Warmup DCM-PRO Waterproofing Tape - 120mm x 10m The Warmup DCM-PRO Waterproofing Tape is a vital component if you have chosen to use the Warmup system within a wet room .Supplied as a 120mm x 10 metre roll, this tape is easy to use, with an adhesive backing that applies securely to cover joins and prevent water ingress. Made to the highest of standards by the experts at Warmup, make sure you add this waterproofing tape to your basket when purchasing a Warmup underfloor heating system.