Poly Glas 76830 is an electrical grade, parallel glass banding tape, impregnated with an uncured, high temperature, modified polyester resin. During cure, resin flow fills voids and air spaces, producing a homogeneous laminate, with a smooth resin rich surface. - Glass bonding is a commonly recognized replacement for steel wire banding on DC armatures and commutators. This smooth surface reduces the collection of dirt which might otherwise lead to tracking failure. The thermosetting modified polyester resin provides excellent arc resistance and minimizes flashover.