GAMMA ELECTRONICS' SDL-DC-152 silicone cold shrink, for power cable connection applications with power cables, 6 in long. Gamma's SDL cold shrink is a specially formulated pre-expanded silicone rubber shrink tube that does not require heat to shrink. It is supplied expanded over an easily removable plastic cylinder. When the plastic cord is pulled, it allows the silicone tubing to shrink rapidly to seal and protect the connector, while gripping tight around the cable.