Tri-Seal Lined Caps
By Mold-Rite PlasticsWhite polypropylene screw caps have smooth top and side. The Tri-Seal (F-217) lining (vinyl coating over a spongy material) gives a better seal than linerless caps.
White polypropylene screw caps have smooth top and side. The Tri-Seal (F-217) lining (vinyl coating over a spongy material) gives a better seal than linerless caps.