Cold Shrink Technology

Simplifying Jointing and Terminating with a classic solution

The essence of Cold Shrink technology is its classic simplicity - it moulds round a joint or termination under its own elasticity without the need for special tools or techniques.

Its secret lies right inside every 3M Cold Shrink component in the form of a plastic coil. After the component has been placed over the joint or cable end, this inner spiral is pulled out. The insulating tube then contracts from its pre-stretched size and shrinks onto the cable, exerting permanent radial pressure for the lifetime of the joint.

The simplicity of design is matched by the complexity of the research that has 3M has put into the material developments over the last three decades.

Silicone rubber is today’s choice for 3M. It is hydrophobic, or averse to water - particularly important in outdoor terminations. Water on the surface forms droplets rather than spreading into an even film that can increase the chances of tracking or insulation breakdown. Silicone is mostly inorganic, so leakage currents or arcing on the surface do not create a conducting carbon path. As an additional safe guard, 3M uses track-resistant filler. Silicone is UV-stable without the need for inhibitors while its smooth surface provides minimal grip for contaminants so rain will wash them away.

Consistent Quality

The advanced materials used in 3M Cold Shrink technology mean that insulation retains its flexibility throughout the life of the cable. Since the insulating material settles round the joint after fitting, there are no voids to encourage corona discharge inside the cold shrink component.

First Choice for Contractors

3M Cold Shrink Technology is based on the properties of the special silicone elastomers that 3M has researched and developed over the last three decades. In that time, performance has risen, cost has dropped and 3M Cold Shrink is increasingly the contractors’ first choice.