Ultratape Rubawrap Waterproof Self-Amalgamating Tape 25mm x 5m Black. Rubawrap is a strong, self-amalgamating, syntheticelastic tape possessing excellent high voltageproperties, ozone resistance, water resistance, andthe ability to protect against erosion. There is noright or wrong side to Rubawrap tape, no silkyadhesive to pick up foreign matter or to tangletogether during application in close clearances. Seal, Protect, Insulate, Connect, Bonds to itself to form seamless Waterproof, Airtight layer Ref: UTWI1827