3M polyimide film tape 5413 with DuPont Kapton polyimide film and silicone adhesive used for PCB solder masking and other high temperature applications. This product is amber colored and 2.7 Mil thick. It is flame retardant, chemical and radiation resistant which helps protect surfaces to help reduce replacement costs. - The DuPont Kapton polyimide film does not soften at elevated temperatures, thus the film provides an excellent release surface at elevated temperatures. 'It is dimensionally stable at high temperatures, which helps reduce rework, helping to enable high productivity.