{"product_id":"4-1-adhesive-heat-shrink-tubing-12mm-glue-lined-waterproof-sleeving","title":"4:1 Adhesive Heat Shrink Tubing 12mm – Glue Lined Waterproof Sleeving","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003e4:1 Adhesive Heat Shrink Tubing 12mm — Waterproof Glue-Lined Protection for Wires \u0026amp; Connectors\u003c\/h2\u003e\n\u003cp\u003eExposed wire splices and unprotected connectors are a leading cause of electrical failures in automotive, marine, and outdoor installations. Whether you're a professional electrician, a weekend DIYer tackling a trailer rewire, or a hobbyist building a custom electronics project, you need a sleeving solution that seals out moisture and stays put under vibration and heat.\u003c\/p\u003e\n\u003cp\u003eThis 4:1 adhesive heat shrink tubing features a φ12mm (≈15\/32\") inner diameter before shrinking, recovering to approximately φ3mm (≈1\/8\") after full heat activation. Each order is available in cut lengths of 1 metre (≈39\"), 2 metres (≈79\"), 5 metres (≈197\"), or 10 metres (≈394\"), in five colors: Black, White, Red, Blue, and Transparent. The dual-wall construction combines a flexible polyolefin outer layer with a hot-melt adhesive inner lining that flows into voids and creates a moisture-resistant seal around the substrate.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include automotive wiring harness repairs where corrosion-resistant wire splicing is critical, marine electrical connections exposed to salt spray and humidity, and outdoor low-voltage lighting or irrigation control wiring where long-term waterproof cable protection is required.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e🔌\u003c\/span\u003e \u003cstrong\u003eCompatibility:\u003c\/strong\u003e Fits wire bundles and connectors up to approximately 11.5mm in diameter. Shrinks to ≈3mm recovered ID. Compatible with standard heat guns (90–135°C \/ 194–275°F activation range). Not recommended for use with open flame torches on sensitive substrates.\u003c\/div\u003e\n\u003ch2\u003e✅ Key Features of These 4:1 Glue-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 Adhesive Inner Lining\u003c\/strong\u003e — The hot-melt glue layer melts and flows during shrinking, sealing around wires and connectors to block moisture ingress — ideal for waterproof wire splice protection in marine and outdoor wiring.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003e4:1 Shrink Ratio\u003c\/strong\u003e — Shrinks from φ12mm down to approximately φ3mm, giving you a wide fit range that covers everything from thin wire bundles to bulky connector bodies without needing multiple tube sizes.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎨\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003e5 Color Options for Circuit Identification\u003c\/strong\u003e — Available in Black, White, Red, Blue, and Transparent so you can color-code circuits, polarity, or signal types — a practical advantage in complex automotive or control panel wiring.\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 — Choose from 1m, 2m, 5m, or 10m rolls and cut exactly what you need. No waste, no leftover spools — especially useful for glue-lined heat shrink tubing used in one-off repair jobs.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔥\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eDual-Wall Polyolefin Construction\u003c\/strong\u003e — The flexible outer wall resists cracking, UV exposure, and abrasion, while the inner adhesive layer bonds firmly to the substrate — providing durable insulation sleeving for long-term installations.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚡\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eElectrical Insulation \u0026amp; Strain Relief\u003c\/strong\u003e — Provides a secondary layer of electrical insulation over splices and solder joints, and the shrunk adhesive adds mechanical strain relief to reduce flex fatigue at connection points.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e📐 Technical Specifications — 4:1 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\u003e4:1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInner Diameter (Before Shrink)\u003c\/th\u003e\n\u003ctd\u003eφ12mm (≈15\/32\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRecovered Inner Diameter (After Shrink)\u003c\/th\u003e\n\u003ctd\u003eApproximately φ3mm (≈1\/8\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Lengths\u003c\/th\u003e\n\u003ctd\u003e1m (≈39\"), 2m (≈79\"), 5m (≈197\"), 10m (≈394\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Colors\u003c\/th\u003e\n\u003ctd\u003eBlack, White, Red, Blue, Transparent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOuter Layer Material\u003c\/th\u003e\n\u003ctd\u003eFlexible Polyolefin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInner Lining\u003c\/th\u003e\n\u003ctd\u003eHot-Melt Adhesive (Glue-Lined)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eShrink Temperature\u003c\/th\u003e\n\u003ctd\u003eTypically 90–135°C (194–275°F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWall Thickness (Before Shrink)\u003c\/th\u003e\n\u003ctd\u003eSee variant options\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\u003eVoltage Rating\u003c\/th\u003e\n\u003ctd\u003eContact us to confirm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eAutomotive, Marine, Outdoor, Electronics, DIY Wiring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-note\"\u003e\n\u003cspan class=\"hdiy-note-icon\"\u003e⚠️\u003c\/span\u003e \u003cstrong\u003eNote:\u003c\/strong\u003e Wall thickness and voltage rating vary by production batch. If your application has specific electrical or mechanical requirements, please contact us before ordering to confirm specifications.\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 length of heat shrink tubing?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMeasure the total cable run or splice area you need to cover, then add at least 10–15% extra for overlap and trimming. For a single wire splice, 1 metre (≈39\") is generally sufficient. For wiring harnesses or longer conduit runs, 5 or 10 metre rolls are more economical. As a quick reference: 25mm (1\") of tubing typically covers a standard butt splice connector.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat does 4:1 shrink ratio mean?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eA 4:1 shrink ratio means the tubing shrinks to one-quarter of its original inner diameter when heat is applied. Starting at φ12mm, it typically recovers down to approximately φ3mm, allowing it to grip a wide range of wire gauges and connector bodies securely — without needing to stock multiple tube sizes for different wire diameters.\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 use?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. The inner adhesive lining melts during shrinking and flows around the substrate, creating a moisture-resistant seal. It is generally suitable for outdoor, marine, and automotive environments where moisture ingress is a concern. For fully submerged or high-pressure water exposure, confirm suitability with your specific application requirements before installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat wire gauges or connector sizes fit inside the 12mm tubing?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe 12mm inner diameter (before shrinking) typically accommodates wire bundles, connectors, or cable jackets up to about 11–11.5mm in diameter. After full shrink, the recovered diameter is approximately 3mm. Always measure your substrate's outer diameter before ordering to confirm the tubing will fit over it and recover tightly onto it.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat temperature is needed to shrink this tubing?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eGlue-lined polyolefin heat shrink tubing generally begins to shrink at around 90°C (194°F) and fully activates the adhesive at approximately 120–135°C (248–275°F). A heat gun is strongly recommended over an open flame for even, controlled shrinking — especially on sensitive electronics or near plastic connectors.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use this tubing in automotive or marine wiring?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. The adhesive-lined construction is commonly used in automotive wiring repairs, marine electrical connections, and trailer wiring because it resists vibration, moisture, and corrosion. Confirm that the operating temperature range of your application falls within the tubing's rated limits before installation in high-heat engine bay locations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDoes the color affect performance?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eNo. All five color options — Black, White, Red, Blue, and Transparent — share the same 4:1 shrink ratio, adhesive lining, and wall thickness. Color choice is typically used for circuit identification, polarity coding, or aesthetic preference. Transparent is particularly useful when you want to visually inspect the connection after shrinking.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your color and length above, then add to cart — ships from our US warehouse.\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HomeDIYer","offers":[{"title":"Black \/ φ12mm \/ 1 Metre","offer_id":52330368925970,"sku":"GYWXWGLBZSJ000506x1","price":3.52,"currency_code":"USD","in_stock":true},{"title":"White \/ φ12mm \/ 1 Metre","offer_id":52330368958738,"sku":"GYWXWGLBZSJ000507x1","price":3.93,"currency_code":"USD","in_stock":true},{"title":"Red \/ φ12mm \/ 1 Metre","offer_id":52330368991506,"sku":"GYWXWGLBZSJ000508x1","price":3.93,"currency_code":"USD","in_stock":true},{"title":"Blue \/ φ12mm \/ 1 Metre","offer_id":52330369024274,"sku":"GYWXWGLBZSJ000509x1","price":3.93,"currency_code":"USD","in_stock":true},{"title":"Transparent \/ φ12mm \/ 1 Metre","offer_id":52330369057042,"sku":"GYWXWGLBZSJ000510x1","price":3.93,"currency_code":"USD","in_stock":true},{"title":"Black \/ φ12mm \/ 2 Metre","offer_id":52330369089810,"sku":"GYWXWGLBZSJ000506x2","price":6.45,"currency_code":"USD","in_stock":true},{"title":"White \/ φ12mm \/ 2 Metre","offer_id":52330369122578,"sku":"GYWXWGLBZSJ000507x2","price":7.14,"currency_code":"USD","in_stock":true},{"title":"Red \/ φ12mm \/ 2 Metre","offer_id":52330369155346,"sku":"GYWXWGLBZSJ000508x2","price":7.14,"currency_code":"USD","in_stock":true},{"title":"Blue \/ φ12mm \/ 2 Metre","offer_id":52330369188114,"sku":"GYWXWGLBZSJ000509x2","price":7.14,"currency_code":"USD","in_stock":true},{"title":"Transparent \/ φ12mm \/ 2 Metre","offer_id":52330369220882,"sku":"GYWXWGLBZSJ000510x2","price":7.14,"currency_code":"USD","in_stock":true},{"title":"Black \/ φ12mm \/ 5 Metre","offer_id":52330369253650,"sku":"GYWXWGLBZSJ000506x5","price":15.01,"currency_code":"USD","in_stock":true},{"title":"White \/ φ12mm \/ 5 Metre","offer_id":52330369286418,"sku":"GYWXWGLBZSJ000507x5","price":16.74,"currency_code":"USD","in_stock":true},{"title":"Red \/ φ12mm \/ 5 Metre","offer_id":52330369319186,"sku":"GYWXWGLBZSJ000508x5","price":16.74,"currency_code":"USD","in_stock":true},{"title":"Blue \/ φ12mm \/ 5 Metre","offer_id":52330369351954,"sku":"GYWXWGLBZSJ000509x5","price":16.74,"currency_code":"USD","in_stock":true},{"title":"Transparent \/ φ12mm \/ 5 Metre","offer_id":52330369384722,"sku":"GYWXWGLBZSJ000510x5","price":16.74,"currency_code":"USD","in_stock":true},{"title":"Black \/ φ12mm \/ 10 Metre","offer_id":52330369417490,"sku":"GYWXWGLBZSJ000506x10","price":29.28,"currency_code":"USD","in_stock":true},{"title":"White \/ φ12mm \/ 10 Metre","offer_id":52330369450258,"sku":"GYWXWGLBZSJ000507x10","price":32.74,"currency_code":"USD","in_stock":true},{"title":"Red \/ φ12mm \/ 10 Metre","offer_id":52330369483026,"sku":"GYWXWGLBZSJ000508x10","price":32.74,"currency_code":"USD","in_stock":true},{"title":"Blue \/ φ12mm \/ 10 Metre","offer_id":52330369515794,"sku":"GYWXWGLBZSJ000509x10","price":32.74,"currency_code":"USD","in_stock":true},{"title":"Transparent \/ φ12mm \/ 10 Metre","offer_id":52330369548562,"sku":"GYWXWGLBZSJ000510x10","price":32.74,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture1of11_cce5f280-ff21-4585-9e0e-7b89afdfaa7e.jpg?v=1780901398","url":"https:\/\/homediyer.com\/products\/4-1-adhesive-heat-shrink-tubing-12mm-glue-lined-waterproof-sleeving","provider":"HomeDIYer","version":"1.0","type":"link"}