3M 4941 is a 45 mil, VHB™, double-coated adhesive foam. It is one of two 3M VHB™ core go-to items. 4941 is the main product when conformability is necessary. 3M's other go-to item when internal strength is more important than conformability is 4950. The 4941 family utilizes multi-purpose acrylic adhesive on both sides of a conformable foam. It has excellent adhesion to a broad range of high and medium surface energy substrates including metals, glass and a wide variety of plastics and plasticized vinyl. In many cases 4941 can replace rivets, spot welds, liquid adhesives or other permanent fasteners. This product is available with a Poly liner as 4941F.