3M MW-1/4-48"-BLACK-12 PCS Adhesive Lined Heat Shrink Tube

12-piece adhesive-lined heat-shrink kit

This 3M kit contains twelve individual pieces of thin-wall polyolefin tubing, each 48 inches long and coloured black. The tubing carries an inner adhesive layer that bonds when heated, creating a moisture-resistant seal around the joint. It is designed for electrical insulation and strain relief on wire sizes from 16 AWG to 12 AWG.

For wire repairs needing environmental sealing

The adhesive lining suits installers who require a water-resistant barrier on automotive, marine or outdoor wiring harnesses. The 2.5:1 shrink ratio accommodates a range of connector shapes within the stated wire gauge window. Users needing a higher shrink ratio for larger connectors, a dual-wall construction, or a different colour code should look at alternative tubing types.

2.5:1 shrink ratio covers 16-12 AWG

The tubing shrinks from a 0.25 in inner diameter down to 0.08 in, with a 0.03 in recovered wall thickness, when heated to at least 275 °F. This single ratio determines whether the tube will fit over your connector and seal tightly on the target wire gauge. Verify the connector outer diameter against the 0.25 in supplied ID before ordering.