3M™ Polyimide Film Tapes with DuPont™ Kapton® polyimide film and silicone adhesive used for PCB solder masking and other high temperature applications:

• does not soften at elevated temperatures, thus the film provides an excellent release surface at elevated temperatures
• The silicone adhesive's high temperature performance reduces adhesive transfer which helps to eliminate cleaning, enabling high productivity

3M™ Circuit Plating Tapes with polyester film and blended silicone and rubber adhesive used for PCB masking and other high-temperature applications.

The 3M brands listed above are trademarks of 3M. Kapton is a registered trademark of DuPont. 

https://www.3m.co.uk/3M/en_GB/p/d/b10151131/