{"product_id":"dual-wall-glue-lined-heat-shrink-tubing-4-1-ratio-cable-protection","title":"Dual Wall Glue-Lined Heat Shrink Tubing – 4:1, 6 Sizes","description":"\u003ch2\u003eDual Wall Glue-Lined Heat Shrink Tubing – Waterproof Cable Protection in 6 Sizes\u003c\/h2\u003e\n\u003cp\u003eKeep your wiring neat, secure, and fully protected with this \u003cstrong\u003eDual Wall Heat Shrink Tubing\u003c\/strong\u003e. Featuring a powerful \u003cstrong\u003e4:1 shrink ratio\u003c\/strong\u003e and an inner adhesive (hot-melt glue) lining, this tubing creates an airtight, waterproof seal around cables, connectors, and splices — ideal for automotive, marine, electrical, and DIY applications. Available in six diameter options: \u003cstrong\u003e4mm, 6mm, 8mm, 12mm, 16mm, and 20mm\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eMade in Mainland China.\u003c\/p\u003e\n\n\u003ch3\u003eWhy Choose Dual Wall Heat Shrink Tubing?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e4:1 Shrink Ratio:\u003c\/strong\u003e Shrinks to a quarter of its original diameter for a snug, reliable fit over a wide range of cable sizes.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInner Glue Layer:\u003c\/strong\u003e The hot-melt adhesive liner melts when heated, flowing around irregularities to form a watertight, corrosion-resistant seal — far superior to single-wall tubing.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePE Construction:\u003c\/strong\u003e High-quality polyethylene material delivers excellent electrical insulation, mechanical abrasion resistance, and durability.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e6 Size Options:\u003c\/strong\u003e Diameters of 4mm, 6mm, 8mm, 12mm, 16mm, and 20mm mean you'll always have the right fit for any cable or connector.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVersatile Use:\u003c\/strong\u003e Perfect for automotive wiring, marine wiring harnesses, outdoor electrical connections, wire splices, and hobbyist or workshop projects.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEasy to Apply:\u003c\/strong\u003e Simply slide over the cable and apply even heat from a heat gun to shrink and seal in seconds.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Polyethylene (PE) with hot-melt adhesive inner wall\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShrink Ratio:\u003c\/strong\u003e 4:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAvailable Diameters:\u003c\/strong\u003e 4mm, 6mm, 8mm, 12mm, 16mm, 20mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Heat Shrinkable, Dual Wall, Glue-Lined\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBattery Required:\u003c\/strong\u003e No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Made in Mainland China\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCommon Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eAutomotive and motorcycle wiring harnesses\u003c\/li\u003e\n  \u003cli\u003eMarine and outdoor electrical connections\u003c\/li\u003e\n  \u003cli\u003eWire splicing and connector sealing\u003c\/li\u003e\n  \u003cli\u003eIndustrial cable management and protection\u003c\/li\u003e\n  \u003cli\u003eDIY electronics and hobby projects\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor guidance on electrical safety standards and best practices for wiring insulation, refer to the \u003ca href=\"https:\/\/www.osha.gov\/electrical\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eOSHA Electrical Safety Resource\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1-4-inch-npt-nickel-plated-brass-air-compressor-tank-fill-valve\"\u003e1\/4\" NPT Nickel Plated Brass Air Compressor Tank Fill Valve\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/hex-shank-wire-twister-drill-attachment-rebar-tie-tool\"\u003e1\/4\" Hex Shank Wire Twister Drill Attachment | Rebar Tie Tool\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1-2-inch-drive-wheel-protector-impact-socket-set-storage-case\"\u003e1\/2\" Drive Wheel Protector Impact Socket Set + Storage Case\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What is the shrink ratio of this dual wall heat shrink tubing?\u003c\/h4\u003e\n\u003cp\u003eA: This heat shrink tubing features a 4:1 shrink ratio, meaning it shrinks to one-quarter of its original diameter when heat is applied. This makes it suitable for covering a wide variety of cable and connector sizes with a secure, snug fit.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Do I need a special tool to apply this heat shrink tubing?\u003c\/h4\u003e\n\u003cp\u003eA: A standard heat gun is recommended for best results. Apply even heat along the length of the tubing and it will shrink down while the inner glue layer melts to create a waterproof seal. A lighter can be used in a pinch, but a heat gun provides more even and controlled shrinkage.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is this tubing waterproof?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The dual wall construction includes a hot-melt adhesive inner lining that flows and seals around the cable when heated, creating an excellent waterproof and moisture-resistant barrier — ideal for outdoor, automotive, and marine environments.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Which diameter size should I choose?\u003c\/h4\u003e\n\u003cp\u003eA: Choose a diameter that is slightly larger than the widest point of the cable or connector you need to cover. For example, use the 4mm or 6mm for thin gauge wires, 8mm or 12mm for medium cables and connectors, and 16mm or 20mm for larger bundles or heavy-duty connectors. Because of the 4:1 ratio, each size accommodates a broad range of cable dimensions.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What is the shrink ratio of this dual wall heat shrink tubing?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This heat shrink tubing features a 4:1 shrink ratio, meaning it shrinks to one-quarter of its original diameter when heat is applied. This makes it suitable for covering a wide variety of cable and connector sizes with a secure, snug fit.\"}}, {\"@type\": \"Question\", \"name\": \"Do I need a special tool to apply this heat shrink tubing?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"A standard heat gun is recommended for best results. Apply even heat along the length of the tubing and it will shrink down while the inner glue layer melts to create a waterproof seal. 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Because of the 4:1 ratio, each size accommodates a broad range of cable dimensions.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/0i45ne-c8.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Fasteners \u0026 Electrical\", \"item\": \"https:\/\/0i45ne-c8.myshopify.com\/collections\/fasteners-electrical\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"Dual Wall Glue-Lined Heat Shrink Tubing – 4:1, 6 Sizes\", \"item\": \"https:\/\/0i45ne-c8.myshopify.com\/products\/dual-wall-glue-lined-heat-shrink-tubing-4-1-ratio-cable-protection\"}]}\u003c\/script\u003e","brand":"Zpaxo","offers":[{"title":"black \/ 12mm","offer_id":54170633503030,"sku":"100006028:100016944;14:193","price":9.02,"currency_code":"USD","in_stock":false},{"title":"black \/ 4mm","offer_id":54170633535798,"sku":"100006028:201336457;14:193","price":9.02,"currency_code":"USD","in_stock":false},{"title":"black \/ 6mm","offer_id":54170633568566,"sku":"100006028:100016940;14:193","price":9.02,"currency_code":"USD","in_stock":false},{"title":"black \/ 8mm","offer_id":54170633601334,"sku":"100006028:100016941;14:193","price":9.02,"currency_code":"USD","in_stock":false},{"title":"black \/ 16mm","offer_id":54170633634102,"sku":"100006028:3269250#16mm;14:193","price":9.02,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0989\/7774\/3158\/files\/Sd9271a13349240e9b8758ff8dc1e79a6e.webp?v=1782840589","url":"https:\/\/0i45ne-c8.myshopify.com\/products\/dual-wall-glue-lined-heat-shrink-tubing-4-1-ratio-cable-protection","provider":"Zpaxo","version":"1.0","type":"link"}