High Barrier Venting Tape Product Features • The excellent barrier against foam leakage makes this tape a best seller in the market • A certain air permeability allows the foam to expand while the tape will cover venting holes • Is highly conformable to shaped structures • Unwinds gently to avoid curling which makes the handling easier in order to reduce process time • Easily torn by hand for an increased working efficiency • Ageing-resistant design • Certification according to UL 94 HB flame rating tesa® 4576 is a single-sided tape for venting applications. It is based on a nonwoven fabric coated with acrylic adhesive. The selected backing ensures conformability and gives certain air permeability. It is an ideal barrier for your foaming processes.