3M™ Polyester Tape 8991 is available in a variety of sizes

Meets the Demands that Come with High-Temperature Applications
3M engineered 3M™ Polyester Tape 8991 as a pressure-sensitive silicone adhesive that grabs on contact and offers high heat resistance, reducing failure due to softening, oozing and adhesive transfer. This high-temperature tape is also designed with a thin polyester backing that resists shrinking, curling, tearing and edge lifting, offering reliable masking and consistent results. With a 1.0 mil polyester backing and 1.4 mil silicone adhesive, this tape features sharp, clean paint lines and provides excellent thermal, abrasion and chemical resistance while maintaining flexibility. In addition, 3M™ Polyester Tape 8991 removes without leaving behind adhesive residue, for a clean finish. 3M Polyester Tape 8991 performs up to 400°F/204°C and adheres well to tough-to-stick-to surfaces like silicone liners and fixtures coated with mold release.

Recommended Applications
3M™ Polyester Tape 8991 (PDF, 170.7 Kb) can be used in many applications, including:

• Masking in e-coating, electroplating and anodizing
• Masking for powdercoat painting
• Flashbreaker tape when pulling through cured coating such as epoxies
• Holding material, securing parts and sealing of vacuum bags during autoclave processes
• Splicing, tabbing and roll closing difficult-to-stick surfaces such as silicone treated liners

Ready for High Temp Challenges
When you need a strong tape that will deliver reliable masking and sharp, clean paint lines in high-temperatures, 3M Polyester Tape 8991 is an exceptional choice. For optimal results for many applications, 3M™ Polyester Tape 8991 provides the strength, durability and clean finish you've come to expect from 3M tapes.