225pc Assorted Adhesive Lined Heat Shrink Tubing Box - Black 3:1, 3mm to 18mm

225pc Assorted Box of Adhesive Lined Heat Shrink Tubing - 225 black 3:1 dual wall heatshrink sleeves in six diameters from 3mm to 18mm, supplied as 40mm pre-cut pieces.

Adhesive lined tubing has a layer of hot melt glue on the inside. As the sleeve shrinks the adhesive softens and flows into the gaps around the wire and the terminal, then sets as it cools, so the joint comes out sealed rather than just covered. That is the difference that matters on anything exposed to weather, washdown or salt - a plain sleeve keeps splash off but water still travels along the wire underneath it, while a sealed joint does not. The 3:1 ratio also pulls down further than standard tubing, so each size copes with a bigger step between the wire and the terminal body.

Box contents (225 pieces total)
60 x 3mm, shrinks to 1mm
74 x 4.8mm, shrinks to 1.6mm
45 x 6mm, shrinks to 2mm
25 x 9mm, shrinks to 3mm
15 x 12mm, shrinks to 4mm
6 x 18mm, shrinks to 6mm

Type
Black adhesive lined dual wall heatshrink tubing, 3:1 shrink ratio, 40mm pre-cut lengths

Approval
UL 224 VW-1 flame retardant

Please note
Every piece is a 40mm length, sized for terminals and joints rather than for sleeving a run. Adhesive lined tubing needs more heat than plain tubing - keep the gun on it until a small bead of adhesive appears at each end, which is how you know the glue has flowed and the joint is sealed. Stopping as soon as the sleeve looks tight is the usual reason a dual wall joint leaks.

Suitable for
Sealing crimp terminals and soldered joints against water, marine and boat wiring, agricultural and plant electrics, trailer, towing and caravan wiring, exterior lighting and sensor repairs, chassis and underbonnet looms

Also known as adhesive lined heatshrink, dual wall heatshrink, glue lined heat shrink, waterproof heat shrink, 3:1 heatshrink, or a marine grade heat shrink assortment box.