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Red dual wall adhesive-lined heat shrink tubing

1-1/2" Dual Wall Heat Shrink Red

STH112R-4

$18.89

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1-1/2" dual wall heat shrink tubing in red, with an adhesive lining. It has a 3:1 shrink ratio, so it recovers to about one-third of its supplied 1-1/2" diameter, and the adhesive melts as it shrinks to seal out water, salt and road spray. Rated -45°C to 125°C; begins shrinking at 100°C.

Use it for: large lug barrels, cable bundles and tool handles on boats, trailers, trucks and anywhere a connection sees water.

Getting the right size: it fits large lug barrels, cable bundles and handles — measure the largest diameter you need to cover and check the size chart. Not sure? See the heat shrink tubing size chart. Other red sizes: 1/4" · 3/8" · 1/2" · 3/4" · 1". Same size in black. For dry locations where you don't need a seal, 1-1/2" single wall costs less.

Sold in 6 in and 4 ft pieces. See all dual wall heat shrink.

• Diameter: 1-1/2" (before shrinking)
• Wire Gauge Range: 4/0 AWG - 350 kcmil (approximate coverage after shrinking)
• Shrink Ratio: 3:1 (shrinks to 1/3 original diameter)
• Material: Dual-wall polyolefin with adhesive lining
• Temperature Rating: -45°C to 125°C (-49°F to 257°F)
• Activation Temperature: 100°C (212°F)
• Waterproof: Yes

• Marine Wire Splicing & Connections - Seal wire splices, terminal connections, and cable joints in boats where saltwater exposure requires waterproof protection that prevents corrosion and electrical failure.

• Outdoor Electrical Installations - Protect wire connections in landscape lighting, outdoor outlets, and weatherproof junction boxes where rain, snow, and UV exposure demand durable, waterproof insulation.

• Automotive & Trailer Wiring - Insulate battery cable connections, wire splices, and terminal ends in vehicles and trailers where road spray, moisture, and vibration require sealed protection against corrosion.

• Underground Cable Protection - Seal direct burial splices, well pump connections, and irrigation system wiring where moisture, soil chemicals, and pressure require permanent waterproof barriers.

  • UL Listed
  • CSA Certified
  • Meets Mil-Spec 23053/4 standards
  • Free Shipping on orders $50+
  • Orders placed before 3pm PST ship same day
  • 30-day no-hassle return
  • Buyer may be liable for return shipping charges

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