230°C (446°F). DuPont™ Kapton® Polyimide Films have set the industry standard for over 45 years in high performance, reliability and durability, with a unique combination of electrical, thermal, chemical and mechanical properties that withstand extreme temperatures, vibration, and other demanding environments. Kapton® Tapes have a high dielectric strength. The silicon adhesive protection leaves no residue. Also available in 2 mil and 5 mil thickness.