Self-Amalgamating Tape 25mm x 5m Black - Rubawrap

Rubawrap is a strong, self-amalgamating, synthetic elastic tape possessing excellent high voltage properties, ozone resistance, water resistance, and the ability to protect against erosion. There is no right or wrong side to Rubawrap tape, no silky adhesive to pick up foreign matter or to tangle together during application in close clearances. Seal, Protect, Insulate, Connect, Bonds to itself to form seamless Waterproof, Airtight layer

This is a viable alternative to some more expensive versions made by other well known brands.