3M™ Polyurethane Protective Tape 8663 is an erosion protection tape and primarily used on aircraft leading edges such as vertical stabilizers. It is constructed of a polyurethane backing coated with a long-aging, solvent-resistant, pressure sensitive adhesive that is protected with a transparent easy-release liner. - 3M polyurethane protective tape 8663 is an erosion protection tape and primarily used on aircraft leading edges such as vertical stabilizers. It is constructed of a polyurethane backing coated with a long-aging, solvent-resistant, pressure sensitive adhesive that is protected with a transparent easy-release liner.