{"product_id":"9mm-heat-shrink-tubing-2-1-wire-insulation-sleeve","title":"9mm Heat Shrink Tubing 2:1 Ratio – Electrical Wire Insulation Sleeve, 7 Colors","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003e9mm Heat Shrink Tubing — Reliable Wire Insulation for Automotive \u0026amp; DIY Electrical Projects\u003c\/h2\u003e\n\u003cp\u003eWhether you're rewiring a car harness, repairing a marine electrical system, or tidying up a home workshop project, exposed or damaged wire insulation is a safety hazard you can't ignore. This 9mm heat shrink tubing is designed for hobbyists, auto technicians, and electricians who need a fast, clean, and durable solution for wire protection and cable management.\u003c\/p\u003e\n\u003cp\u003eEach order includes your chosen length of polyolefin heat shrink tubing in a 9mm (≈3\/8\") inner diameter with a 2:1 shrink ratio — meaning it shrinks to approximately 4.5mm once heat is applied. Available in lengths of 1 metre (≈39\"), 2 metres (≈79\"), 5 metres (≈197\"), and 10 metres (≈394\"), and in 7 colors: Black, White, Red, Green, Yellow, Blue, and Transparent.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include automotive wire splicing and connector insulation, marine and RV electrical repairs, color-coded circuit identification in control panels, and general DIY electrical cable wrap for home or workshop projects.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003eℹ️\u003c\/span\u003e \u003cstrong\u003eCompatibility:\u003c\/strong\u003e Fits wires and connectors with an outer diameter up to approximately 8–8.5mm. Shrinks to ~4.5mm after heat application. Suitable for automotive, marine, household, and low-voltage electrical wiring applications.\u003c\/div\u003e\n\u003ch2\u003e✅ Key Features of These 9mm Heat Shrink Tubing Sleeves\u003c\/h2\u003e\n\u003cul class=\"hdiy-features\"\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔥\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003e2:1 Shrink Ratio\u003c\/strong\u003e — Shrinks to approximately half its original diameter for a snug, secure fit around wires, connectors, and cable bundles up to ~8.5mm OD.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eFlame-Retardant Polyolefin Material\u003c\/strong\u003e — Made from polyolefin, which is generally flame-retardant and rated for continuous use in automotive and marine heat shrink tubing applications.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎨\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003e7 Color Options for Easy Wire Identification\u003c\/strong\u003e — Black, White, Red, Green, Yellow, Blue, and Transparent allow color-coded wiring that meets standard electrical labeling practices.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003e4 Length Options\u003c\/strong\u003e — Choose 1m, 2m, 5m, or 10m to match your project scale, from a single repair to a full vehicle rewire or workshop stock.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e💧\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eMoisture-Resistant Insulation\u003c\/strong\u003e — Once properly shrunk, the tubing creates a tight seal that resists moisture, dust, and abrasion — suitable for outdoor and under-hood electrical wire wrap use.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚡\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eBroad Application Range\u003c\/strong\u003e — Works for automotive wiring harness repair, marine electrical systems, DIY electronics, and color-coded cable management in control panels or junction boxes.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e📐 Technical Specifications — 9mm 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\u003eHeat Shrink Tubing \/ Wire Insulation Sleeve\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInner Diameter (Before Shrink)\u003c\/th\u003e\n\u003ctd\u003e9mm (≈3\/8\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInner Diameter (After Shrink)\u003c\/th\u003e\n\u003ctd\u003eTypically ~4.5mm (≈3\/16\") at 2:1 ratio\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eShrink Ratio\u003c\/th\u003e\n\u003ctd\u003e2:1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003ePolyolefin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFlame Retardancy\u003c\/th\u003e\n\u003ctd\u003eGenerally flame-retardant (polyolefin standard)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOperating Temperature\u003c\/th\u003e\n\u003ctd\u003eTypically up to 125°C (257°F) continuous\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eActivation Temperature\u003c\/th\u003e\n\u003ctd\u003eTypically 70–120°C (158–248°F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Colors\u003c\/th\u003e\n\u003ctd\u003eBlack, White, Red, Green, Yellow, Blue, Transparent\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\u003eRecommended Tool\u003c\/th\u003e\n\u003ctd\u003eHeat gun (lighter or hair dryer may work for small sections)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTypical Applications\u003c\/th\u003e\n\u003ctd\u003eAutomotive, marine, DIY electrical, cable management\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWall Thickness (After Shrink)\u003c\/th\u003e\n\u003ctd\u003eSee variant options \/ Contact us to confirm\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 after shrink and exact voltage rating vary by production batch. If your application has specific electrical rating requirements, please contact us to confirm 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 of wire or connector you need to cover, then add at least 10–15% extra for overlap on each end. For most automotive or household wiring repairs, 1m (≈39\") is sufficient for a single job, while 5m or 10m rolls are better for larger projects or repeated use.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat does 2:1 shrink ratio mean?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eA 2:1 ratio means the tubing shrinks to approximately half its original inner diameter when heat is applied. This 9mm tubing will typically shrink down to around 4.5mm (≈3\/16\"), creating a snug, insulating fit around the wire or connector.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow much heat is needed to shrink this tubing?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003ePolyolefin heat shrink tubing generally activates at temperatures around 70–120°C (158–248°F). A heat gun is the recommended tool for even, controlled shrinkage. In a pinch, a lighter or hair dryer may work for small sections, but a heat gun gives the most consistent results.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs this heat shrink tubing flame-retardant and safe for automotive use?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003ePolyolefin heat shrink tubing is generally flame-retardant and widely used in automotive, marine, and general electrical applications. It typically withstands continuous operating temperatures up to 125°C (257°F). Always verify your specific application requirements — particularly for high-voltage or safety-critical circuits — before use.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use this tubing outdoors or in wet environments?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eStandard polyolefin heat shrink tubing provides good moisture resistance once properly shrunk onto a wire, making it generally suitable for outdoor and damp environments. For fully waterproof applications such as submersion or direct water exposure, adhesive-lined (dual-wall) heat shrink tubing is typically recommended instead.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat wire gauge or cable size does 9mm heat shrink tubing fit?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eWith a 9mm inner diameter before shrinking, this tubing typically fits wire bundles, connectors, or cables with an outer diameter up to approximately 8–8.5mm. After shrinking at a 2:1 ratio, it will conform tightly to items around 4–5mm in diameter. Always measure your wire or connector OD before selecting a size.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhy are there different colors available, and which should I choose?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eColor-coded heat shrink tubing makes it easy to identify wires by circuit, voltage level, or function — a standard practice in automotive, marine, and industrial wiring. Common conventions include red for positive\/power, black for ground\/negative, and other colors for signal or auxiliary circuits. Choose Transparent if you need to see the wire or connector underneath.\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 \/ φ9mm \/ 1 Metre","offer_id":52330375512338,"sku":"GYWXWGLBZSJ000107x1","price":1.35,"currency_code":"USD","in_stock":true},{"title":"White \/ φ9mm \/ 1 Metre","offer_id":52330375545106,"sku":"GYWXWGLBZSJ000108x1","price":1.81,"currency_code":"USD","in_stock":true},{"title":"Red \/ φ9mm \/ 1 Metre","offer_id":52330375577874,"sku":"GYWXWGLBZSJ000109x1","price":1.81,"currency_code":"USD","in_stock":true},{"title":"Green \/ φ9mm \/ 1 Metre","offer_id":52330375610642,"sku":"GYWXWGLBZSJ000110x1","price":1.81,"currency_code":"USD","in_stock":true},{"title":"Yellow \/ φ9mm \/ 1 Metre","offer_id":52330375643410,"sku":"GYWXWGLBZSJ000111x1","price":1.81,"currency_code":"USD","in_stock":true},{"title":"Blue \/ φ9mm \/ 1 Metre","offer_id":52330375676178,"sku":"GYWXWGLBZSJ000112x1","price":1.81,"currency_code":"USD","in_stock":true},{"title":"Transparent \/ φ9mm \/ 1 Metre","offer_id":52330375708946,"sku":"GYWXWGLBZSJ000113x1","price":1.81,"currency_code":"USD","in_stock":true},{"title":"Black \/ φ9mm \/ 2 Metre","offer_id":52330375741714,"sku":"GYWXWGLBZSJ000107x2","price":1.93,"currency_code":"USD","in_stock":true},{"title":"White \/ φ9mm \/ 2 Metre","offer_id":52330375774482,"sku":"GYWXWGLBZSJ000108x2","price":2.01,"currency_code":"USD","in_stock":true},{"title":"Red \/ φ9mm \/ 2 Metre","offer_id":52330375807250,"sku":"GYWXWGLBZSJ000109x2","price":2.01,"currency_code":"USD","in_stock":true},{"title":"Green \/ φ9mm \/ 2 Metre","offer_id":52330375840018,"sku":"GYWXWGLBZSJ000110x2","price":2.01,"currency_code":"USD","in_stock":true},{"title":"Yellow \/ φ9mm \/ 2 Metre","offer_id":52330375872786,"sku":"GYWXWGLBZSJ000111x2","price":2.01,"currency_code":"USD","in_stock":true},{"title":"Blue \/ φ9mm \/ 2 Metre","offer_id":52330375905554,"sku":"GYWXWGLBZSJ000112x2","price":2.01,"currency_code":"USD","in_stock":true},{"title":"Transparent \/ φ9mm \/ 2 Metre","offer_id":52330375938322,"sku":"GYWXWGLBZSJ000113x2","price":2.01,"currency_code":"USD","in_stock":true},{"title":"Black \/ φ9mm \/ 5 Metre","offer_id":52330375971090,"sku":"GYWXWGLBZSJ000107x5","price":3.71,"currency_code":"USD","in_stock":true},{"title":"White \/ φ9mm \/ 5 Metre","offer_id":52330376003858,"sku":"GYWXWGLBZSJ000108x5","price":3.93,"currency_code":"USD","in_stock":true},{"title":"Red \/ φ9mm \/ 5 Metre","offer_id":52330376036626,"sku":"GYWXWGLBZSJ000109x5","price":3.93,"currency_code":"USD","in_stock":true},{"title":"Green \/ φ9mm \/ 5 Metre","offer_id":52330376069394,"sku":"GYWXWGLBZSJ000110x5","price":3.93,"currency_code":"USD","in_stock":true},{"title":"Yellow \/ φ9mm \/ 5 Metre","offer_id":52330376102162,"sku":"GYWXWGLBZSJ000111x5","price":3.93,"currency_code":"USD","in_stock":true},{"title":"Blue \/ φ9mm \/ 5 Metre","offer_id":52330376134930,"sku":"GYWXWGLBZSJ000112x5","price":3.93,"currency_code":"USD","in_stock":true},{"title":"Transparent \/ φ9mm \/ 5 Metre","offer_id":52330376167698,"sku":"GYWXWGLBZSJ000113x5","price":3.93,"currency_code":"USD","in_stock":true},{"title":"Black \/ φ9mm \/ 10 Metre","offer_id":52330376200466,"sku":"GYWXWGLBZSJ000107x10","price":6.7,"currency_code":"USD","in_stock":true},{"title":"White \/ φ9mm \/ 10 Metre","offer_id":52330376233234,"sku":"GYWXWGLBZSJ000108x10","price":7.14,"currency_code":"USD","in_stock":true},{"title":"Red \/ φ9mm \/ 10 Metre","offer_id":52330376266002,"sku":"GYWXWGLBZSJ000109x10","price":7.14,"currency_code":"USD","in_stock":true},{"title":"Green \/ φ9mm \/ 10 Metre","offer_id":52330376298770,"sku":"GYWXWGLBZSJ000110x10","price":7.14,"currency_code":"USD","in_stock":true},{"title":"Yellow \/ φ9mm \/ 10 Metre","offer_id":52330376331538,"sku":"GYWXWGLBZSJ000111x10","price":7.14,"currency_code":"USD","in_stock":true},{"title":"Blue \/ φ9mm \/ 10 Metre","offer_id":52330376364306,"sku":"GYWXWGLBZSJ000112x10","price":7.14,"currency_code":"USD","in_stock":true},{"title":"Transparent \/ φ9mm \/ 10 Metre","offer_id":52330376397074,"sku":"GYWXWGLBZSJ000113x10","price":7.14,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture_3_of_12_e527f85c-4be6-4e6e-8a35-d69f40578683.jpg?v=1780908492","url":"https:\/\/homediyer.com\/de\/products\/9mm-heat-shrink-tubing-2-1-wire-insulation-sleeve","provider":"HomeDIYer","version":"1.0","type":"link"}