{"product_id":"40mm-heat-shrink-tubing-2-1-ratio-wire-sleeve-electrical-cable-wrap","title":"40mm Heat Shrink Tubing 2:1 Ratio — Flexible Wire Sleeve for Electrical \u0026 Automotive Cable Wrap","description":"\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do I choose the right length of heat shrink tubing?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Measure the total cable run you need to cover and add 10–15% extra for overlap and trimming. For a single connector joint, 1 metre is typically sufficient. For wiring harnesses or longer runs, 5 or 10 metre rolls are generally more economical. Available lengths: 1m (≈3.3 ft), 2m (≈6.6 ft), 5m (≈16.4 ft), and 10m (≈32.8 ft).\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What does 2:1 shrink ratio mean?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"A 2:1 shrink ratio means the tubing shrinks to half its original inner diameter when heat is applied. This 40mm tubing will shrink down to approximately 20mm, conforming snugly around cables, connectors, or splices in that size range.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the minimum shrink temperature?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Polyolefin heat shrink tubing of this type typically begins shrinking at around 70–90°C (158–194°F) and fully recovers at approximately 120°C (248°F). A standard heat gun set to low or medium is generally sufficient — avoid open flames, which can cause uneven shrinkage or scorching.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can this heat shrink tubing be used outdoors or in automotive applications?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. Polyolefin heat shrink tubing is generally resistant to moisture, UV exposure, and common automotive fluids, making it suitable for outdoor wiring, engine bay cable management, trailer wiring, and marine electrical connections. For prolonged submersion, an adhesive-lined variant is typically recommended.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What cable or wire diameter fits inside 40mm heat shrink tubing?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The inner diameter before shrinking is 40mm (≈1.57\\\"). It is designed to fit over cables, conduit bundles, or connectors with an outer diameter up to approximately 38mm. After shrinking, it recovers to roughly 20mm. Always measure your cable bundle's outer diameter before selecting a size.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Does the color affect performance?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"No — all color variants (Black, White, Red, Green, Yellow, Blue, Transparent) share the same polyolefin material and 2:1 shrink ratio. Color selection is typically used for color-coding wiring circuits, phase identification in electrical panels, or simply for visual organization in DIY projects.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is this tubing RoHS compliant and halogen-free?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Polyolefin heat shrink tubing in this category is generally manufactured to be RoHS compliant and halogen-free. If compliance documentation is required for a specific project or industry application, please contact us to confirm before ordering.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003e40mm Heat Shrink Tubing — Reliable Insulation for Electrical \u0026amp; Automotive Cable Wrap\u003c\/h2\u003e\n    \u003cp\u003eLoose wire ends, exposed splices, and tangled cable bundles are a frustration for every DIYer, auto technician, and electrician. Whether you're rewiring a trailer, tidying up a home workshop, or protecting a marine electrical connection, having the right 40mm heat shrink tubing on hand makes the job cleaner, safer, and longer-lasting.\u003c\/p\u003e\n    \u003cp\u003eEach roll contains a continuous length of 2:1 ratio polyolefin heat shrink tubing with an inner diameter of 40mm (≈1.57\"). Available in lengths of 1m (≈3.3 ft), 2m (≈6.6 ft), 5m (≈16.4 ft), and 10m (≈32.8 ft), and in 7 colors — Black, White, Red, Green, Yellow, Blue, and Transparent — so you can color-code circuits or match your project's requirements. The tubing shrinks to approximately 20mm upon heat application, conforming snugly around cables, connectors, and splices.\u003c\/p\u003e\n    \u003cp\u003eTypical use cases include automotive wiring harness protection, bundling multi-conductor cables in control panels, insulating large-gauge wire splices in RV and trailer builds, and protecting conduit ends in outdoor electrical installations — all scenarios where a durable, flexible cable wire wrap is essential.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-compat\"\u003e\n    \u003cspan class=\"hdiy-compat-icon\"\u003eℹ️\u003c\/span\u003e\n    \u003cstrong\u003eCompatibility Note:\u003c\/strong\u003e This tubing fits cables and bundles with an outer diameter up to approximately 38mm before shrinking. Confirm your cable bundle's outer diameter before ordering. For smaller wire gauges, see our other heat shrink tubing sizes.\n  \u003c\/div\u003e\n\n  \u003ch2\u003e✅ Key Features of These 40mm 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 from 40mm down to approximately 20mm inner diameter, creating a firm, uniform fit around cables, connectors, and wire splices without gaps or loose ends.\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\u003c\/strong\u003e — Black, White, Red, Green, Yellow, Blue, and Transparent allow easy color-coding of electrical circuits, phase identification, and visual organization in automotive or DIY wiring projects.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eFour Length Options\u003c\/strong\u003e — Choose from 1m, 2m, 5m, or 10m rolls to match your project scale, from a single connector 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\u003ePolyolefin Construction\u003c\/strong\u003e — Flexible, moisture-resistant polyolefin material provides electrical insulation and mechanical protection for automotive cable wrap, outdoor wiring, and marine electrical connections.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e✂️\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eEasy to Cut and Apply\u003c\/strong\u003e — Cuts cleanly with standard scissors or a utility knife; shrinks evenly with a heat gun, making it straightforward to use for both first-time DIYers and experienced technicians.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🌡️\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eLow Activation Temperature\u003c\/strong\u003e — Typically begins shrinking at around 70–90°C (158–194°F), compatible with standard heat guns — no specialized equipment required for most electrical insulation sleeve applications.\u003c\/span\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003e📐 Technical Specifications — 40mm 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 \/ Electrical Insulation Sleeve\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eInner Diameter (Before Shrink)\u003c\/th\u003e\n\u003ctd\u003e40mm (≈1.57\")\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eInner Diameter (After Shrink)\u003c\/th\u003e\n\u003ctd\u003eApproximately 20mm (≈0.79\")\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\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 (≈3.3 ft) \/ 2m (≈6.6 ft) \/ 5m (≈16.4 ft) \/ 10m (≈32.8 ft)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eShrink Temperature\u003c\/th\u003e\n\u003ctd\u003eTypically 70–90°C (158–194°F) activation; full recovery at approx. 120°C (248°F)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eWall Thickness (After 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\u003eCompliance\u003c\/th\u003e\n\u003ctd\u003eContact us to confirm (RoHS \/ Halogen-free)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eAutomotive wiring, electrical insulation, cable bundling, DIY wire wrap\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-note\"\u003e\n    \u003cspan class=\"hdiy-note-icon\"\u003e⚠️\u003c\/span\u003e\n    \u003cstrong\u003eSizing Tip:\u003c\/strong\u003e Always measure the outer diameter of your cable bundle before selecting tubing. The cable bundle should be no larger than approximately 38mm OD to fit inside this 40mm tubing before shrinking.\n  \u003c\/div\u003e\n\n  \u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n  \u003cdiv class=\"hdiy-faq\"\u003e\n\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 you need to cover and add 10–15% extra for overlap and trimming. For a single connector joint, 1 metre is typically sufficient. For wiring harnesses or longer runs, 5 or 10 metre rolls are generally more economical. Available lengths: 1m (≈3.3 ft), 2m (≈6.6 ft), 5m (≈16.4 ft), and 10m (≈32.8 ft).\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\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 shrink ratio means the tubing shrinks to half its original inner diameter when heat is applied. This 40mm tubing will shrink down to approximately 20mm, conforming snugly around cables, connectors, or splices in that size range.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat is the minimum shrink temperature, and can I use a heat gun?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003ePolyolefin heat shrink tubing of this type typically begins shrinking at around 70–90°C (158–194°F) and fully recovers at approximately 120°C (248°F). A standard heat gun set to low or medium is generally sufficient — avoid open flames, which can cause uneven shrinkage or scorching.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan this heat shrink tubing be used outdoors or in automotive applications?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eYes. Polyolefin heat shrink tubing is generally resistant to moisture, UV exposure, and common automotive fluids, making it suitable for outdoor wiring, engine bay cable management, trailer wiring, and marine electrical connections. For prolonged submersion, an adhesive-lined variant is typically recommended.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat cable or wire diameter fits inside 40mm heat shrink tubing?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eThe inner diameter before shrinking is 40mm (≈1.57\"). It is designed to fit over cables, conduit bundles, or connectors with an outer diameter up to approximately 38mm. After shrinking, it recovers to roughly 20mm. Always measure your cable bundle's outer diameter before selecting a size.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eDoes the color affect performance or insulation strength?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eNo — all color variants (Black, White, Red, Green, Yellow, Blue, Transparent) share the same polyolefin material and 2:1 shrink ratio. Color selection is typically used for color-coding wiring circuits, phase identification in electrical panels, or simply for visual organization in DIY projects.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eIs this tubing RoHS compliant and halogen-free?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003ePolyolefin heat shrink tubing in this category is generally manufactured to be RoHS compliant and halogen-free. If compliance documentation is required for a specific project or industry application, please contact us to confirm before ordering.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-cta\"\u003e\n    🛒 Select your color and length above, then add to cart — ships from our US warehouse.\n  \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"HomeDIYer","offers":[{"title":"Black \/ φ40mm \/ 1 Metre","offer_id":52331117510930,"sku":"GYWXWGLBZSJ000212x1","price":4.07,"currency_code":"USD","in_stock":true},{"title":"White \/ φ40mm \/ 1 Metre","offer_id":52331117543698,"sku":"GYWXWGLBZSJ000213x1","price":4.16,"currency_code":"USD","in_stock":true},{"title":"Red \/ φ40mm \/ 1 Metre","offer_id":52331117576466,"sku":"GYWXWGLBZSJ000214x1","price":4.16,"currency_code":"USD","in_stock":true},{"title":"Green \/ φ40mm \/ 1 Metre","offer_id":52331117609234,"sku":"GYWXWGLBZSJ000215x1","price":4.16,"currency_code":"USD","in_stock":true},{"title":"Yellow \/ φ40mm \/ 1 Metre","offer_id":52331117642002,"sku":"GYWXWGLBZSJ000216x1","price":4.16,"currency_code":"USD","in_stock":true},{"title":"Blue \/ φ40mm \/ 1 Metre","offer_id":52331117674770,"sku":"GYWXWGLBZSJ000217x1","price":4.16,"currency_code":"USD","in_stock":true},{"title":"Transparent \/ φ40mm \/ 1 Metre","offer_id":52331117707538,"sku":"GYWXWGLBZSJ000218x1","price":4.16,"currency_code":"USD","in_stock":true},{"title":"Black \/ φ40mm \/ 2 Metre","offer_id":52331117740306,"sku":"GYWXWGLBZSJ000212x2","price":7.43,"currency_code":"USD","in_stock":true},{"title":"White \/ φ40mm \/ 2 Metre","offer_id":52331117773074,"sku":"GYWXWGLBZSJ000213x2","price":7.6,"currency_code":"USD","in_stock":true},{"title":"Red \/ φ40mm \/ 2 Metre","offer_id":52331117805842,"sku":"GYWXWGLBZSJ000214x2","price":7.6,"currency_code":"USD","in_stock":true},{"title":"Green \/ φ40mm \/ 2 Metre","offer_id":52331117838610,"sku":"GYWXWGLBZSJ000215x2","price":7.6,"currency_code":"USD","in_stock":true},{"title":"Yellow \/ φ40mm \/ 2 Metre","offer_id":52331117871378,"sku":"GYWXWGLBZSJ000216x2","price":7.6,"currency_code":"USD","in_stock":true},{"title":"Blue \/ φ40mm \/ 2 Metre","offer_id":52331117904146,"sku":"GYWXWGLBZSJ000217x2","price":7.6,"currency_code":"USD","in_stock":true},{"title":"Transparent \/ φ40mm \/ 2 Metre","offer_id":52331117936914,"sku":"GYWXWGLBZSJ000218x2","price":7.6,"currency_code":"USD","in_stock":true},{"title":"Black \/ φ40mm \/ 5 Metre","offer_id":52331117969682,"sku":"GYWXWGLBZSJ000212x5","price":17.46,"currency_code":"USD","in_stock":true},{"title":"White \/ φ40mm \/ 5 Metre","offer_id":52331118002450,"sku":"GYWXWGLBZSJ000213x5","price":17.9,"currency_code":"USD","in_stock":true},{"title":"Red \/ φ40mm \/ 5 Metre","offer_id":52331118035218,"sku":"GYWXWGLBZSJ000214x5","price":17.9,"currency_code":"USD","in_stock":true},{"title":"Green \/ φ40mm \/ 5 Metre","offer_id":52331118067986,"sku":"GYWXWGLBZSJ000215x5","price":17.9,"currency_code":"USD","in_stock":true},{"title":"Yellow \/ φ40mm \/ 5 Metre","offer_id":52331118100754,"sku":"GYWXWGLBZSJ000216x5","price":17.9,"currency_code":"USD","in_stock":true},{"title":"Blue \/ φ40mm \/ 5 Metre","offer_id":52331118133522,"sku":"GYWXWGLBZSJ000217x5","price":17.9,"currency_code":"USD","in_stock":true},{"title":"Transparent \/ φ40mm \/ 5 Metre","offer_id":52331118166290,"sku":"GYWXWGLBZSJ000218x5","price":17.9,"currency_code":"USD","in_stock":true},{"title":"Black \/ φ40mm \/ 10 Metre","offer_id":52331118199058,"sku":"GYWXWGLBZSJ000212x10","price":34.18,"currency_code":"USD","in_stock":true},{"title":"White \/ φ40mm \/ 10 Metre","offer_id":52331118231826,"sku":"GYWXWGLBZSJ000213x10","price":35.05,"currency_code":"USD","in_stock":true},{"title":"Red \/ φ40mm \/ 10 Metre","offer_id":52331118264594,"sku":"GYWXWGLBZSJ000214x10","price":35.05,"currency_code":"USD","in_stock":true},{"title":"Green \/ φ40mm \/ 10 Metre","offer_id":52331118297362,"sku":"GYWXWGLBZSJ000215x10","price":35.05,"currency_code":"USD","in_stock":true},{"title":"Yellow \/ φ40mm \/ 10 Metre","offer_id":52331118330130,"sku":"GYWXWGLBZSJ000216x10","price":35.05,"currency_code":"USD","in_stock":true},{"title":"Blue \/ φ40mm \/ 10 Metre","offer_id":52331118362898,"sku":"GYWXWGLBZSJ000217x10","price":35.05,"currency_code":"USD","in_stock":true},{"title":"Transparent \/ φ40mm \/ 10 Metre","offer_id":52331118395666,"sku":"GYWXWGLBZSJ000218x10","price":35.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/1_00828f91-d3ed-4c20-804d-4fe00cb1b9e2.jpg?v=1781019464","url":"https:\/\/homediyer.com\/de\/products\/40mm-heat-shrink-tubing-2-1-ratio-wire-sleeve-electrical-cable-wrap","provider":"HomeDIYer","version":"1.0","type":"link"}