1/4 Inch Heat Shrink Tubing Adhesive Lined - 50ft Bulk Spool 3:1 Ratio Dual Wall Shrink Wrap - Marine Grade Waterproof Insulation for Automotive, Boat, and Electrical DIY - Black

3:1 SHRINK RATIO & 360° WATERPROOF SEAL - Our 1/4" black heat shrink tubing features a 3:1 shrink ratio with heat-activated adhesive, creating a permanent moisture-proof barrier that resists saltwater, oil, and corrosion. Ideal for automotive wiring, boat connections, and electrical DIY projects. MARINE GRADE DURABILITY & VW-1 FLAME RETARDANT - UL-certified flame-retardant tubing withstands extreme temperatures (-55°C to 125°C) and harsh outdoor/marine environments. Protects electrical connections from UV rays, chemicals, and mechanical damage for long-lasting reliability. TIGHT FIT ON UNEVEN SURFACES - The dual-wall design conforms to uneven wire surfaces and large connectors, providing a tighter, more secure seal than standard 2:1 tubing.

Perfect for insulating solder joints and wire splices in automotive and marine setups. EASY TO USE & VERSATILE - Activate with a heat gun for quick, professional-grade insulation. Suitable for DIYers, mechanics, and boat owners working on automotive repairs, marine wiring, and electrical DIY projects. 50FT BULK SPOOL VALUE - The 50-foot spool offers ample material for multiple projects, from automotive fixes and marine upgrades to home electrical DIY. Keeps tubing organized and tangle-free for immediate use