1.Acrylic adhesive provides excellent sealing qualities and good outdoor durability 2.This is a thicker version of 3M™ Extreme Sealing Tape 4411N 3.Highly conformable single-side acrylic tape with a high performance ionomer backing. 2.0 mm thick. 4.Creates water tight seals over numerous substrates. Conforms over contours, edges, rivets, and screw heads. Paintable and good outdoor durability.