Helixal — Professional Heat Shrink Tubing
1-1/2 inch heat shrink tubing is designed for very large cable assemblies, industrial conduit terminations, large pipe identification, and heavy-duty cable bundle end sealing where maximum coverage diameter is required. Typical applications include sleeving over large shore power cable assemblies, sealing industrial motor feeder entries at weatherproof enclosures, and covering cable tray exits through fire-rated walls where 38mm bore is the minimum workable dimension. At 38mm expanded diameter, this tube accommodates large cable bundles and multi-conductor assemblies and recovers to approximately 12.7mm after full heat application. The 3:1 adhesive liner is critical at this size — it provides the conforming seal around large, non-circular cross-sections when multiple cables are covered simultaneously, flowing into voids that a non-adhesive sleeve cannot seal. For dry indoor conduit end-cap or labeling applications where waterproofing is not required, the 2:1 standard is a lower-cost option in this size. The 1-1/2" size is the standard for sealing conduit risers, protecting cable entry points on outdoor switchgear, and covering large pipe-and-cable assemblies in process plant environments.
Click any size to navigate · 20 ft per roll
SKU: B0D649MTCL · 1-1/2" (38mm) · 20 ft
Complete dual-wall adhesive performance in a bulk roll format. Permanently waterproof, 600V rated, and rated for the harshest environments.
Sizing over a connector? The Wire Gauge row above is for bare conductor. Heat shrink must be sized to the widest point it passes over, so a crimped butt splice or lug barrel needs a larger tube than the wire alone — a 22–18 AWG splice barrel measures 5–6mm, a 16–14 AWG barrel 7–8mm, and a 12–10 AWG barrel 9–11mm. Measure the barrel, allow about 20% clearance, and confirm the recovered diameter is smaller than the narrowest thing the tube must grip. Use the size calculator.
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!
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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.
Actual 1-1/2" tube at full expanded diameter (38mm) and after heat recovery. Use this as your fit reference before cutting.
Seals the entry point of cable bundles through bulkheads, firewalls, and conduit fittings against moisture, dust, and vapors.
Provides insulation and end sealing on large industrial conductors in switchgear, motor control centers, and distribution equipment.
Seals conduit ends and cable transition points in outdoor electrical installations against water ingress and UV degradation.
Color-codes and mechanically protects large pipe, hose, and cable assemblies in process plants, mining, and heavy industry.
Provides a degree of flame barrier at bulkhead and firewall penetrations for large cable bundles in industrial and marine applications.
Applied at panel entry and exit points to distribute bending stress and prevent jacket damage on large-diameter industrial cables.
Recovered diameter is approx. 1/3 of the expanded size shown · All sizes ship to USA & Canada
