3/32 inch heat shrink tubing fits 20–22 AWG wire — the size range used for thermocouple leads, LED strip wiring, small hook-up wire, and delicate sensor cables. At 2.4mm expanded diameter, this tube slides freely over 20–22 AWG conductors and shrinks to approximately 0.8mm after full heat recovery. The 3:1 adhesive-lined construction is the right choice here because fine wire is especially vulnerable to moisture wicking along the conductor strands — the hot-melt inner liner flows around the wire jacket and creates a capillary-blocking 360° waterproof seal that a 2:1 non-adhesive tube cannot provide. This size is particularly common in marine instrument panels and trailer lighting harnesses where 22 AWG signal wire runs through high-humidity environments.
Click any size to navigate · 60 ft per roll
ASIN: B0D64CCB8H · 3/32" (2.4mm) · 60 ft
Complete dual-wall adhesive performance in a bulk roll format. Permanently waterproof, 600V rated, and rated for the harshest environments.
Verify the expanded diameter is 20–30% larger than your wire or connector. The tubing must slide freely before heat is applied — if it drags, go one size up.
Cut to length and thread onto the wire or cable before making the splice or crimp. Overlap each terminal or connector end by at least 10mm for a proper seal.
Use a heat gun at 120°C or higher. Start at the center and work outward to push air toward the ends. Adhesive will appear at the tube ends — that is your visual seal indicator.
The tubing should be tight and uniform with adhesive visible at both ends. No gaps, lifting, or cold spots. Pull-test the finished connection to confirm the adhesive bond.
Seals LED strip connections, lamp socket splices, and lighting control wiring exposed to vibration or condensation. 3:1 ratio fits tight spaces.
Protects delicate instrumentation wiring from moisture ingress. Adhesive liner prevents capillary wicking along fine conductors.
Seals trailer connector repairs and small harness splices from road spray, salt, and standing water without special tooling.
Covers solder joints and wire-to-board connections where a watertight, flexible sleeve is required on a confined circuit board.
Used for insulation of thermocouple wire, RTD leads, and signal wiring inside outdoor or wash-down rated enclosures.
Protects under-dash splices, amplifier signal cables, and small connector terminations from moisture and abrasion.
High quality and amazing value for the price
I'll never buy individual bags of heat shrink tubing again. This is very high quality with a shrink ratio that is truly amazing (all of the tubing from this company is). I wonder if I'll be able to use this entire roll in 10 years!
Good quality and sealing heat shrink
Heat shrink works good. Bought this for work. Makes a nice sealed wire connection. Good quality, better than pre cut heat shrink, you can make whatever length you want.
I LIKE THIS!
I solder, and heat shrink, all of my automotive electrical connections. This is a great product, and I can cut it to any length. The price is great, and the shipping was fast!
Recovered diameter is approx. 1/3 of the expanded size shown · All sizes ship Prime USA & Canada
