Helixal — Professional Heat Shrink Tubing
5/8 inch heat shrink tubing fits 1/0 and 2/0 AWG cable — the large-conductor range used for marine battery banks, main bus bar feeds, large car audio system power cables, and RV inverter wiring. At 16mm expanded diameter, this tube slides freely over 1/0–2/0 AWG conductors and shrinks to approximately 5.3mm after full heat recovery. Cables at this size carry 150 to 200+ amps and the adhesive-lined 3:1 construction is essential — the inner liner locks to the cable jacket and lug shank to prevent electrolytic corrosion at high-current crimp terminations exposed to bilge moisture or engine-bay heat cycles. For indoor dry-area panel wiring where waterproofing is not required, the 2:1 standard is a lower-cost option in the same size. The 5/8" size is the standard for main positive and negative cable terminations on marine battery banks and dual-battery systems.
Click any size to navigate · 30 ft per roll
ASIN: B0D647X6FS · 5/8" (16mm) · 30 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 battery terminal connections in marine, automotive, and RV systems. Adhesive provides mechanical strain relief on large lugs.
Protects high-current winch and anchor windlass wiring from submersion, vibration, and repeated flexing in off-road and marine use.
Used on shore power inlet wiring, generator output connections, and main bus bar terminations on vessels and dockside equipment.
Seals amplifier power feed terminations and large speaker cable connections from moisture in marine and car audio builds.
Provides insulation and mechanical protection on heavy equipment cable terminations and welding lead connections.
Seals bus bar connections, large lug terminations, and cable entry points on industrial switchgear and distribution panels.
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 to USA & Canada
