Dual Wall Heat Shrink

3:1 dual wall heat shrink does two jobs at once: the outer wall shrinks to a third of its size to insulate the join, and the adhesive inner liner melts to seal it. That makes it a good fit for trailer wiring, marine work and anything that sits in the weather. It is sold per metre and cut to the length you order.

Sizes

Common questions

What does 3:1 mean?

The tubing can shrink to one third of its supplied diameter. Pick a size that slides over the widest part of the join, and it will shrink down far enough to grip the wire on either side.

Single wall or dual wall?

Dual wall has an adhesive liner that seals the join, so choose it for anything exposed to moisture. Single wall only insulates.

See the full heat shrink tubing range.

Bulk pricing

Buy 5 to 9 packets for 10% off each packet, or 10 or more for 20% off each packet. The discount applies at checkout, there is no minimum order, and orders placed before 12pm are dispatched the same day.