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 Purchase★ Verified
3:1 Dual Wall · 10ft Short Pack
5/8"
3:1 Heat Shrink
Fits1/0–2/0 AWG16mm
5/8 inch heat shrink tubing fits 1/0–2/0 AWG battery cable and slips over the crimped lug barrels used on 4–2 AWG. ABYC E-11 Table XI rates 1/0 AWG at 125A and 2/0 AWG at 150A — inverter feeds, battery bank interconnects, and audio amplifier mains. At 16mm expanded, it clears bare 1/0 and 2/0 conductors and recovers to about 5.3mm. Because the tube must pass over the lug palm as well as the barrel, measure the widest point and allow 20% clearance; if it drags going on, step up a size rather than forcing it. The hot-melt liner flows at 120°C and fills the step between the lug shoulder and the cable jacket, which is precisely where corrosion starts on a battery bank. UL 224, 600V, -55°C to +125°C. A 10ft pack terminates a typical four-battery bank with cable left over.
★★★★★4.7 · 225 verified ratings across the Helixal range
21 in stock · Ships in 24h
Order up to 21 online · need more? Trade pricing
Size5/8" · 16mm
Click any size to navigate · 10 ft per roll
$9.2910 ft spool
→ Dispatched within 24 hours — delivered in 1–3 days→ 30-day money-back guarantee — 30 days to return it
Qty
1
Secured by Stripe · No account needed
→Ships USA & Canada
→ISO 9001
→Ships 24h
SKU: B0FJNGC6PG · 5/8" (16mm) · 10 ft
Spec Sheet
5/8"
data sheet.
Full industrial dual-wall adhesive spec in a convenient 10ft pack. Same 600V rated, waterproof polyolefin construction as the large bulk rolls.
Imperial Size
5/8"
Expanded diameter
Metric Size
16mm
Nominal
Roll Length
10 ft
Per spool
Wire Gauge
1/0–2/0 AWG
Bare conductor
Shrink Ratio
3:1
Dual wall
Construction
Dual Wall
Adhesive inner liner
Inner Layer
Hot Melt Adhesive
Waterproof seal
Voltage Rating
600V AC
UL 224 — 600 V rms
Temp Rating
-55°C to +125°C
Continuous service
Shrink Temp
100°C (212°F)
Shrinking starts
Adhesive Flow
120°C (248°F)
Keep heating until it shows
Material
Polyolefin
Outer sleeve
Flammability
Self-extinguishing
UL 224 Recognized
Color
Black
Standard finish
Standards
UL 224 Recognized
UL file E361230 · RoHS
UV Resistance
Yes
Outdoor safe
Waterproof
Yes — adhesive seal
360° coverage
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.
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 Purchase★ 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. · Verified Purchase★ Verified
Customer Reviews
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Sizing & Application — 5/8 inch, 10ft pack
Eight lug ends on a four-battery bank, and every one of them fails in the same place.
5/8 inch (16mm) clears bare 1/0–2/0 AWG cable and the crimped lug barrels used on 4–2 AWG. ABYC E-11 Table XI rates 1/0 AWG at 125A and 2/0 AWG at 150A. A four-battery bank has eight interconnect ends plus the main positive and negative — ten terminations, about three feet of tubing, and one shared weak point that decides how long the bank lasts.
The lug shoulder, and why 3:1 is the ratio that reaches it
On every one of those terminations the same geometry repeats: a wide crimped barrel, then an abrupt step down to a much narrower cable jacket. Corrosion on a battery bank does not start on the palm or in the middle of the cable. It starts in that step, because it is the one place a tube can be present without being in contact.
A 2:1 tube at this size recovers to about 8mm. If the jacket is thinner than that — and on 2 AWG it is — the tube stops shrinking when it meets the shoulder and tents across the gap. The finish looks correct and there is a void underneath, and the void collects exactly the electrolyte the tube was fitted to exclude.
This tubing recovers to about 5.3mm, roughly a third, and carries hot-melt adhesive behind the wall. The extra closure pulls it down the step and the adhesive fills whatever remains. Heat from the lug end toward the cable so air escapes ahead of the shrink front and the adhesive is driven down the joint, and stop when a bead appears at the cable end.
5/8 inch short pack at a glance
| Property | Figure | Why it matters |
|---|---|---|
| Expanded diameter | 16mm (5/8") | Clears bare 1/0–2/0 and lug barrels on 4–2 AWG |
| Recovered diameter | ≈5.3mm | Roughly a third — follows the lug-to-jacket step |
| Bare cable range | 1/0–2/0 AWG | 125A for 1/0, 150A for 2/0 (ABYC E-11 Table XI) |
| Four-battery bank | ≈10 terminations, ≈3 ft | One pack does the bank with cable to spare |
| Measure at | The lug palm, not the barrel | The palm is normally the widest point to clear |
| Bulk equivalent | 30 ft roll | Three banks — installer stock rather than owner stock |
A bead of adhesive at the cable end is the seal indicator. Without it the liner has not flowed through the full wall thickness.
When 5/8 inch is not the size
01 · The lug is on 1/0 or larger
Barrel and palm together commonly exceed 19mm, past a 16mm bore. Move to the 3/4 inch pack and confirm the recovered 6.4mm still grips your jacket.
02 · You are covering bare cable only
With no termination in the way, check whether 1/2 inch clears the jacket first. The smaller tube grips harder and costs less.
03 · The bank is in a dry conditioned room
Where nothing wet reaches it, the 5/8" 2:1 does the bundling and identification at a lower cost per foot.
04 · Above 600V
We hold 600V rms. On 1000 Vdc and 1500 Vdc DC the conductor must already be rated and tubing covers rather than insulates.
Keep reading →3/4" 3:1 Dual Wall — 10ft pack for larger lugs · Heat Shrink for Battery Terminals · Marine Heat Shrink Tubing
How it shrinks.
01
Measure & Select
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.
02
Cut & Thread
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.
03
Apply Heat
The tubing starts shrinking at 100°C, but the adhesive liner only flows at 120°C — so keep the heat gun moving past the point where it looks shrunk. 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.
04
Inspect
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.
Size ReferenceExpanded vs.
Expanded vs.
recovered.
Actual 5/8" tube at full expanded diameter (16mm) and after heat recovery. Use this as your fit reference before cutting.
Expanded: 16mm — slides over 1/0–2/0 AWG
Shrink ratio: 3:1 on full heat
Use it on.
01
Try Before You Buy Bulk
Order a 10ft pack to verify the size fits your connector before committing to a large roll. Test fit, shrink one piece, then buy the bulk roll with confidence.
02
Field Repair Kits
Keep a set of short rolls on the service van or boat. Enough for any repair job without hauling large rolls — one 10ft roll handles most splices.
03
Stock Multiple Sizes Cheap
For the same cost as one large roll, stock several different sizes in short packs. Covers more connector diameters for the same investment.
04
Marine & Outdoor Spot Repairs
Seals individual connections on boat wiring, outdoor electrical, and trailer harnesses. Same waterproof adhesive seal as the large rolls — just 10ft.
05
Low-Volume Production
Ideal for small-batch cable assembly and prototype builds where a full bulk roll would sit unused. Cost-effective for runs of fewer than 50 connections.
06
One-Off Automotive Builds
Custom automotive and motorcycle builds often need several sizes in small quantities. Short rolls let you match every connection without leftover material.
Size Guide
5/8" Questions.
Technical Guides
All Guides →From the Blog
Free Tool
Heat Shrink Size Calculator
Read Guide →Ratios2:1 vs 3:1 vs 4:1 Heat Shrink Ratio Guide
Read Guide →Complete GuideHeat Shrink Tubing: The Complete Guide
Read Guide →SizingSize Chart & Selection Guide
Read Guide →How-ToHeat Shrink for Battery Terminals
Read Guide →AutomotiveAutomotive Wire Protection Guide
Read Guide →Also available — 5/8" in other lines
All 13 sizes.
View line overview →3/32"2.4mm10 ft1/8"3.2mm10 ft3/16"4.8mm10 ft1/4"6.4mm10 ft5/16"8mm10 ft3/8"9.5mm10 ft1/2"12.7mm10 ft
Current5/8"16mm10 ft
3/4"19.1mm10 ft1"25.4mm10 ft1-1/4"31mm10 ft1-1/2"38mm10 ft2"50.8mm10 ftRecovered diameter is approx. 1/3 of the expanded size shown · All sizes ship to USA & Canada