This 3/8" dual-wall heat shrink tubing features a 3:1 shrink ratio, sealing to approximately 1/12" diameter with an adhesive lining for waterproof insulation. It is rated for -45°C to 125°C and fits wire gauges from 10 to 4 AWG.
• Diameter: 3/8" (before shrinking)
• Wire Gauge Range: 10-4 AWG (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
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