3M(TM) Vinyl Foam Tape 4504 Black, 1/2 in x 18 yd, 18 per case 3M(TM) Vinyl Foam Tape 4504 Black, 0.250 inch (6.0 mm) closed cell vinyl foam with acrylic adhesive. 3M(TM) Vinyl Foam Tape 4504 0.250 inch (6.4mm) thick black, high-density, closed cell foam with pressure sensitive acrylic adhesive. A 0.003 inch (0.08mm) thick white, silicone treated paper liner is applied to the non-adhesive side of the foam so the PVC can be cut to length and applied while leaving the liner in place.