Products in this category feature a liner on the back which you peel away from to expose the adhesive material before applying to the substrate. The liner material for this product is composed of polyethylene. 3M 666 clear bonding tape comes in acrylic adhesive. The variances in thickness often make an important difference in proper performance. This bonding tape has a 3.8 Mil thick. Good adhesive anchorage to the film carrier provides one piece tape removal from many surfaces.