{"product_id":"4-1-glue-lined-heat-shrink-tubing-4mm-waterproof","title":"4:1 Adhesive Glue-Lined Heat Shrink Tubing – 4mm ID, Waterproof","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003e4:1 Glue-Lined Heat Shrink Tubing — Waterproof Protection for Wires and Connectors\u003c\/h2\u003e\n\u003cp\u003eExposed wire splices, corroded terminals, and leaking connector seals are a constant headache for automotive technicians, marine electricians, and serious DIYers. One failed seal can mean hours of fault-finding. This 4:1 adhesive glue-lined heat shrink tubing delivers a reliable, watertight barrier that standard single-wall tubing simply cannot match.\u003c\/p\u003e\n\u003cp\u003eEach piece is a dual-wall construction: an outer polyolefin sleeve paired with an inner hot-melt adhesive lining. The supplied inner diameter is 4mm (approximately 5\/32\"), and the 4:1 shrink ratio means it contracts down to approximately 1mm (approximately 3\/64\") when heat is applied — gripping tightly around wires, terminals, and connector bodies. Available in lengths of 1 m (approximately 3.3 ft), 2 m (approximately 6.6 ft), 5 m (approximately 16.4 ft), and 10 m (approximately 32.8 ft), and in five colors: Black, White, Red, Blue, and Transparent.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include sealing automotive wiring harness splices to prevent moisture intrusion, protecting marine-grade cable terminations from saltwater corrosion, and securing DIY electrical connections in outdoor lighting or solar installations — all scenarios where a long-lasting waterproof wire connector seal is critical.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e🔌\u003c\/span\u003e Compatible with standard wire gauges and connector bodies up to 4mm diameter. Fits most automotive, marine, and low-voltage electrical applications. Verify your substrate diameter before ordering.\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 Liner\u003c\/strong\u003e — The inner hot-melt glue flows and seals on shrinking, creating a moisture-proof barrier ideal for marine cable sealing and outdoor electrical connections.\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 4mm down to approximately 1mm ID, accommodating a wider range of wire and terminal sizes than standard 2:1 tubing.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎨\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eFive Color Options\u003c\/strong\u003e — Black, White, Red, Blue, and Transparent allow color-coded wiring identification and circuit tracing in automotive and electrical harness builds.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eFlexible Length Selection\u003c\/strong\u003e — Choose from 1 m, 2 m, 5 m, or 10 m rolls to match your project scale, from a single splice repair to a full wiring harness installation.\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 outer sleeve resists abrasion, UV exposure, and common chemicals, making it suitable for under-hood automotive environments and direct-burial cable protection.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚡\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eElectrical Insulation and Strain Relief\u003c\/strong\u003e — Provides dielectric insulation at the splice point and mechanical strain relief, reducing the risk of wire fatigue and intermittent faults in vibration-prone installations.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e📐 Technical Specifications — 4:1 Dual-Wall 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\u003eSupplied Inner Diameter\u003c\/th\u003e\n\u003ctd\u003e4mm (approximately 5\/32\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRecovered Inner Diameter\u003c\/th\u003e\n\u003ctd\u003eApproximately 1mm (approximately 3\/64\") — varies by substrate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWall Construction\u003c\/th\u003e\n\u003ctd\u003eDual-wall: outer polyolefin + inner hot-melt adhesive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Lengths\u003c\/th\u003e\n\u003ctd\u003e1 m (approximately 3.3 ft) \/ 2 m (approximately 6.6 ft) \/ 5 m (approximately 16.4 ft) \/ 10 m (approximately 32.8 ft)\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\u003eActivation Temperature\u003c\/th\u003e\n\u003ctd\u003eSee variant options — typically 70C–110C (158F–230F)\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\u003eWaterproof \/ Moisture Seal\u003c\/th\u003e\n\u003ctd\u003eYes — adhesive liner creates watertight seal on recovery\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTypical Applications\u003c\/th\u003e\n\u003ctd\u003eAutomotive wiring, marine electronics, outdoor electrical, DIY cable repair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCompliance\u003c\/th\u003e\n\u003ctd\u003eContact us to confirm specific certifications\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 Activation temperature and exact recovered diameter may vary by color and batch. If your application has strict tolerance requirements, please contact us to confirm specifications before ordering.\u003c\/div\u003e\n\u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-faq\"\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat length of heat shrink tubing do I need?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMeasure the section you need to cover and add at least 10–15% extra for overlap. For most wire splices and connector sealing, 1–2 metres is generally sufficient. For longer cable runs or harness builds, the 5 m or 10 m rolls are typically more economical. As a reference: 1 metre is approximately 3.3 ft, 5 metres is approximately 16.4 ft.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow strong is the adhesive bond after shrinking?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe inner glue layer melts and flows during shrinking, creating a mechanical and adhesive seal around the substrate. This bond is generally strong enough to resist vibration, moisture ingress, and moderate pulling forces in most electrical and automotive applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan this tubing be used outdoors or in marine environments?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. The glue-lined dual-wall construction creates a watertight seal that is typically suitable for outdoor, marine, and underground cable applications. The adhesive liner prevents moisture from wicking along the wire — a common failure point with standard single-wall tubing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the shrink ratio and what does 4:1 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 supplied inner diameter when heat is applied. For this product, the 4mm supplied ID shrinks down to approximately 1mm, allowing it to fit tightly over a wide range of wire gauges and connector bodies — far more versatile than standard 2:1 tubing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat heat source should I use to shrink this tubing?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eA heat gun is the recommended tool. Apply heat evenly by moving the gun along the tubing rather than holding it in one spot. In most cases, temperatures between 70C–110C (158F–230F) are sufficient to activate the adhesive and achieve full shrinkage. Avoid open flames, which can scorch or unevenly shrink the tubing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhich wire gauges or connector sizes does 4mm ID tubing fit?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eBefore shrinking, 4mm inner diameter generally accommodates wire bundles, connectors, and terminals up to approximately 4mm in diameter. After shrinking at 4:1 ratio, it grips substrates down to roughly 1mm. Check your connector or wire bundle diameter before ordering to confirm fit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs this tubing RoHS compliant and safe for automotive use?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThis dual-wall heat shrink tubing is generally manufactured to meet common electrical safety standards and is typically used in automotive wiring harnesses, marine electronics, and DIY electrical projects. Contact us to confirm specific compliance certifications for your application.\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 \/ φ4mm \/ 1 Metre","offer_id":52330366959890,"sku":"GYWXWGLBZSJ000491x1","price":2.3,"currency_code":"USD","in_stock":true},{"title":"White \/ φ4mm \/ 1 Metre","offer_id":52330366992658,"sku":"GYWXWGLBZSJ000492x1","price":2.46,"currency_code":"USD","in_stock":true},{"title":"Red \/ φ4mm \/ 1 Metre","offer_id":52330367025426,"sku":"GYWXWGLBZSJ000493x1","price":2.46,"currency_code":"USD","in_stock":true},{"title":"Blue \/ φ4mm \/ 1 Metre","offer_id":52330367058194,"sku":"GYWXWGLBZSJ000494x1","price":2.46,"currency_code":"USD","in_stock":true},{"title":"Transparent \/ φ4mm \/ 1 Metre","offer_id":52330367090962,"sku":"GYWXWGLBZSJ000495x1","price":2.46,"currency_code":"USD","in_stock":true},{"title":"Black \/ φ4mm \/ 2 Metre","offer_id":52330367123730,"sku":"GYWXWGLBZSJ000491x2","price":3.05,"currency_code":"USD","in_stock":true},{"title":"White \/ φ4mm \/ 2 Metre","offer_id":52330367156498,"sku":"GYWXWGLBZSJ000492x2","price":3.33,"currency_code":"USD","in_stock":true},{"title":"Red \/ φ4mm \/ 2 Metre","offer_id":52330367189266,"sku":"GYWXWGLBZSJ000493x2","price":3.33,"currency_code":"USD","in_stock":true},{"title":"Blue \/ φ4mm \/ 2 Metre","offer_id":52330367222034,"sku":"GYWXWGLBZSJ000494x2","price":3.33,"currency_code":"USD","in_stock":true},{"title":"Transparent \/ φ4mm \/ 2 Metre","offer_id":52330367254802,"sku":"GYWXWGLBZSJ000495x2","price":3.33,"currency_code":"USD","in_stock":true},{"title":"Black \/ φ4mm \/ 5 Metre","offer_id":52330367287570,"sku":"GYWXWGLBZSJ000491x5","price":5.81,"currency_code":"USD","in_stock":true},{"title":"White \/ φ4mm \/ 5 Metre","offer_id":52330367320338,"sku":"GYWXWGLBZSJ000492x5","price":6.53,"currency_code":"USD","in_stock":true},{"title":"Red \/ φ4mm \/ 5 Metre","offer_id":52330367353106,"sku":"GYWXWGLBZSJ000493x5","price":6.53,"currency_code":"USD","in_stock":true},{"title":"Blue \/ φ4mm \/ 5 Metre","offer_id":52330367385874,"sku":"GYWXWGLBZSJ000494x5","price":6.53,"currency_code":"USD","in_stock":true},{"title":"Transparent \/ φ4mm \/ 5 Metre","offer_id":52330367418642,"sku":"GYWXWGLBZSJ000495x5","price":6.53,"currency_code":"USD","in_stock":true},{"title":"Black \/ φ4mm \/ 10 Metre","offer_id":52330367451410,"sku":"GYWXWGLBZSJ000491x10","price":10.88,"currency_code":"USD","in_stock":true},{"title":"White \/ φ4mm \/ 10 Metre","offer_id":52330367484178,"sku":"GYWXWGLBZSJ000492x10","price":12.32,"currency_code":"USD","in_stock":true},{"title":"Red \/ φ4mm \/ 10 Metre","offer_id":52330367516946,"sku":"GYWXWGLBZSJ000493x10","price":12.32,"currency_code":"USD","in_stock":true},{"title":"Blue \/ φ4mm \/ 10 Metre","offer_id":52330367549714,"sku":"GYWXWGLBZSJ000494x10","price":12.32,"currency_code":"USD","in_stock":true},{"title":"Transparent \/ φ4mm \/ 10 Metre","offer_id":52330367582482,"sku":"GYWXWGLBZSJ000495x10","price":12.32,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture1of14_19614f8c-0966-49de-91d5-4f698ad52608.jpg?v=1780898235","url":"https:\/\/homediyer.com\/de\/products\/4-1-glue-lined-heat-shrink-tubing-4mm-waterproof","provider":"HomeDIYer","version":"1.0","type":"link"}