Ultratape extreme silicone tape 25mm x 3m ultratape 0822253bkclm p this extreme silicone tape from ultratape is ideal for plumbing and air ducts electrical connections radiators garden tools marine sport and tool grips a permanent instant air and moisture proof emergency tape it is the big brother to our successful sos tape and can be applied under water remains flame retardant and will insulate up to 8000v it is also wras approved and works in extremes of 50 to 260 deg c p ultr