{"product_id":"31-green-adhesive-heat-shrink-tubing-waterproof-glue-lined","title":"3:1 Green Adhesive Heat Shrink Tubing — Waterproof Glue Lined Sleeving","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003e3:1 Green Adhesive Heat Shrink Tubing — Waterproof Protection for Wiring and Connectors\u003c\/h2\u003e\n\u003cp\u003eExposed wire splices and bare connectors are a liability — moisture, vibration, and abrasion can cause shorts, corrosion, and failures at the worst possible time. Whether you're a marine electrician, automotive technician, or a DIYer tackling outdoor wiring, you need insulation that seals completely, not just covers.\u003c\/p\u003e\n\u003cp\u003eThis 3:1 green adhesive heat shrink tubing features a dual-wall construction: a polyolefin outer layer that shrinks to one-third its original diameter, and a hot-melt adhesive inner lining that flows into gaps and bonds to the substrate when heated. Available in diameters from φ1.6mm (≈1\/16\") to φ39mm (≈1-1\/2\"), and in lengths of 1m, 3m, 5m, 10m, and 15m per roll.\u003c\/p\u003e\n\u003cp\u003eTypical applications include waterproofing automotive wiring harness splices, sealing marine cable connections against saltwater intrusion, protecting underground irrigation wiring, and insulating battery terminal connections in RVs and boats — all scenarios where a standard 2:1 non-adhesive sleeve simply isn't enough.\u003c\/p\u003e\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003eℹ️\u003c\/span\u003e \u003cstrong\u003eCompatibility:\u003c\/strong\u003e Fits standard wire gauges and connectors within the selected diameter range. Verify your connector's outer diameter against the pre-shrink size before ordering. This tubing is not compatible with silicone-jacketed wire without surface preparation.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-note\"\u003e\n\u003cspan class=\"hdiy-note-icon\"\u003e⚠️\u003c\/span\u003e \u003cstrong\u003eNote:\u003c\/strong\u003e Larger diameters (φ25.4mm and above) are available in 1m rolls only. If you need longer lengths in larger sizes, contact us to confirm availability.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2\u003e✅ Key Features of These 3:1 Adhesive-Lined Heat Shrink Tubes\u003c\/h2\u003e\n\u003cul class=\"hdiy-features\"\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e💧\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eWaterproof Glue-Lined Seal\u003c\/strong\u003e — The inner hot-melt adhesive melts and flows around irregular surfaces when heated, creating a moisture-resistant seal ideal for marine wiring and outdoor electrical connections.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003e3:1 Shrink Ratio\u003c\/strong\u003e — Shrinks to one-third of its original diameter, making it suitable for covering bulky connectors, butt splices, and stepped transitions that standard 2:1 tubing cannot accommodate.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎯\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eWide Diameter Range\u003c\/strong\u003e — Available from φ1.6mm to φ39mm, covering everything from fine instrument wire to large battery cables and conduit fittings in a single product line.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e✂️\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eCut-to-Length Flexibility\u003c\/strong\u003e — Supplied in 1m to 15m rolls; cut to any length with scissors before application. No special tools required beyond a standard heat gun.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔋\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eDual-Wall Construction\u003c\/strong\u003e — Polyolefin outer layer provides electrical insulation and abrasion resistance; adhesive inner layer bonds to wire jackets, terminals, and connector bodies for a secure, long-lasting grip.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🚗\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eAutomotive \u0026amp; Marine Rated\u003c\/strong\u003e — Suitable for use in engine bays, bilge wiring, trailer harnesses, and underground irrigation systems where exposure to moisture, fuel vapors, and UV is a concern.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e📐 Technical Specifications — 3:1 Adhesive Heat Shrink Tubing\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eProduct Type\u003c\/th\u003e\n\u003ctd\u003eDual-Wall Adhesive-Lined Heat Shrink Tubing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eShrink Ratio\u003c\/th\u003e\n\u003ctd\u003e3:1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eColor\u003c\/th\u003e\n\u003ctd\u003eGreen\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Diameters (Pre-Shrink)\u003c\/th\u003e\n\u003ctd\u003eφ1.6mm (≈1\/16\") · φ2.4mm (≈3\/32\") · φ3.2mm (≈1\/8\") · φ4mm (≈5\/32\") · φ4.8mm (≈3\/16\") · φ6.4mm (≈1\/4\") · φ7.9mm (≈5\/16\") · φ9.5mm (≈3\/8\") · φ12.7mm (≈1\/2\") · φ15.4mm (≈5\/8\") · φ19.1mm (≈3\/4\") · φ25.4mm (1\") · φ30mm (≈1-3\/16\") · φ39mm (≈1-1\/2\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Lengths\u003c\/th\u003e\n\u003ctd\u003e1m · 3m · 5m · 10m · 15m (see variant options; not all lengths available for all diameters)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOuter Material\u003c\/th\u003e\n\u003ctd\u003ePolyolefin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInner Lining\u003c\/th\u003e\n\u003ctd\u003eHot-melt adhesive (thermoplastic)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eShrink Temperature\u003c\/th\u003e\n\u003ctd\u003eTypically begins at 70–90°C (158–194°F); full adhesive activation at approx. 120°C (248°F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWall Thickness (Recovered)\u003c\/th\u003e\n\u003ctd\u003eSee variant options \/ Contact us to confirm by size\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOperating Temperature Range\u003c\/th\u003e\n\u003ctd\u003eGenerally –55°C to +125°C (–67°F to +257°F) — contact us to confirm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eApplication Tool\u003c\/th\u003e\n\u003ctd\u003eHeat gun (recommended); open flame with caution\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCompliance \/ Standards\u003c\/th\u003e\n\u003ctd\u003eContact us to confirm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-faq\"\u003e\n\u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I choose the right diameter for my wire or connector?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMeasure the outer diameter of the wire or connector before shrinking. With a 3:1 shrink ratio, the tubing should slide over the component easily before heat is applied. As a general rule, choose a pre-shrink diameter that is 20–30% larger than the component's outer diameter. For example, for a 3mm wire, φ4mm tubing is typically a good starting point. Sizes range from φ1.6mm (≈1\/16\") up to φ39mm (≈1-1\/2\") — select your size from the variant options above.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat shrink temperature does this tubing require?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThis tubing generally begins to shrink at around 70–90°C (158–194°F) and fully activates the inner adhesive at approximately 120°C (248°F). A heat gun is the recommended tool. Open flame can be used with caution but may cause uneven shrinkage or scorching.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs this heat shrink tubing suitable for outdoor or marine use?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. The inner adhesive layer melts and flows around the substrate when heated, creating a watertight seal well-suited for outdoor, marine, and underground wiring applications. It typically provides resistance to moisture, mild chemicals, and UV exposure. For submersion or extreme environments, confirm suitability with your specific application requirements.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat does the 3:1 shrink ratio mean, and why does it matter?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eA 3:1 shrink ratio means the tubing will shrink to approximately one-third of its original inner diameter when heat is applied. For example, φ9.5mm (≈3\/8\") tubing will shrink down to roughly φ3.2mm (≈1\/8\"). This wider ratio makes it suitable for covering connectors, splices, and irregular shapes that standard 2:1 tubing cannot accommodate — particularly useful for waterproof butt connectors and ring terminals.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat wire gauges and connector types is this compatible with?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThis tubing is not thread-specific — it is designed to fit over wires, cables, connectors, and terminals of varying shapes. It is generally compatible with standard automotive connectors, marine terminals, butt splices, and ring terminals. Check the diameter range (φ1.6mm–φ39mm) against your connector's outer dimension to confirm fit. It is not recommended for use over silicone-jacketed wire without surface preparation, as adhesion may be reduced.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow much length should I order for my project?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eFor single repairs or small wiring jobs, a 1m roll is typically sufficient. For automotive wiring harnesses or larger installations, 3m, 5m, or 10m rolls offer better value per meter. For ongoing shop use or bulk projects, the 15m roll provides the most cost-effective coverage. Note that 15m rolls are available in smaller diameters (φ1.6mm–φ4.8mm); larger diameters are available in shorter lengths.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I cut this tubing to custom lengths before applying?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. The tubing can be cut to any length with standard scissors or a utility knife before application. Cut ends are clean and do not fray. For best results, cut at a slight angle to make it easier to slide over connectors and terminals.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the recovered wall thickness after shrinking?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eWall thickness after shrinking varies by diameter. In general, the recovered wall thickness is typically in the range of 0.8mm–2.0mm depending on the variant selected. Contact us to confirm the exact specification for your chosen size if precise wall thickness is critical to your application.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your diameter and length above, then add to cart — ships from our US warehouse.\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HomeDIYer","offers":[{"title":"φ1.6mm \/ 1m","offer_id":52330165862674,"sku":"GLFBLFFGLBZSJ000362x1","price":2.45,"currency_code":"USD","in_stock":true},{"title":"φ2.4mm \/ 1m","offer_id":52330165895442,"sku":"GLFBLFFGLBZSJ000370x1","price":2.45,"currency_code":"USD","in_stock":true},{"title":"φ3.2mm \/ 1m","offer_id":52330165928210,"sku":"GLFBLFFGLBZSJ000377x1","price":2.28,"currency_code":"USD","in_stock":true},{"title":"φ4mm \/ 1m","offer_id":52330165960978,"sku":"GLFBLFFGLBZSJ000384x1","price":2.45,"currency_code":"USD","in_stock":true},{"title":"φ4.8mm \/ 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