3:1 Heatshrink

3:1 ratio heatshrink tubing (heat shrink) shrinks to one third of its original diameter — far more than standard 2:1 — making it ideal for sealing over connectors, lugs and irregular shapes. This range is adhesive glue-lined: as it shrinks, the inner glue melts and flows to form a fully waterproof, sealed joint. Ideal for marine, automotive and outdoor wiring where moisture protection matters. Available in black, single sizes and assorted boxes, with trade prices and UK delivery.