---
product_id: 386344254
title: "Wirefy 3/8\" Heat Shrink Tubing - 3:1 Ratio - Adhesive Lined - Marine Grade Heat Shrink - Black - 50 Feet Roll"
brand: "wirefy"
price: "$6.70"
currency: USD
in_stock: false
url: https://www.desertcart.us/products/386344254-wirefy-3-8-heat-shrink-tubing-3-1-ratio-adhesive
store_origin: US
region: United States of America
---

# Adhesive-lined for waterproof insulation 3:1 shrink ratio for ultra-tight seal Dual-wall, marine-grade durability Wirefy 3/8" Heat Shrink Tubing - 3:1 Ratio - Adhesive Lined - Marine Grade Heat Shrink - Black - 50 Feet Roll

**Brand:** wirefy
**Price:** $6.70
**Availability:** ❌ Out of Stock

## Summary

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

## Quick Answers

- **What is this?** Wirefy 3/8" Heat Shrink Tubing - 3:1 Ratio - Adhesive Lined - Marine Grade Heat Shrink - Black - 50 Feet Roll by wirefy
- **How much does it cost?** $6.70 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/386344254-wirefy-3-8-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:** Built-in adhesive activates with heat to lock out moisture and protect your connections long-term.
- • **Marine-Grade Toughness:** Dual-wall construction resists heat, fluids, and mechanical stress—ideal for demanding environments.
- • **Plug & Play Simplicity:** Slide on, apply heat, and secure your wiring in seconds—no fuss, no mess, just flawless results.
- • **Precision Fit, Every Time:** 3:1 shrink ratio ensures a snug, professional-grade seal that outperforms standard tubing.

## Overview

Wirefy’s 3/8" Heat Shrink Tubing features a superior 3:1 shrink ratio and adhesive-lined dual-wall design, delivering waterproof, durable insulation with marine-grade toughness. This 50-foot black polyolefin roll is UL certified and rated for 600 volts, making it the ultimate solution for professional electrical and marine applications.

## Description

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. VARIETY OF DIAMETERS - Get the exact diameter you need. 50 Feet of shrink tubing will last through many projects.

## 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.
- 3/8 INCH (9.5mm) 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-9.5-B |
| Item Weight | 499 g |
| Product Dimensions | 24.99 x 6.5 x 0.25 cm; 498.95 g |
| Item model number | Wirefy-DWT-9.5-B |
| Size | 3/8" - 50 Feet |
| Color | Black |
| Style | Black |
| Material | Polyolefin |
| Voltage | 600 Volts |
| Item Package Quantity | 1 |
| Measurement System | Inch |
| Specification met | UL |
| Batteries Included? | No |
| Batteries Required? | No |

## Product Details

- **Brand:** Wirefy
- **Material:** Polyolefin
- **Colour:** Black
- **Product dimensions:** 25L x 6.5W centimeters
- **Item weight:** 1.1 Pounds

## Images

![Wirefy 3/8" 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/71jVkJH53ML.jpg)
![Wirefy 3/8" 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/71wxLDwqrHL.jpg)
![Wirefy 3/8" 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 3/8" 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 3/8" 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/71WLgzBobhL.jpg)

## Available Options

This product comes in different **Color, Size** 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.

## Frequently Bought Together

- Wirefy 3/8" Heat Shrink Tubing - 3:1 Ratio - Adhesive Lined - Marine Grade Heat Shrink - Black - 50 Feet Roll | Wire Heat Shrink Tubing, Wire Shrink Wrap Tubing, Heat Shrink Wire Tubing
- Wirefy 150 PCS Wire Spade Connectors - Female Spade Connector Heat Shrink - Quick Disconnect Wire Connectors - Electrical Spade Terminals - Female Spade Connector 16-14 Gauge | Blue Spade Connectors
- 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 United States of America*
*Store origin: US*
*Last updated: 2026-03-17*