{"product_id":"dual-wall-heat-shrink-tubing-glue-4-6-8-12-16-20mm-electrical-insulation","title":"Dual Wall Heat Shrink Tubing with Glue 4–20mm | 4:1 Ratio","description":"\u003cp\u003eKeep your wiring safe, sealed, and professional-looking with this \u003cstrong\u003eDual Wall Heat Shrink Tubing with Adhesive Glue Lining\u003c\/strong\u003e. Available in six diameters — 4, 6, 8, 12, 16, and 20mm — this 4:1 shrink-ratio tubing provides robust electrical insulation, moisture sealing, and strain relief for cables, connectors, and wire splices in a wide range of applications.\u003c\/p\u003e\n\n\u003cp\u003eMade from high-quality \u003cstrong\u003epolyethylene (PE)\u003c\/strong\u003e with an inner layer of hot-melt adhesive, this heat shrinkable tubing creates a tight, waterproof seal when heated. It's ideal for automotive wiring, marine applications, electronics projects, and outdoor electrical work where protection from moisture, dust, and corrosion is essential.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMade in Mainland China.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e4:1 Shrink Ratio\u003c\/strong\u003e – Shrinks to one quarter of its original diameter for a snug, secure fit around cables and connectors\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual Wall Construction\u003c\/strong\u003e – Outer PE shell for strength and insulation; inner adhesive glue layer for a waterproof, airtight seal\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e6 Size Options\u003c\/strong\u003e – Available in 4mm, 6mm, 8mm, 12mm, 16mm, and 20mm to suit a wide variety of wire gauges and connector types\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMoisture \u0026amp; Corrosion Resistant\u003c\/strong\u003e – Hot-melt adhesive flows into gaps upon heating, protecting against water ingress and oxidation\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eElectrical Insulation\u003c\/strong\u003e – Provides reliable dielectric protection for wire joints, terminals, and cable repairs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePE Material\u003c\/strong\u003e – Durable, flexible, and resistant to common chemicals and UV exposure\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Application\u003c\/strong\u003e – Perfect for automotive, marine, aerospace, electronics, and home DIY wiring projects\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Polyethylene (PE) with inner 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 Sizes (Inner Diameter):\u003c\/strong\u003e 4mm, 6mm, 8mm, 12mm, 16mm, 20mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Dual Wall Heat Shrinkable Tubing\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 Mainland China\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eHow to Use\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eSelect the appropriate tube diameter for your cable or connector\u003c\/li\u003e\n  \u003cli\u003eSlide the tubing over the area to be covered before connecting wires\u003c\/li\u003e\n  \u003cli\u003ePosition the tube over the joint or splice\u003c\/li\u003e\n  \u003cli\u003eApply even heat (heat gun recommended) and watch the tube shrink to form a tight, sealed barrier\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eRelated Products You May Like\u003c\/h2\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\/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  \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\u003c\/ul\u003e\n\n\u003cp\u003eFor more information on electrical insulation standards and safe wiring practices, 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\/Heat-shrink_tubing\" target=\"_blank\" rel=\"noopener\"\u003eHeat-shrink tubing\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 has a 4:1 shrink ratio, meaning it shrinks down to one quarter of its original inner diameter when heat is applied. This makes it ideal for covering a wide range of cable and connector sizes with a single tube diameter.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Does this heat shrink tubing provide a waterproof seal?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The dual wall design features an outer polyethylene shell and an inner layer of hot-melt adhesive. When heated, the adhesive melts and flows around the cable or connector, creating a waterproof, moisture-resistant seal — perfect for marine, automotive, and outdoor electrical applications.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What sizes are available and how do I choose the right one?\u003c\/h4\u003e\n\u003cp\u003eA: This tubing is available in 4mm, 6mm, 8mm, 12mm, 16mm, and 20mm inner diameters. To choose the correct size, measure the outer diameter of the cable or connector you need to cover and select a tubing size that is slightly larger before shrinking — the 4:1 ratio ensures a tight fit after heating.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What tool is recommended for shrinking this tubing?\u003c\/h4\u003e\n\u003cp\u003eA: A heat gun is the recommended tool for shrinking this tubing evenly and efficiently. Apply heat gradually and move the gun along the length of the tube to ensure uniform shrinkage and proper adhesive flow throughout.\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 has a 4:1 shrink ratio, meaning it shrinks down to one quarter of its original inner diameter when heat is applied. This makes it ideal for covering a wide range of cable and connector sizes with a single tube diameter.\"}}, {\"@type\": \"Question\", \"name\": \"Does this heat shrink tubing provide a waterproof seal?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. The dual wall design features an outer polyethylene shell and an inner layer of hot-melt adhesive. When heated, the adhesive melts and flows around the cable or connector, creating a waterproof, moisture-resistant seal — perfect for marine, automotive, and outdoor electrical applications.\"}}, {\"@type\": \"Question\", \"name\": \"What sizes are available and how do I choose the right one?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This tubing is available in 4mm, 6mm, 8mm, 12mm, 16mm, and 20mm inner diameters. To choose the correct size, measure the outer diameter of the cable or connector you need to cover and select a tubing size that is slightly larger before shrinking — the 4:1 ratio ensures a tight fit after heating.\"}}, {\"@type\": \"Question\", \"name\": \"What tool is recommended for shrinking this tubing?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"A heat gun is the recommended tool for shrinking this tubing evenly and efficiently. Apply heat gradually and move the gun along the length of the tube to ensure uniform shrinkage and proper adhesive flow throughout.\"}}]}\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 Heat Shrink Tubing with Glue 4–20mm | 4:1 Ratio\", \"item\": \"https:\/\/oasis-select.com\/products\/dual-wall-heat-shrink-tubing-glue-4-6-8-12-16-20mm-electrical-insulation\"}]}\u003c\/script\u003e","brand":"Oasis Select","offers":[{"title":"black \/ 4mm","offer_id":47727706439785,"sku":"100006028:201336457;14:193","price":9.19,"currency_code":"USD","in_stock":true},{"title":"black \/ 12mm","offer_id":47727706472553,"sku":"100006028:100016944;14:193","price":9.16,"currency_code":"USD","in_stock":true},{"title":"black \/ 8mm","offer_id":47727706505321,"sku":"100006028:100016941;14:193","price":9.16,"currency_code":"USD","in_stock":true},{"title":"black \/ 6mm","offer_id":47727706538089,"sku":"100006028:100016940;14:193","price":9.16,"currency_code":"USD","in_stock":true},{"title":"black \/ 16mm","offer_id":47727706570857,"sku":"100006028:3269250#16mm;14:193","price":9.16,"currency_code":"USD","in_stock":true},{"title":"black \/ 20 mm","offer_id":47727706603625,"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_0c2d4a61-0a20-4b9a-9c3d-5b68e5692c6e.webp?v=1782670824","url":"https:\/\/oasis-select.com\/products\/dual-wall-heat-shrink-tubing-glue-4-6-8-12-16-20mm-electrical-insulation","provider":"Oasis Select","version":"1.0","type":"link"}