{"product_id":"heat-shrink-tubing-3-1-adhesive-glue-lined-dual-wall-30mm","title":"3:1 Adhesive Glue Lined Heat Shrink Tubing Φ30mm — Dual Wall Waterproof Sleeving","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003e3:1 Adhesive Glue Lined Heat Shrink Tubing Φ30mm — Reliable Waterproof Cable Protection\u003c\/h2\u003e\n\u003cp\u003eElectricians, automotive technicians, marine riggers, and serious DIYers know the frustration of splice joints that corrode, connectors that work loose in wet conditions, or cable bundles that chafe through unprotected insulation. This \u003cstrong\u003e3:1 adhesive glue lined heat shrink tubing\u003c\/strong\u003e is engineered to solve exactly those problems — delivering a durable, moisture-resistant sleeve that bonds directly to the cable surface.\u003c\/p\u003e\n\u003cp\u003eEach order is supplied as a continuous length of dual-wall heat shrink tubing with a supplied inner diameter of \u003cstrong\u003eΦ30mm (≈1.18\")\u003c\/strong\u003e. The outer wall is a flexible polyolefin sleeve; the inner wall is a hot-melt adhesive lining that flows and seals when heat is applied. Available in lengths of \u003cstrong\u003e1M (≈39.4\")\u003c\/strong\u003e, \u003cstrong\u003e2M (≈78.7\")\u003c\/strong\u003e, \u003cstrong\u003e5M (≈196.9\")\u003c\/strong\u003e, \u003cstrong\u003e8M (≈314.9\")\u003c\/strong\u003e, and \u003cstrong\u003e10M (≈393.7\")\u003c\/strong\u003e, and in eight colors: Black, White, Red, Green, Yellow, Blue, Transparent, and Orange — so you can cut to size and color-code as needed.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include sealing large-gauge battery cable terminations, protecting wiring harness splices in engine bays, waterproofing marine electrical connections, bundling multi-conductor runs in control panels, and strain-relieving cable entries on outdoor enclosures. The 3:1 shrink ratio makes this tubing especially useful where cables taper or where a tight, conforming fit over irregular shapes is required.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003eℹ️\u003c\/span\u003e \u003cstrong\u003eCompatibility Note:\u003c\/strong\u003e Supplied inner diameter is Φ30mm (≈1.18\"). Fits cable bundles and connectors up to approximately 28mm OD. Recovered inner diameter is typically ~Φ10mm after full 3:1 shrinkage. Verify your cable OD before ordering.\u003c\/div\u003e\n\u003ch2\u003e✅ Key Features of These 3:1 Adhesive 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\u003eDual-Wall Waterproof Seal\u003c\/strong\u003e — The inner hot-melt adhesive layer flows during shrinkage to create a moisture-resistant, corrosion-inhibiting bond around cables, connectors, and splices — ideal for marine and outdoor wiring applications.\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, conforming tightly to irregular shapes, tapered connectors, and multi-conductor bundles where standard 2:1 tubing falls short.\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 continuous lengths from 1M to 10M so you can cut exactly what you need for each job — no waste, no splicing short pieces together.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎨\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003e8-Color Selection for Wiring Identification\u003c\/strong\u003e — Available in Black, White, Red, Green, Yellow, Blue, Transparent, and Orange to support color-coded wiring systems in automotive, industrial, and panel-wiring environments.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🌡️\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003ePolyolefin Outer Wall\u003c\/strong\u003e — The flexible polyolefin sleeve is generally resistant to oils, solvents, and abrasion, making it suitable for engine bay cable protection and industrial cable sleeving applications.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚡\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eStrain Relief \u0026amp; Bundle Management\u003c\/strong\u003e — The recovered tubing provides mechanical strain relief at cable entry points on enclosures, junction boxes, and connectors, reducing flex fatigue on large-gauge wire terminations.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"hdiy-note\"\u003e\n\u003cspan class=\"hdiy-note-icon\"\u003e⚠️\u003c\/span\u003e \u003cstrong\u003eApplication Tip:\u003c\/strong\u003e Use a heat gun for even shrinkage. Work from the center outward to prevent air pockets. Avoid open flames — uneven heat can scorch the outer wall before the adhesive fully activates.\u003c\/div\u003e\n\u003ch2\u003e📐 Technical Specifications — Dual Wall 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 Glue 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\u003eSupplied Inner Diameter\u003c\/th\u003e\n\u003ctd\u003eΦ30mm (≈1.18\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRecovered Inner Diameter\u003c\/th\u003e\n\u003ctd\u003eTypically ~Φ10mm (≈0.39\") — contact us to confirm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOuter Wall Material\u003c\/th\u003e\n\u003ctd\u003ePolyolefin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInner Wall (Adhesive)\u003c\/th\u003e\n\u003ctd\u003eHot-melt adhesive lining\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eShrink Temperature\u003c\/th\u003e\n\u003ctd\u003eTypically 70–135°C (158–275°F) — see variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Lengths\u003c\/th\u003e\n\u003ctd\u003e1M \/ 2M \/ 5M \/ 8M \/ 10M (cut-to-length)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Colors\u003c\/th\u003e\n\u003ctd\u003eBlack, White, Red, Green, Yellow, Blue, Transparent, Orange\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWall Thickness (recovered)\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eVoltage Rating\u003c\/th\u003e\n\u003ctd\u003eContact us to confirm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOperating Temperature Range\u003c\/th\u003e\n\u003ctd\u003eContact us to confirm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSuitable Applications\u003c\/th\u003e\n\u003ctd\u003eAutomotive, marine, industrial, outdoor electrical, panel wiring\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\u003eWhat does 3:1 shrink ratio mean, and how do I choose the right length?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eA 3:1 ratio means the tubing shrinks to one-third of its original diameter when heat is applied — so this Φ30mm tubing typically recovers to around Φ10mm. For length, measure the section you need to cover and add at least 10–15mm (about 1\/2\") on each end for overlap. Available lengths: \u003cstrong\u003e1M (≈39.4\")\u003c\/strong\u003e, \u003cstrong\u003e2M (≈78.7\")\u003c\/strong\u003e, \u003cstrong\u003e5M (≈196.9\")\u003c\/strong\u003e, \u003cstrong\u003e8M (≈314.9\")\u003c\/strong\u003e, and \u003cstrong\u003e10M (≈393.7\")\u003c\/strong\u003e. Buying a longer roll is generally more economical for ongoing projects.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the wall thickness and recovered inner diameter of this tubing?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe supplied inner diameter is \u003cstrong\u003eΦ30mm (≈1.18\")\u003c\/strong\u003e. After full shrinkage at the 3:1 ratio, the recovered inner diameter is typically around \u003cstrong\u003eΦ10mm (≈0.39\")\u003c\/strong\u003e. Recovered wall thickness varies by color batch — contact us to confirm for critical or high-voltage applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs this heat shrink tubing waterproof and 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 during shrinkage to create a moisture-resistant seal around cables and connectors, making it generally suitable for outdoor, marine, and automotive environments. For prolonged UV exposure, the \u003cstrong\u003eblack variant\u003c\/strong\u003e typically offers the best UV resistance. Other colors may be used outdoors but may show some UV degradation over extended periods.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat temperature is needed to shrink this tubing, and what tools should I use?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eDual-wall adhesive heat shrink tubing of this type typically begins shrinking at around \u003cstrong\u003e70–90°C (158–194°F)\u003c\/strong\u003e and fully activates the adhesive at approximately \u003cstrong\u003e120–135°C (248–275°F)\u003c\/strong\u003e. A \u003cstrong\u003eheat gun\u003c\/strong\u003e is strongly recommended for even, controlled heat application. Work from the center outward to prevent trapped air. Open flames are generally not advised as they can scorch the outer wall before the adhesive fully activates.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat wire or cable sizes does Φ30mm heat shrink tubing fit?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eWith a supplied inner diameter of \u003cstrong\u003eΦ30mm (≈1.18\")\u003c\/strong\u003e, this tubing is generally suited for cable bundles, conduit ends, or connectors up to approximately \u003cstrong\u003e28mm in diameter\u003c\/strong\u003e before shrinkage. It is commonly used on large-gauge battery cables, wiring harnesses, and multi-conductor bundles. Always measure your cable or connector OD before ordering to ensure a proper fit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I cut this tubing to a custom length?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. The tubing is supplied in continuous lengths and can be cut to any custom length with scissors or a utility knife before application. Cut ends cleanly and squarely for the best seal. For high-volume or repetitive cuts, a rotary cutter or tube cutter jig can improve consistency.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDoes the color affect performance or UV resistance?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eColor is primarily for identification, organization, or aesthetics and does not generally affect shrink ratio or adhesive performance. \u003cstrong\u003eBlack\u003c\/strong\u003e tubing typically offers the best UV and sunlight resistance for outdoor installations. Other colors — White, Red, Green, Yellow, Blue, Transparent, and Orange — are ideal for color-coded wiring systems in control panels, vehicles, or marine applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow does adhesive glue-lined tubing differ from standard single-wall heat shrink?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eStandard single-wall heat shrink tubing provides insulation and mechanical protection but does not seal against moisture. Adhesive glue-lined (dual-wall) tubing adds an inner layer of hot-melt adhesive that flows when heated, bonding to the cable jacket and creating a watertight, strain-relieving seal. This makes it the preferred choice for \u003cstrong\u003ewaterproof cable splices\u003c\/strong\u003e, marine wiring, and any application where moisture ingress is a concern.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your \u003cstrong\u003ecolor and length\u003c\/strong\u003e above, then add to cart — ships from our US warehouse.\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HomeDIYer","offers":[{"title":"Black \/ 1M","offer_id":52330136207634,"sku":"GLFBFHHGLBZSJ000444x1","price":21.01,"currency_code":"USD","in_stock":true},{"title":"Black \/ 2M","offer_id":52330136240402,"sku":"GLFBFHHGLBZSJ000444x2","price":39.9,"currency_code":"USD","in_stock":true},{"title":"Black \/ 5M","offer_id":52330136273170,"sku":"GLFBFHHGLBZSJ000444x5","price":106.19,"currency_code":"USD","in_stock":true},{"title":"Black \/ 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