{"product_id":"45mm-heat-shrink-tubing-2-1-wire-wrap-sleeve","title":"45mm Heat Shrink Tubing 2:1 Ratio – Electrical Wire Wrap Sleeve, 7 Colors","description":"\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What length of heat shrink tubing do I need?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Measure the total length of wire or cable you need to cover, then add 10–15% extra for overlap and trimming. For a single automotive harness run, 1–2 metres is typically sufficient. For larger wiring projects or workshop stock, 5 or 10 metre rolls offer better value.\"\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 ratio means the tubing shrinks to approximately half its original inner diameter when heat is applied. This 45mm tubing will generally shrink down to around 22–23mm, providing a snug, secure fit over the covered component.\"\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. This tubing is generally suitable for automotive wiring harnesses, engine bay cable management, and outdoor electrical connections. It provides insulation and moisture resistance in most standard environments. For prolonged submersion or extreme chemical exposure, confirm suitability with us before ordering.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is this tubing flame-retardant?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Heat shrink tubing of this type is typically manufactured with flame-retardant polyolefin material, which self-extinguishes when the heat source is removed. Contact us to confirm the specific flame-retardant rating for your application.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What tool do I use to shrink this tubing?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"A heat gun is the recommended tool for even, controlled shrinking. In a pinch, a lighter or match can work for small sections, but a heat gun gives more consistent results and reduces the risk of scorching. Avoid direct flame contact with the tubing surface.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What wire or cable diameter fits inside 45mm heat shrink tubing?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The inner diameter before shrinking is 45mm (≈1.77\\\"\\). This makes it suitable for covering large cable bundles, conduit ends, battery terminals, or thick wiring harnesses. After shrinking, the recovered diameter is typically around 22–23mm. Always measure your cable bundle diameter before selecting a size.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Which color should I choose?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Color choice is typically based on wiring convention or personal preference. Black is the most common for general electrical use. Red is often used for positive leads, while other colors help with color-coded cable identification in complex wiring systems. Transparent tubing lets you see the wire or label underneath.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003e45mm Heat Shrink Tubing — Reliable Insulation for Large Cable Bundles \u0026amp; Automotive Wiring\u003c\/h2\u003e\n    \u003cp\u003eDealing with exposed wire ends, fraying cable bundles, or unprotected harness connections? Whether you're rewiring a vehicle, tidying up a workshop panel, or protecting outdoor electrical runs, finding heat shrink tubing that actually fits large-diameter cables without splitting or sliding off is a real challenge. This 45mm heat shrink tubing is built for exactly those jobs — giving electricians, automotive technicians, and serious DIYers a dependable sleeve that goes on easily and locks down tight.\u003c\/p\u003e\n    \u003cp\u003eEach order includes a continuous length of 2:1 ratio heat shrink tubing with a 45mm (≈1.77\") inner diameter before shrinking, recovering to approximately 22–23mm after heat is applied. Available in seven colors — Black, White, Red, Green, Yellow, Blue, and Transparent — and in cut lengths of 1 metre (≈3.3 ft), 2 metres (≈6.6 ft), 5 metres (≈16.4 ft), and 10 metres (≈32.8 ft). Made from flexible polyolefin material with flame-retardant properties.\u003c\/p\u003e\n    \u003cp\u003eTypical applications include automotive wiring harness protection, battery terminal insulation, large conduit end-capping, marine cable management, and color-coded wire identification in control panels. The transparent variant is especially useful when you need to keep labels or wire markings visible after installation.\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 has a pre-shrink inner diameter of 45mm (≈1.77\"). It is designed for cable bundles, conduit ends, and large connectors up to approximately 44mm in diameter. For smaller wire gauges, see our other heat shrink tubing sizes.\n  \u003c\/div\u003e\n\n  \u003ch2\u003e✅ Key Features of These 45mm 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, creating a firm, gap-free seal around large cable bundles and automotive wiring harnesses.\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 color-coded wire identification and meet common electrical wiring conventions.\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 1m, 2m, 5m, or 10m to match your project scope, from single-run repairs to bulk workshop stock for electrical cable wrap jobs.\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\u003c\/strong\u003e — Typically self-extinguishes when the heat source is removed, making it suitable for automotive engine bays and enclosed electrical enclosures.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e💧\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eMoisture \u0026amp; Abrasion Resistance\u003c\/strong\u003e — Provides a protective barrier against moisture ingress, dust, and mechanical abrasion — ideal for outdoor electrical connections and underhood wiring.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚡\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eFlexible After Shrinking\u003c\/strong\u003e — Remains pliable once cooled, so it won't crack or stiffen in cold environments, keeping your wire wrap sleeve intact over time.\u003c\/span\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003e📐 Technical Specifications — 45mm Heat Shrink Tubing\u003c\/h2\u003e\n  \u003cdiv class=\"hdiy-table-wrap\"\u003e\n    \u003ctable\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003cth\u003eInner Diameter (Before Shrink)\u003c\/th\u003e\n\u003ctd\u003e45mm (≈1.77\")\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eRecovered Diameter (After Shrink)\u003c\/th\u003e\n\u003ctd\u003eTypically ≈22–23mm (≈0.87–0.91\")\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 (flame-retardant)\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\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\u003eShrink Temperature\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\u003eApplicable Standards\u003c\/th\u003e\n\u003ctd\u003eContact us to confirm\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\u003eSpec Confirmation:\u003c\/strong\u003e Operating temperature, voltage rating, and wall thickness vary by production batch. If your application has strict electrical or thermal requirements, please contact us before ordering to confirm the exact specification.\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-faq\"\u003e\n    \u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\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 total length of wire or cable you need to cover, then add 10–15% extra for overlap and trimming. For a single automotive harness run, 1–2 metres is typically sufficient. For larger wiring projects or workshop stock, the 5 or 10 metre options offer better value per metre. As a reference: 1 metre ≈ 3.3 ft, 5 metres ≈ 16.4 ft, 10 metres ≈ 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 ratio means the tubing shrinks to approximately half its original inner diameter when heat is applied. This 45mm tubing will generally recover to around 22–23mm, providing a snug, secure fit over the covered component. Always verify your cable bundle's outer diameter is under 44mm before ordering.\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. This tubing is generally suitable for automotive wiring harnesses, engine bay cable management, and outdoor electrical connections. It provides insulation and moisture resistance in most standard environments. For prolonged submersion or extreme chemical exposure, contact us to confirm suitability before ordering.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eIs this tubing flame-retardant?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eHeat shrink tubing of this type is typically manufactured with flame-retardant polyolefin material, which self-extinguishes when the heat source is removed. Contact us to confirm the specific flame-retardant rating if your application requires compliance with a particular standard (e.g., UL, RoHS).\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat tool do 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 for even, controlled shrinking. Set it to a medium heat setting and move it steadily along the tubing to avoid hot spots. In a pinch, a lighter can work for small sections, but a heat gun gives more consistent results. Avoid direct flame contact with the tubing surface to prevent scorching.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat wire or cable diameter fits inside 45mm heat shrink tubing?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eThe inner diameter before shrinking is 45mm (≈1.77\"). This makes it suitable for covering large cable bundles, conduit ends, battery terminals, or thick wiring harnesses. After shrinking, the recovered diameter is typically around 22–23mm (≈0.87–0.91\"). Always measure your cable bundle's outer diameter before selecting a size — the bundle should be smaller than 45mm to slide the tubing on easily.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhich color should I choose for electrical wiring?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eColor choice is typically based on wiring convention or personal preference. Black is the most common for general electrical use. Red is often used for positive leads, while other colors help with color-coded cable identification in complex wiring systems. Transparent tubing lets you see the wire or label underneath — useful for inspection or when wire markings need to remain visible after installation.\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 \/ φ45mm \/ 1 Metre","offer_id":52330356343058,"sku":"GYWXWGLBZSJ000219x1","price":4.47,"currency_code":"USD","in_stock":true},{"title":"White \/ φ45mm \/ 1 Metre","offer_id":52330356375826,"sku":"GYWXWGLBZSJ000220x1","price":4.75,"currency_code":"USD","in_stock":true},{"title":"Red \/ φ45mm \/ 1 Metre","offer_id":52330356408594,"sku":"GYWXWGLBZSJ000221x1","price":4.75,"currency_code":"USD","in_stock":true},{"title":"Green \/ φ45mm \/ 1 Metre","offer_id":52330356441362,"sku":"GYWXWGLBZSJ000222x1","price":4.75,"currency_code":"USD","in_stock":true},{"title":"Yellow \/ φ45mm \/ 1 Metre","offer_id":52330356474130,"sku":"GYWXWGLBZSJ000223x1","price":4.75,"currency_code":"USD","in_stock":true},{"title":"Blue \/ φ45mm \/ 1 Metre","offer_id":52330356506898,"sku":"GYWXWGLBZSJ000224x1","price":4.75,"currency_code":"USD","in_stock":true},{"title":"Transparent \/ φ45mm \/ 1 Metre","offer_id":52330356539666,"sku":"GYWXWGLBZSJ000225x1","price":4.75,"currency_code":"USD","in_stock":true},{"title":"Black \/ φ45mm \/ 2 Metre","offer_id":52330356572434,"sku":"GYWXWGLBZSJ000219x2","price":8.4,"currency_code":"USD","in_stock":true},{"title":"White \/ φ45mm \/ 2 Metre","offer_id":52330356605202,"sku":"GYWXWGLBZSJ000220x2","price":8.74,"currency_code":"USD","in_stock":true},{"title":"Red \/ φ45mm \/ 2 Metre","offer_id":52330356637970,"sku":"GYWXWGLBZSJ000221x2","price":8.74,"currency_code":"USD","in_stock":true},{"title":"Green \/ φ45mm \/ 2 Metre","offer_id":52330356670738,"sku":"GYWXWGLBZSJ000222x2","price":8.74,"currency_code":"USD","in_stock":true},{"title":"Yellow \/ φ45mm \/ 2 Metre","offer_id":52330356703506,"sku":"GYWXWGLBZSJ000223x2","price":8.74,"currency_code":"USD","in_stock":true},{"title":"Blue \/ φ45mm \/ 2 Metre","offer_id":52330356736274,"sku":"GYWXWGLBZSJ000224x2","price":8.74,"currency_code":"USD","in_stock":true},{"title":"Transparent \/ φ45mm \/ 2 Metre","offer_id":52330356769042,"sku":"GYWXWGLBZSJ000225x2","price":8.74,"currency_code":"USD","in_stock":true},{"title":"Black \/ φ45mm \/ 5 Metre","offer_id":52330356801810,"sku":"GYWXWGLBZSJ000219x5","price":19.91,"currency_code":"USD","in_stock":true},{"title":"White \/ φ45mm \/ 5 Metre","offer_id":52330356834578,"sku":"GYWXWGLBZSJ000220x5","price":20.78,"currency_code":"USD","in_stock":true},{"title":"Red \/ φ45mm \/ 5 Metre","offer_id":52330356867346,"sku":"GYWXWGLBZSJ000221x5","price":20.78,"currency_code":"USD","in_stock":true},{"title":"Green \/ φ45mm \/ 5 Metre","offer_id":52330356900114,"sku":"GYWXWGLBZSJ000222x5","price":20.78,"currency_code":"USD","in_stock":true},{"title":"Yellow \/ φ45mm \/ 5 Metre","offer_id":52330356932882,"sku":"GYWXWGLBZSJ000223x5","price":20.78,"currency_code":"USD","in_stock":true},{"title":"Blue \/ φ45mm \/ 5 Metre","offer_id":52330356965650,"sku":"GYWXWGLBZSJ000224x5","price":20.78,"currency_code":"USD","in_stock":true},{"title":"Transparent \/ φ45mm \/ 5 Metre","offer_id":52330356998418,"sku":"GYWXWGLBZSJ000225x5","price":20.78,"currency_code":"USD","in_stock":true},{"title":"Black \/ φ45mm \/ 10 Metre","offer_id":52330357031186,"sku":"GYWXWGLBZSJ000219x10","price":39.09,"currency_code":"USD","in_stock":true},{"title":"White \/ φ45mm \/ 10 Metre","offer_id":52330357063954,"sku":"GYWXWGLBZSJ000220x10","price":40.81,"currency_code":"USD","in_stock":true},{"title":"Red \/ φ45mm \/ 10 Metre","offer_id":52330357096722,"sku":"GYWXWGLBZSJ000221x10","price":40.81,"currency_code":"USD","in_stock":true},{"title":"Green \/ φ45mm \/ 10 Metre","offer_id":52330357129490,"sku":"GYWXWGLBZSJ000222x10","price":40.81,"currency_code":"USD","in_stock":true},{"title":"Yellow \/ φ45mm \/ 10 Metre","offer_id":52330357162258,"sku":"GYWXWGLBZSJ000223x10","price":40.81,"currency_code":"USD","in_stock":true},{"title":"Blue \/ φ45mm \/ 10 Metre","offer_id":52330357195026,"sku":"GYWXWGLBZSJ000224x10","price":40.81,"currency_code":"USD","in_stock":true},{"title":"Transparent \/ φ45mm \/ 10 Metre","offer_id":52330357227794,"sku":"GYWXWGLBZSJ000225x10","price":40.81,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture_3_of_12_27757d1e-b5b8-4f76-917d-3b45a56741f4.jpg?v=1780890186","url":"https:\/\/homediyer.com\/products\/45mm-heat-shrink-tubing-2-1-wire-wrap-sleeve","provider":"HomeDIYer","version":"1.0","type":"link"}