Professional-Grade Heat Shrink Tubing for Demanding Environments
Whether you're rewiring a boat trailer, repairing car harnesses, or weatherproofing outdoor lighting, our 3/4 inch dual-color heat shrink tubing set delivers reliable, long-lasting protection. Featuring a 3:1 shrink ratio and adhesive-lined inner wall, this tubing creates a watertight seal that outperforms standard tubing in harsh conditions. The set includes 5 feet of black and 5 feet of red – perfect for color-coding positive/negative connections or organizing multiple circuits.
Why Choose This Adhesive-Lined Heat Shrink Tubing?
✅ Superior 3:1 Shrink Ratio
Fits a wider range of wire gauges and connector sizes
Ideal for covering irregular shapes like splices, battery lugs, and broken cable jackets
Shrinks quickly and evenly with a heat gun or torch（use low flame, keep moving）
✅ Waterproof & Environmentally Sealed
The built-in hot-melt adhesive creates a permanent barrier against:
Water & moisture – Prevents short circuits
Dust & dirt – Keeps connections clean
Gas & oil – Suitable for engine compartments
✅ Dual-Wall Durability
Outer cross-linked polyolefin: Tough, abrasion-resistant, and flexible
Inner adhesive: Melts and flows to fill voids, providing strain relief and a complete seal
Result: A smooth, professional finish that outlasts electrical tape or standard tubing
✅ Color-Coded for Easy Identification
Red: Positive (+) or power circuits
Black: Negative (–), ground, or return circuits
Simplifies troubleshooting and reduces wiring errors
✅ Endless Applications Across Industries
Marine: Boat wiring, fish finder cables, navigation lights, bilge pumps
Automotive: Trailer harness, off-road lights, sensor wires, battery cables
RV & Camper: Solar panel wiring, interior lighting, 12V systems
Industrial: Control panels, machinery wiring, sensor protection
Home & DIY: Speaker wires, appliance repair, holiday light connections, garden lighting
How to Use:
Cut the desired length of tubing（use sharp scissors or a knife）.
Slide it over the wire, cable, or connector before soldering or crimping.
Apply heat evenly with a heat gun（recommended）or carefully with a butane torch.
Heat until the tubing shrinks fully and adhesive flows out slightly from both ends.
Allow to cool – the connection is now sealed and protected.
Pro Tip: For the best seal, ensure the tubing overlaps solid insulation on both ends by at least 1/4 inch. Clean and dry the cable surface before shrinking.
Technical Specifications:
Material: Cross-linked polyolefin（outer）+ Hot-melt adhesive（inner）
Diameter（as supplied）: 3/4 inch（19mm）
Diameter（fully recovered）: 1/4 inch（6.4mm）
Shrink Ratio: 3:1
Length per color: 5 feet
Total length: 10 feet
Shrink Temperature: 176°F – 257°F（80°C – 125°C）
Operating Temperature Range: -67°F to 230°F（-55°C to 110°C）
Dielectric Strength: ≥15 kV/mm
What's in the Box:
1 × 5 ft Black 3/4 inch Adhesive-Lined Heat Shrink Tubing
1 × 5 ft Red 3/4 inch Adhesive-Lined Heat Shrink Tubing
Weatherproof your wiring with professional-grade heat shrink – order your 10 ft dual-color set today!