Where tensile strength is a requirement, you can't do better than a glass cloth backing. This type of backing can have tensile properities seven times high than typical polyester.
White, 7.5 mil (0.14 mm) glass cloth tape with silicone adhesive. High temperature resistance, high adhesion, and a very strong, abrasion resistant backing. Excellent choice for masking protection in thermal spray operations.
Brown, 5.3 mil (0.134 mm) glass cloth tape impregnated with PTFE and silicone adhesive. 5451 is a heat seal tape. Provides a high tempeature release surface for protection and insulation such as the bar underneath where the hot wire seals plastic film.
Brown, 8.3 mil (0.21 mm) glass cloth tape impregnated with PTFE and silicone adhesive. 5453 is a heat seal tape. Provides a high tempeature release surface for protection and insulation such as the bar underneath where the hot wire seals plastic film.