3M polyester tape 8403 is a thicker polyester tape designed for easy handling and more durability. It is ideal for masking in high temperature applications and adheres well to silicone coated surfaces. The tape has a silicone adhesive that functions well for masking and removes cleanly, in one-piece, from most surfaces. This tape also excels in permanent splicing operations on silicone liners, papers and films subject to high temperatures. - 3M polyester tape 8403 has a silicone adhesive for composite bonding and splicing of many silicone coated papers and films. The tape has a silicone adhesive that functions well for masking and removes cleanly, in one-piece, from most surfaces.