Heat Shrink Butt Connector Kit

A crimp is a metal barrel squeezed onto the strands. This melts a ring of solder into them, so the two wires become one piece of metal. Then the sleeve shrinks down and seals over the joint. There is nothing to work loose under vibration.

No. Strip the wires, push them in from each side, and apply heat. No crimper, no die set, no soldering iron and no experience with a soldering iron.

Yes. A heat gun is the easiest to control, but a lighter or even a hot air gun will do it. Keep the flame moving around the sleeve rather than holding it on one spot, and stop once the solder has flowed and the tubing has drawn in tight.

Yes, once both ends are properly heated. The sleeve is lined with adhesive that melts and seals against the wire insulation at each end, so there is no open path for water to wick in. That is what makes it suitable for boats, trailers and outdoor lighting.

The colours are sized by wire gauge:

• White — 26–24 AWG
• Red — 22–16 AWG
• Blue — 16–12 AWG
• Yellow — 12–10 AWG

10 AWG is the largest wire these will take.

Yes. Copper, aluminium, solid or stranded, and joints between two different wire types all work.

Yes, keeping a sensible distance from exhaust pipes, manifolds and the turbo. The sealed joint is built for heat cycling, vibration and damp, which is where an unsealed crimp tends to corrode first.

3–5 business days in the USA, and 7–10 business days everywhere else.

If you are not completely satisfied, we will make it right. Every SolderStick product is covered by a 30-day money-back guarantee, and our support team is there if you need them.