Better than electrical tape by far!
Used this on vehicles (starters) and trailer lights. Easy to use, looks like a professional fitting, and seems to hold tight.
Verified Buyer · Verified Buyer★ Verified
Dual-Wall · Adhesive Lined · 10ft Packs
3:1
Short Packs
Helixal 3:1 ratio heat shrink tubing with adhesive lined dual wall construction — in 10ft rolls. Try a size before buying bulk. Handle spot repairs without storing excess. Stock every diameter you need.
★★★★★4.7 · 225 verified ratings across the Helixal range
In Stock · Ships in 24h
Size
$7.39per spool
→ Dispatched within 24 hours — delivered in 1–3 days→ 30-day money-back guarantee — 30 days to return it
→Ships USA & Canada
→Bulk pricing
→ISO 9001
Spec Sheet
The
data sheet.
Every value is per-lot tested. Spec sheet matches catalog matches lab. No marketing variance.
Shrink Ratio
3:1
Nominal (min 3.0:1)
Wall Construction
Dual Wall
Polyolefin outer + adhesive inner
Inner Layer
Hot Melt Adhesive
Flows at 120°C (248°F)
Temperature
-55°C / +125°C
Continuous rated
Voltage Rating
600V AC
UL 224 — 600 V rms
Shrink Temp
100°C (212°F)
Shrinking starts
Adhesive Flow
120°C (248°F)
Keep heating until it shows
Material
Polyolefin
Flame retardant
Color
Black
UV resistant
Standards
UL 224 Recognized
UL file E361230 · RoHS
Flammability
Self-extinguishing
Per UL 224
Roll Length
10 ft per size
All 13 sizes
What the
trade says.
Verified Buyers ★ · Full Range4.7★★★★★225 ratings · 84% 5-starCombined verified-buyer rating for every Helixal product — all ratios, all sizes — not this size alone.
Good quality and sealing heat shrink
Heat shrink works good. Makes a nice sealed wire connection. Better than pre-cut heat shrink — you can make whatever length you want.
R Davis · Verified Buyer★ Verified
Smart format for repair work
Great for keeping several sizes on hand without the bulk. Same quality as the large rolls — the adhesive seals perfectly every time.
Travis M. · Marine Technician★ Verified
Customer Reviews
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Shop by Size
ALL 13 SIZES
How it shrinks.
01
Measure
Cut tube 20–30% longer than the area to cover. Tubing contracts slightly in length as well as diameter when heated.
02
Slide Over
Thread tubing over the wire or component before making the splice. It cannot be fitted after the connection is made.
03
Position
Center the tube over the joint, leaving at least 20mm of coverage past the connection on each side.
04
Heat & Seal
Apply even heat with a heat gun until the tube contracts fully and adhesive flows from both ends — confirming a watertight seal.
Use it on.
01
Marine Repair
Emergency on-board wire repair, single connector sealing, bilge sensor protection, and navigation light terminal work.
02
Automotive
Single harness repairs, trailer hitch connector sealing, battery terminal protection, and classic car restoration across multiple gauges.
03
Size Testing
Order 10ft in two candidate sizes, test them on your connector, then commit to the large roll in the size that fits.
04
Spot Repairs
A repair needs 6 inches. A 10ft roll is manageable — use what you need, store the rest in a tool bag. No excess shelf stock.
05
Multi-Size Kit
For the same price as one large roll, stock five or six different diameters — every connector you encounter, covered.
06
DIY & Hobbyist
Home electronics repair, maker projects, and low-volume professional installs where a large roll would go to waste.
Technical Guides
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