---
product_id: 380012996
title: "Wirefy 1/2\" Heat Shrink Tubing - 3:1 Ratio - Adhesive Lined - Marine Grade Heat Shrink - Black - 50 Feet Roll"
brand: "wirefy"
price: "$179"
currency: NZD
in_stock: true
reviews_count: 8
url: https://www.desertcart.nz/products/380012996-wirefy-1-2-heat-shrink-tubing-3-1-ratio-adhesive
store_origin: NZ
region: New Zealand
---

# Adhesive-lined for waterproof seal 3:1 shrink ratio for ultra-tight fit Dual-wall marine grade durability Wirefy 1/2" Heat Shrink Tubing - 3:1 Ratio - Adhesive Lined - Marine Grade Heat Shrink - Black - 50 Feet Roll

**Brand:** wirefy
**Price:** $179
**Availability:** ✅ In Stock

## Summary

> 🔥 Seal it tight, seal it right — the pro’s choice for lasting connections!

## Quick Answers

- **What is this?** Wirefy 1/2" Heat Shrink Tubing - 3:1 Ratio - Adhesive Lined - Marine Grade Heat Shrink - Black - 50 Feet Roll by wirefy
- **How much does it cost?** $179 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/380012996-wirefy-1-2-heat-shrink-tubing-3-1-ratio-adhesive)

## Best For

- wirefy enthusiasts

## Why This Product

- Trusted wirefy brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Generous 50-Foot Roll:** Ample length to power through multiple projects without running out mid-job.
- • **Waterproof Confidence:** Adhesive lining activates with heat to lock out moisture and protect your connections long-term.
- • **Plug & Play Simplicity:** Slide on, apply heat, and secure your wiring in seconds—no fuss, no mess, just flawless insulation.
- • **Precision Fit, Every Time:** 3:1 shrink ratio ensures a snug, professional-grade seal that outperforms standard 2:1 tubing.
- • **Built for the Harshest Conditions:** Marine-grade dual-wall tubing resists fluids, heat, and mechanical stress for unmatched durability.

## Overview

Wirefy’s 1/2" Heat Shrink Tubing features a superior 3:1 shrink ratio and adhesive lining that creates a waterproof, durable seal. Designed with dual-wall marine-grade polyolefin, it withstands heat, fluids, and mechanical wear. UL certified and available in a 50-foot roll, it’s engineered for professional, long-lasting electrical insulation.

## Description

Wirefy 1/2" Heat Shrink Tubing - 3:1 Ratio - Adhesive Lined - Marine Grade Heat Shrink - Black - 50 Feet Roll

## Features

- 3:1 SHRINK RATIO - Recovers to 1/3 of its original diameter, and makes a tight seal. Eliminates the problem of 2:1 tubing not shrinking tight enough.
- GLUE INSIDE - When heat is applied, adhesive comes out and seals the connection. This creates waterproof and long-lasting insulation.
- EASY TO USE - Simply slide heat shrink tube over your connection point and apply heat. Make professional insulated connections in seconds.
- DUAL WALL TUBING - Provides enhanced protection from wear and tear. Industrial grade tubing is resistant to fluids, heat, and mechanical stretch.
- 1/2 INCH (12.7mm) SHRINK TUBING DIAMETER - Get the exact diameter you need. 50 Feet of shrink tubing will last through many projects.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Wirefy |
| Part Number | Wirefy-DWT-12.7-B |
| Product Dimensions | 19 x 6.5 x 19 cm; 635.03 g |
| Item model number | Wirefy-DWT-12.7-B |
| Size | 1/2" - 50 Feet |
| Colour | Black |
| Style | Black |
| Material | Polyolefin |
| Voltage | 600 Volts |
| Item Package Quantity | 1 |
| Measurement System | Inch |
| Certification | UL |
| Batteries included? | No |
| Batteries Required? | No |
| Item Weight | 635 g |

## Product Details

- **Brand:** Wirefy
- **Material:** Polyolefin
- **Colour:** Black
- **Item weight:** 1.4 Pounds
- **Maximum pressure:** 10 Bars
- **Nominal wall thickness:** 1
- **Outside diameter:** 12.7 Millimetres
- **Item length:** 5E+1 Feet
- **UPC:** 850026973044
- **Manufacturer:** Wirefy

## Images

![Wirefy 1/2" Heat Shrink Tubing - 3:1 Ratio - Adhesive Lined - Marine Grade Heat Shrink - Black - 50 Feet Roll - Image 1](https://m.media-amazon.com/images/I/71SBPFrtT5L.jpg)
![Wirefy 1/2" Heat Shrink Tubing - 3:1 Ratio - Adhesive Lined - Marine Grade Heat Shrink - Black - 50 Feet Roll - Image 2](https://m.media-amazon.com/images/I/71nQ8kd6ELL.jpg)
![Wirefy 1/2" Heat Shrink Tubing - 3:1 Ratio - Adhesive Lined - Marine Grade Heat Shrink - Black - 50 Feet Roll - Image 3](https://m.media-amazon.com/images/I/7175FwIA2LL.jpg)
![Wirefy 1/2" Heat Shrink Tubing - 3:1 Ratio - Adhesive Lined - Marine Grade Heat Shrink - Black - 50 Feet Roll - Image 4](https://m.media-amazon.com/images/I/71lsJeA7PjL.jpg)
![Wirefy 1/2" Heat Shrink Tubing - 3:1 Ratio - Adhesive Lined - Marine Grade Heat Shrink - Black - 50 Feet Roll - Image 5](https://m.media-amazon.com/images/I/71iQj19RX+L.jpg)

## Available Options

This product comes in different **Colour Name, Size Name** options.

## Questions & Answers

**Q: Does this start off as 1/2inch then shink down**
A: Yes it does.
I have 1/4'', 3/8'', & 1/2'' and they all measure at least their diameter before shrinking.
I won't use anything but Wirefy tubing!  I like the 3:1 best for my uses.

**Q: what is the operating temperature rating?**
A: From my use it appears to have an operating temperature of between 600F and 900F. Unless the tubing is physically contacting a heat source I would say its save to use at near 1000F. Within 1/8" from a industrial soldering iron that idles at 980F It is safe. It may over-harden if exposed to this level of heat for a length of time (Over 30 min.) Contact heat will burn this at even a low temp.( i.e. laying across an engine's exhaust manifold. It would would work well in nearly any engine compartment. Hope this helps. For short runs this stuff is tough.

**Q: Will it work on 14awg wire?**
A: Yes, 3/16" heat shrink tubing will work on 14AWG wire.

**Q: Is this heat shrink resistant to gasoline?**
A: It is resistant to gasoline. However, we do not recommend to leave it submerged in gasoline.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Very high quality. Used for aluminium pole repair.
*by D***E on 29 January 2025*

I had a snapped and bent aluminum boat canopy frame which I had straightened and repaired with tube inserts and rivets. Fine as far as it goes but I had the bright idea of encasing it in heat shrink to prevent any rough spots damaging the canopy, and to disguise the agricultural nature of the repair in general.I tested several different types of heat shrink, and this one is the clear winner. It is nice and thick, looks great, and I was able to shrink 5 metres of it with a blowtorch without scorching it at all. Add to that its excellent substrate of hot glue, and it's even strengthened the poles somewhat by laminating them. I'm absolutely delighted with the result, which would not have been possible with an inferior product.

### ⭐⭐⭐⭐⭐ Excellent Adhesive Heatshrink
*by M***S on 18 August 2023*

It works exactly as I hoped. Some reviews said that the tubing walls were very thick but I found them to be perfect and actually thinner than some other tubing I've used. I also noted that it does a genuine 3:1 heat shrink as well. Very happy and highly recommended.

### ⭐⭐⭐⭐⭐ Great heat shrink
*by A***. on 20 October 2023*

Amazing heat shrink, takes a while to get around 16 guage but it does fit. And the adhesive really seals it up, I tried pulling it off my test wire and it actually too the wire insulation with it.

## Frequently Bought Together

- Wirefy 1/2" Heat Shrink Tubing - 3:1 Ratio - Adhesive Lined - a resistant Heat Shrink - Black - 50 Feet Roll
- Wirefy Heat Shrink Tubing Kit 180 PCS - 3:1 Ratio Adhesive Lined, Wire Shrink Wrap Tubing - Industrial Heat-Shrink Tubing - Black - Shrink Wrap Tubing | Trusted UL Certification
- Wirefy 200 PCS Heat Shrink Butt Connectors Red 22-16 AWG - Marine Grade Butt Connectors - Wire Butt Splice Connectors - Electrical Waterproof Heat Shrink Butts

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-01-24*