Nice product at great price
Was wiring my car and had quite a few smaller wires to crimp and cover. This worked great — shrinks clean and consistent every time.
Church's · Verified Purchase★ Verified
2:1 Single Wall · UL 224 Recognized
2"
2:1 Heat Shrink
FitsMaximum size50.8mm
2 inch heat shrink tubing is the largest standard size made — a 50.8mm expanded bore that slides over the biggest cable bundles, large-diameter pipe and hose, and heavy industrial cable-assembly ends, then recovers to about 25.4mm (1 inch) on full heat. This is the 2:1 single-wall version: UL 224 polyolefin, flame-retardant, 600V, rated −55°C to +125°C. With no adhesive liner it is not waterproof — it is built for mechanical and abrasion protection, UV-resistant covering, and band-marking large bundles in dry-rated environments such as cable trays, MCC panel entries, and outdoor infrastructure. If you need a sealed, watertight sleeve over a 2 inch cable instead, choose the 3:1 dual-wall adhesive-lined version. Supplied as a 60ft bulk roll, cut to length.
★★★★★4.7 · 225 verified ratings across the Helixal range
Only 8 left · Ships in 24h
Order up to 8 online · need more? Trade pricing
Size2" · 50.8mm
Click any size to navigate · 60 ft per roll
$42.4960 ft spool
→ Dispatched within 24 hours — delivered in 1–3 days→ 30-day money-back guarantee — 30 days to return it
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SKU: B0FJHJZC3F · 2" (50.8mm) · 60 ft
Spec Sheet
2"
data sheet.
High-volume UL 224 Recognized polyolefin at an honest per-foot cost. The industry standard for band marking, bundling, and dry indoor electrical insulation.
Imperial Size
2"
Expanded diameter
Metric Size
50.8mm
Nominal
Roll Length
60 ft
Per spool
Wire Gauge
Maximum size
Bare conductor
Shrink Ratio
2:1
Single wall
Construction
Single Wall
No adhesive liner
Adhesive Liner
None
Not waterproof
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
Material
Polyolefin
UL 224 Recognized
Certification
UL 224
Recognized Component
Flammability
Self-extinguishing
UL 224 Recognized
Color
Black
Standard finish
Moisture
Resistant — not sealed
Single wall only
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.
Perfect for bulk workshop use
Bought this for my automotive workshop and the 120ft roll is exactly what I needed. Shrinks consistently and cleanly every time. Much better value than small packs.
Mike R. · Verified Purchase★ Verified
Professional finish every time
Clean black finish, no bubbles or wrinkles when applied correctly. UL listing is important for commercial electrical work — ticks that box too.
James T. · Verified Purchase★ Verified
Customer Reviews
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Sizing & Application — 2 inch, 60ft roll
The largest bore in the range, and a 25mm floor underneath it.
2 inch (50.8mm) is the biggest single-wall diameter we stock, recovering to roughly 25.4mm. It goes over heavy cable bundles, hose and pipe, and fully terminated large assemblies. It is also the size most often ordered on the strength of its bore alone, which is half of the specification — the other half is that it will not close onto anything narrower than an inch.
What a 25mm recovered wall can and cannot do
A 50.8mm bore is genuinely useful. It passes over bundles that would need two or three smaller sizes, over hose and pipe up to about 40mm, and over terminated assemblies with boots and glands already fitted. For covering, jacketing and mechanical protection at that scale there is nothing smaller that will do the job.
The constraint is underneath. Recovering to about 25.4mm means the tube stops there, so anything below roughly 27mm is being sleeved rather than fitted. That excludes a great deal of what people intend to use it on: a 4/0 cable at 18–20mm, a typical three-conductor bundle at 20mm, most industrial cable assemblies. The tube goes on, it shrinks, and it still moves.
Where it genuinely fits is on things that are actually large — hose and pipe runs, heavy bundle ends, tray exits, machine cable assemblies with substantial dressing. Before ordering, measure the narrowest thing the tube has to close onto and confirm it is above about 27mm. If it is not, the honest answer is usually 1-1/2 inch or the 3:1 version of this size.
2 inch on the 60ft roll
| Property | Figure | Why it matters |
|---|---|---|
| Expanded diameter | 50.8mm (2") | Passes over bundles, hose and pipe up to about 40mm |
| Recovered diameter | ≈25.4mm | The floor — nothing below ~27mm is actually gripped |
| Usable span | ≈27–40mm | Wide in absolute terms, narrow relative to the bore |
| Best applications | Hose and pipe, tray exits, heavy bundle ends | Things that are genuinely large, not merely awkward |
| Wall type | Single-wall polyolefin | Covering, jacketing and abrasion protection; UV resistant |
| Roll length | 60 ft | Most jobs use two or three 8 in pieces |
Ordering by bore alone is the common error at this size. The recovered figure decides whether the finished tube is fitted or merely draped.
When 2 inch 2:1 is not what you want
01 · The item is under about 27mm
It will not be gripped. Use 1-1/2 inch, or the 2" 3:1 Dual Wall whose floor is roughly 16.9mm — three times the closure for the same bore.
02 · The bundle must be sealed
Grooves between conductors stay open end to end under a single-wall tube. Sealed tray exits and enclosure penetrations need the adhesive-lined 3:1.
03 · You need one or two pieces
Sixty feet at this diameter is a substantial roll. If the job is a single penetration, the 2" 3:1 10ft pack is the cheaper way to hold the size.
04 · Above 600V
Our 600V rating is in volts rms, not DC. On a 1000 Vdc circuit the conductor must already be rated and tubing seals or covers rather than insulating.
Keep reading →2" 3:1 Dual Wall — three times the closure · 1-1/2" 2:1 — the next size down · Heat Shrink Tubing Size Chart & Selection Guide
How it shrinks.
01
Measure & Select
Choose a size where the expanded diameter is 20–30% larger than your wire or bundle. Smaller tubes will slide on easier; slightly oversize is better than too tight.
02
Cut & Thread
Cut to length and thread onto the wire before making the splice. The tubing cannot pass over a crimped terminal — position it first, then complete the connection.
03
Apply Heat
The tubing starts shrinking at 100°C — use a heat gun and keep it moving until it has shrunk evenly along its length. Work from the center outward. Avoid open flame — it scorches the tubing and creates uneven shrink.
04
Inspect
Finished tubing should be tight with no bubbles or lifted edges. No adhesive will appear at the ends — this is single-wall tubing. Confirm even recovery across the full length.
Size ReferenceExpanded vs.
Expanded vs.
recovered.
Actual 2" tube at full expanded diameter (50.8mm) and after heat recovery. Use this as your fit reference before cutting.
Expanded: 50.8mm — slides over Maximum size
Shrink ratio: 2:1 on full heat
Use it on.
01
Large Cable Bundle Management
Consolidates and protects the largest cable bundles in industrial facilities, data centers, and power distribution environments.
02
Harness Band Marking
Provides large-diameter band identification on industrial wire harnesses for maintenance, commissioning, and future troubleshooting.
03
Pipe & Hose Identification
Identifies pipes, hoses, and conduits in process plants, mining operations, and heavy manufacturing facilities.
04
Panel Entry Strain Relief
Applied at the point where large cable bundles enter panels and enclosures to distribute mechanical stress and prevent jacket wear.
05
Cable Tray Finishing
Provides a clean finished end cap on cable tray bundles at termination points in industrial and commercial electrical installations.
06
Industrial Mechanical Protection
Covers large cable assemblies in environments where abrasion, oil, and mechanical contact are present but submersion is not.
Size Guide
2" 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 →Uses2:1 Heat Shrink Uses — Bundling & More
Read Guide →SizingSize Chart & Selection Guide
Read Guide →ComparisonHeat Shrink vs Electrical Tape
Read Guide →Buyer's GuideBest Heat Shrink Tubing 2026
Read Guide →Also available — 2" in other lines
All 13 sizes.
View line overview →3/32"2.4mm120 ft1/8"3.2mm120 ft3/16"4.8mm120 ft1/4"6.4mm120 ft5/16"8mm120 ft3/8"9.5mm120 ft1/2"12.7mm120 ft5/8"16mm90 ft3/4"19.1mm90 ft1"25.4mm90 ft1-1/4"31mm60 ft1-1/2"38mm60 ft
Current2"50.8mm60 ft
Recovered diameter is approx. 1/2 of the expanded size shown · All sizes ship to USA & Canada