{"product_id":"dual-wall-adhesive-heat-shrink-tubing-4-6-8-12-16-20mm-electrical-insulation","title":"Dual Wall Adhesive Heat Shrink Tubing 4–20mm | 4:1 Ratio","description":"\n\u003ch2\u003eDual Wall Adhesive-Lined Heat Shrink Tubing – Reliable Electrical Insulation\u003c\/h2\u003e\n\u003cp\u003eKeep your wiring projects protected and professional with this \u003cstrong\u003edual wall heat shrink tubing with adhesive glue lining\u003c\/strong\u003e. Available in six diameters — 4mm, 6mm, 8mm, 12mm, 16mm, and 20mm — this versatile PE tubing delivers a watertight, secure seal around wires, cables, connectors, and splices. The 4:1 shrink ratio provides a tight, conforming fit even over irregular shapes, making it ideal for automotive wiring, marine applications, home electrical work, and hobbyist electronics.\u003c\/p\u003e\n\n\u003ch3\u003eWhy Choose Adhesive-Lined Dual Wall Heat Shrink?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual Wall Construction:\u003c\/strong\u003e Outer PE layer shrinks tightly while the inner adhesive layer melts and bonds to the substrate, forming a moisture-resistant seal.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e4:1 Shrink Ratio:\u003c\/strong\u003e Accommodates a wide range of wire and cable diameters with a single tube size.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e6 Diameter Options:\u003c\/strong\u003e 4mm, 6mm, 8mm, 12mm, 16mm, and 20mm — choose the right size for every application.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePolyethylene (PE) Material:\u003c\/strong\u003e Excellent electrical insulation, chemical resistance, and durability under temperature and mechanical stress.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWaterproof \u0026amp; Corrosion-Resistant:\u003c\/strong\u003e The hot-melt adhesive inner wall creates a sealed barrier against moisture, dust, and corrosion.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Application Range:\u003c\/strong\u003e Suitable for automotive, marine, solar, home electrical, industrial wiring, and DIY electronics projects.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEasy to Apply:\u003c\/strong\u003e Simply slide over the cable and apply heat with a heat gun or lighter — shrinks quickly and uniformly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eProduct Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Polyethylene (PE) – Dual Wall with Hot-Melt Adhesive\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 Tubing\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMade in:\u003c\/strong\u003e Mainland China\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eAutomotive and motorcycle wiring harnesses\u003c\/li\u003e\n  \u003cli\u003eMarine and outdoor cable protection\u003c\/li\u003e\n  \u003cli\u003eSolar panel and battery cable connections\u003c\/li\u003e\n  \u003cli\u003eHome electrical splices and connector insulation\u003c\/li\u003e\n  \u003cli\u003eDIY electronics and hobbyist projects\u003c\/li\u003e\n  \u003cli\u003eIndustrial control panel wiring\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1-channel-scr-solid-state-relay-switch-module-dc3-24v-40a-optocoupler\"\u003e1-Channel SCR Solid State Relay Module DC3-24V 40A Optocoupler\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1-8m-displayport-to-hdmi-cable-4k-dp-adapter-pc-hdtv-projector\"\u003e1.8M DisplayPort to HDMI Cable 4K – DP Adapter for PC \u0026amp; TV\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/10-pack-12v-3-pin-pc-fan-power-extension-cable-26cm-cpu-gpu-cooler\"\u003e10-Pack 12V 3-Pin PC Fan Extension Cable 26cm – CPU GPU Cooler\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor guidance on safe electrical wiring practices and standards, visit the U.S. Consumer Product Safety Commission – Electrical Safety.\u003c\/p\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/Insulator_%28electricity%29\" target=\"_blank\" rel=\"noopener\"\u003eInsulator (electricity)\u003c\/a\u003e\u003c\/p\u003e\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 \u003cstrong\u003e4:1 shrink ratio\u003c\/strong\u003e, meaning it can shrink down to one-quarter of its original diameter. This makes it suitable for a wide variety of wire and cable sizes across all six available diameter options (4mm to 20mm).\u003c\/p\u003e\n\u003ch4\u003eQ: Do I need a heat gun to apply this heat shrink tubing?\u003c\/h4\u003e\n\u003cp\u003eA: A heat gun is the recommended tool for even, controlled shrinking and to properly activate the inner adhesive glue lining. A lighter or other heat source can work in a pinch, but a heat gun ensures the best waterproof seal and most uniform result.\u003c\/p\u003e\n\u003ch4\u003eQ: Is this tubing waterproof after application?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The dual wall design includes a hot-melt adhesive inner layer that melts when heat is applied, flowing around the cable and creating a \u003cstrong\u003emoisture-resistant, waterproof seal\u003c\/strong\u003e. This makes it ideal for outdoor, marine, and automotive applications where cables may be exposed to water or humidity.\u003c\/p\u003e\n\u003ch4\u003eQ: Which size should I choose for my cable?\u003c\/h4\u003e\n\u003cp\u003eA: Choose a diameter that is slightly larger than your cable's outer diameter before shrinking. With a 4:1 ratio, you have flexibility — for example, a 12mm tube will shrink down to approximately 3mm. When in doubt, size up to ensure easy fitting before heat is applied.\u003c\/p\u003e\n\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 can shrink down to one-quarter of its original diameter. This makes it suitable for a wide variety of wire and cable sizes across all six available diameter options (4mm to 20mm).\"}}, {\"@type\": \"Question\", \"name\": \"Do I need a heat gun to apply this heat shrink tubing?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"A heat gun is the recommended tool for even, controlled shrinking and to properly activate the inner adhesive glue lining. A lighter or other heat source can work in a pinch, but a heat gun ensures the best waterproof seal and most uniform result.\"}}, {\"@type\": \"Question\", \"name\": \"Is this tubing waterproof after application?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. The dual wall design includes a hot-melt adhesive inner layer that melts when heat is applied, flowing around the cable and creating a moisture-resistant, waterproof seal. This makes it ideal for outdoor, marine, and automotive applications where cables may be exposed to water or humidity.\"}}, {\"@type\": \"Question\", \"name\": \"Which size should I choose for my cable?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Choose a diameter that is slightly larger than your cable's outer diameter before shrinking. With a 4:1 ratio, you have flexibility — for example, a 12mm tube will shrink down to approximately 3mm. When in doubt, size up to ensure easy fitting before heat is applied.\"}}]}\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:\/\/oasis-select.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Electronics \u0026 Tech\", \"item\": \"https:\/\/oasis-select.com\/collections\/electronics-tech\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"Dual Wall Adhesive Heat Shrink Tubing 4–20mm | 4:1 Ratio\", \"item\": \"https:\/\/oasis-select.com\/products\/dual-wall-adhesive-heat-shrink-tubing-4-6-8-12-16-20mm-electrical-insulation\"}]}\u003c\/script\u003e","brand":"Oasis Select","offers":[{"title":"black \/ 4mm","offer_id":47727674556521,"sku":"100006028:201336457;14:193","price":9.16,"currency_code":"USD","in_stock":true},{"title":"black \/ 12mm","offer_id":47727674589289,"sku":"100006028:100016944;14:193","price":9.16,"currency_code":"USD","in_stock":true},{"title":"black \/ 8mm","offer_id":47727674622057,"sku":"100006028:100016941;14:193","price":9.16,"currency_code":"USD","in_stock":true},{"title":"black \/ 6mm","offer_id":47727674654825,"sku":"100006028:100016940;14:193","price":9.16,"currency_code":"USD","in_stock":true},{"title":"black \/ 16mm","offer_id":47727674687593,"sku":"100006028:3269250#16mm;14:193","price":9.16,"currency_code":"USD","in_stock":true},{"title":"black \/ 20 mm","offer_id":47727674720361,"sku":"100006028:19952726;14:193","price":9.16,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/7931\/3257\/files\/Sfba6c06afe6a4f59ba3254aa6f1c8991C_6c27b88c-6ec5-407a-ba0b-1fcfd917cec7.webp?v=1782670545","url":"https:\/\/oasis-select.com\/products\/dual-wall-adhesive-heat-shrink-tubing-4-6-8-12-16-20mm-electrical-insulation","provider":"Oasis Select","version":"1.0","type":"link"}