Thin and conformable, our 3M™ Polyester Tape 8991 is a general purpose tape that excels in high temperature masking operations such as powder coat painting. Coated with a silicone adhesive, this tape bonds to a variety of difficult surfaces. It is chemical resistant and performs under a wide range of temperatures and environments.
Effectively Mask in High Temperature Applications 3M™ Polyester Tape 8991 is a general purpose polyester tape ideal for masking in high temperature applications. Coated with a silicone adhesive, this tape functions well in masking for powder coating and anodizing to provide sharp paint lines. It removes cleanly and in one-piece from most surfaces, avoiding slivering and breaking. With good chemical resistance, this tape works effectively in chemical processes and demanding work conditions, such as anodizing. The pressure sensitive silicone adhesive performs under a broad range of temperatures ranging from -60°F (-50°C) to 400°F (204°C). Recommended applications: - Masking parts for high temperature powder coat painting - Holding parts or vacuum bags during composite bonding operations - Masking metal surfaces in acid or caustic chemical milling baths - Protective tape reduces scratches during handling and shipping Key characteristics: - Works in demanding conditions and high temperatures ranging from -60ºF (-50ºC) to 400ºF (204ºC) - Clean removal during high-temperature masking operations such as powder coating - Polyester film offers excellent thermal and chemical resistance while maintaining flexibility - Silicone adhesive provides clean removal from a variety of surfaces - Translucent blue backing provides easy identification and positioning