{"product_id":"30mm-heat-shrink-tubing-2-1-ratio-wire-sleeve","title":"30mm Heat Shrink Tubing 2:1 Ratio – Flexible Wire Sleeve for Automotive \u0026 Electrical Use","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 the cable run or splice you need to cover, then add at least 10–15% extra for overlap and trimming. For a single wire splice, 1 metre is generally sufficient. For wiring harnesses or longer runs, 5 or 10 metre rolls are more economical. As a rule of thumb, cut pieces about 20% longer than the area you need to cover before shrinking.\"\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 will shrink to approximately half its original inner diameter when heat is applied. This 30mm tubing will typically shrink down to around 15mm, providing a snug, secure fit over cables, connectors, and splices in that size range.\"\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 rated for outdoor and automotive use. It typically provides resistance to UV exposure, moisture, and common automotive fluids. For harsh or submerged environments, we recommend confirming the specific rating with us before purchase.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the voltage and temperature rating of this tubing?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Polyolefin 2:1 heat shrink tubing of this type is generally rated for up to 600V and an operating temperature range of approximately -55°C to +125°C (-67°F to +257°F). Contact us to confirm the exact specifications 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 the most consistent results and reduces the risk of scorching. Avoid direct flame contact with the tubing surface.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is this tubing compatible with standard wire gauges and connectors?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"With a 30mm inner diameter before shrinking, this tubing is well-suited for larger cable bundles, thick automotive wiring, battery cables, and connectors in the 15–28mm diameter range. It is compatible with standard metric and AWG wire bundles in that size range. See variant options for exact sizing.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I use this for color-coding wires in my project?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Absolutely. This tubing is available in 7 colors — Black, White, Red, Green, Yellow, Blue, and Transparent — making it ideal for color-coding wiring harnesses, circuit boards, and DIY electrical projects for quick visual identification.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003e30mm Heat Shrink Tubing 2:1 — Reliable Insulation for Automotive Wiring \u0026amp; DIY Electrical Projects\u003c\/h2\u003e\n    \u003cp\u003eDealing with exposed wire splices, fraying cable ends, or a tangled wiring harness that needs clean, professional insulation? Whether you're a home DIYer tackling an automotive repair or an electrician managing a complex cable run, finding heat shrink tubing that fits large-diameter wires without splitting or sliding off is a constant frustration. Loose insulation leads to shorts, corrosion, and safety hazards — especially in vehicles and outdoor installations.\u003c\/p\u003e\n    \u003cp\u003eThis 30mm heat shrink tubing features a 2:1 shrink ratio, meaning it shrinks from a 30mm (≈1.18\") inner diameter down to approximately 15mm (≈0.59\") when heat is applied. Each listing covers a single continuous length — available in 1 metre (≈3.3 ft), 2 metres (≈6.6 ft), 5 metres (≈16.4 ft), and 10 metres (≈32.8 ft) — so you can buy exactly what your project requires. Made from flexible polyolefin material, it delivers consistent wall coverage and a firm, moisture-resistant seal after shrinking. Choose from 7 colors: Black, White, Red, Green, Yellow, Blue, and Transparent.\u003c\/p\u003e\n    \u003cp\u003eThis tubing is a go-to solution for automotive wiring harness repair, battery cable insulation, marine electrical connections, and color-coded wire management in control panels. Its flexibility and color variety make it equally useful for heat shrink tubing for car wiring, DIY home electrical projects, and workshop cable organization.\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:\u003c\/strong\u003e Fits cable bundles and connectors typically in the 15–28mm diameter range. Verify your cable outer diameter before ordering. Inner diameter before shrinking: φ30mm. Shrinks to approximately φ15mm.\n  \u003c\/div\u003e\n\n  \u003ch2\u003e✅ Key Features of These 30mm 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 30mm (≈1.18\") to approximately 15mm (≈0.59\"), creating a tight, conforming seal around cables, splices, and connectors without gaps or lifting edges.\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 — Available in Black, White, Red, Green, Yellow, Blue, and Transparent for easy color-coding of wiring harnesses, circuit panels, and DIY electrical projects.\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 — Polyolefin construction generally provides resistance to moisture ingress, mild chemicals, and physical abrasion — suitable for automotive underhood and outdoor cable protection applications.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚡\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eElectrical Insulation\u003c\/strong\u003e — Designed to provide reliable dielectric insulation for wire splices, terminal connections, and exposed conductors in low-to-medium voltage electrical systems.\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 — Supplied in continuous rolls of 1m, 2m, 5m, or 10m so you can cut exactly the piece size you need, minimizing waste on large wiring harness repair jobs.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🚗\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eAutomotive \u0026amp; DIY Ready\u003c\/strong\u003e — Sized for larger cable bundles common in automotive battery cables, marine wiring, and workshop power tool cord repair — where standard small-diameter heat shrink tubing simply won't fit.\u003c\/span\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003e📐 Technical Specifications — 30mm 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\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eInner Diameter (Before Shrink)\u003c\/th\u003e\n\u003ctd\u003eφ30mm (≈1.18\")\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eInner Diameter (After Shrink)\u003c\/th\u003e\n\u003ctd\u003eApproximately φ15mm (≈0.59\")\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\u003eVoltage Rating\u003c\/th\u003e\n\u003ctd\u003eTypically up to 600V — Contact us to confirm\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eOperating Temperature\u003c\/th\u003e\n\u003ctd\u003eTypically -55°C to +125°C (-67°F to +257°F) — Contact us to confirm\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eShrink Temperature\u003c\/th\u003e\n\u003ctd\u003eTypically activates at approximately 90°C (194°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\u003eApplication Method\u003c\/th\u003e\n\u003ctd\u003eHeat gun recommended; lighter suitable for small sections\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eSuitable For\u003c\/th\u003e\n\u003ctd\u003eAutomotive wiring, battery cables, marine electrical, DIY electrical projects\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 Note:\u003c\/strong\u003e Always measure your cable or connector outer diameter before selecting a size. The tubing must slide over the cable before shrinking. If your cable OD is close to 30mm, consider the next size up for easier installation.\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\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 the cable run or splice you need to cover, then add at least 10–15% extra for overlap and trimming. For a single wire splice, 1 metre is generally sufficient. For wiring harnesses or longer runs, 5 or 10 metre rolls are more economical. As a rule of thumb, cut pieces about 20% longer than the area you need to cover before shrinking.\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 will shrink to approximately half its original inner diameter when heat is applied. This 30mm tubing will typically shrink down to around 15mm (≈0.59\"), providing a snug, secure fit over cables, connectors, and splices in that size range.\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 rated for outdoor and automotive use. It typically provides resistance to UV exposure, moisture, and common automotive fluids. For harsh or submerged environments, we recommend confirming the specific rating with us before purchase.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat is the voltage and temperature rating of this tubing?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003ePolyolefin 2:1 heat shrink tubing of this type is generally rated for up to 600V and an operating temperature range of approximately -55°C to +125°C (-67°F to +257°F). Contact us to confirm the exact specifications for your application.\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. In a pinch, a lighter or match can work for small sections, but a heat gun gives the most consistent results and reduces the risk of scorching. Avoid direct flame contact with the tubing surface.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eIs this tubing compatible with standard wire gauges and connectors?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eWith a 30mm inner diameter before shrinking, this tubing is well-suited for larger cable bundles, thick automotive wiring, battery cables, and connectors in the 15–28mm diameter range. It is compatible with standard metric and AWG wire bundles in that size range. See variant options for exact sizing.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan I use this for color-coding wires in my project?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eAbsolutely. This tubing is available in 7 colors — Black, White, Red, Green, Yellow, Blue, and Transparent — making it ideal for color-coding wiring harnesses, circuit boards, and DIY electrical projects for quick visual identification.\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 \/ φ30mm \/ 1 Metre","offer_id":52331116593426,"sku":"GYWXWGLBZSJ000198x1","price":2.16,"currency_code":"USD","in_stock":true},{"title":"White \/ φ30mm \/ 1 Metre","offer_id":52331116626194,"sku":"GYWXWGLBZSJ000199x1","price":2.33,"currency_code":"USD","in_stock":true},{"title":"Red \/ φ30mm \/ 1 Metre","offer_id":52331116658962,"sku":"GYWXWGLBZSJ000200x1","price":2.33,"currency_code":"USD","in_stock":true},{"title":"Green \/ φ30mm \/ 1 Metre","offer_id":52331116691730,"sku":"GYWXWGLBZSJ000201x1","price":2.33,"currency_code":"USD","in_stock":true},{"title":"Yellow \/ φ30mm \/ 1 Metre","offer_id":52331116724498,"sku":"GYWXWGLBZSJ000202x1","price":2.33,"currency_code":"USD","in_stock":true},{"title":"Blue \/ φ30mm \/ 1 Metre","offer_id":52331116757266,"sku":"GYWXWGLBZSJ000203x1","price":2.33,"currency_code":"USD","in_stock":true},{"title":"Transparent \/ φ30mm \/ 1 Metre","offer_id":52331116790034,"sku":"GYWXWGLBZSJ000204x1","price":2.33,"currency_code":"USD","in_stock":true},{"title":"Black \/ φ30mm \/ 2 Metre","offer_id":52331116822802,"sku":"GYWXWGLBZSJ000198x2","price":3.33,"currency_code":"USD","in_stock":true},{"title":"White \/ φ30mm \/ 2 Metre","offer_id":52331116855570,"sku":"GYWXWGLBZSJ000199x2","price":3.62,"currency_code":"USD","in_stock":true},{"title":"Red \/ φ30mm \/ 2 Metre","offer_id":52331116888338,"sku":"GYWXWGLBZSJ000200x2","price":3.62,"currency_code":"USD","in_stock":true},{"title":"Green \/ φ30mm \/ 2 Metre","offer_id":52331116921106,"sku":"GYWXWGLBZSJ000201x2","price":3.62,"currency_code":"USD","in_stock":true},{"title":"Yellow \/ φ30mm \/ 2 Metre","offer_id":52331116953874,"sku":"GYWXWGLBZSJ000202x2","price":3.62,"currency_code":"USD","in_stock":true},{"title":"Blue \/ φ30mm \/ 2 Metre","offer_id":52331116986642,"sku":"GYWXWGLBZSJ000203x2","price":3.62,"currency_code":"USD","in_stock":true},{"title":"Transparent \/ φ30mm \/ 2 Metre","offer_id":52331117019410,"sku":"GYWXWGLBZSJ000204x2","price":3.62,"currency_code":"USD","in_stock":true},{"title":"Black \/ φ30mm \/ 5 Metre","offer_id":52331117052178,"sku":"GYWXWGLBZSJ000198x5","price":7.22,"currency_code":"USD","in_stock":true},{"title":"White \/ φ30mm \/ 5 Metre","offer_id":52331117084946,"sku":"GYWXWGLBZSJ000199x5","price":7.94,"currency_code":"USD","in_stock":true},{"title":"Red \/ φ30mm \/ 5 Metre","offer_id":52331117117714,"sku":"GYWXWGLBZSJ000200x5","price":7.94,"currency_code":"USD","in_stock":true},{"title":"Green \/ φ30mm \/ 5 Metre","offer_id":52331117150482,"sku":"GYWXWGLBZSJ000201x5","price":7.94,"currency_code":"USD","in_stock":true},{"title":"Yellow \/ φ30mm \/ 5 Metre","offer_id":52331117183250,"sku":"GYWXWGLBZSJ000202x5","price":7.94,"currency_code":"USD","in_stock":true},{"title":"Blue \/ φ30mm \/ 5 Metre","offer_id":52331117216018,"sku":"GYWXWGLBZSJ000203x5","price":7.94,"currency_code":"USD","in_stock":true},{"title":"Transparent \/ φ30mm \/ 5 Metre","offer_id":52331117248786,"sku":"GYWXWGLBZSJ000204x5","price":7.94,"currency_code":"USD","in_stock":true},{"title":"Black \/ φ30mm \/ 10 Metre","offer_id":52331117281554,"sku":"GYWXWGLBZSJ000198x10","price":13.71,"currency_code":"USD","in_stock":true},{"title":"White \/ φ30mm \/ 10 Metre","offer_id":52331117314322,"sku":"GYWXWGLBZSJ000199x10","price":15.15,"currency_code":"USD","in_stock":true},{"title":"Red \/ φ30mm \/ 10 Metre","offer_id":52331117347090,"sku":"GYWXWGLBZSJ000200x10","price":15.15,"currency_code":"USD","in_stock":true},{"title":"Green \/ φ30mm \/ 10 Metre","offer_id":52331117379858,"sku":"GYWXWGLBZSJ000201x10","price":15.15,"currency_code":"USD","in_stock":true},{"title":"Yellow \/ φ30mm \/ 10 Metre","offer_id":52331117412626,"sku":"GYWXWGLBZSJ000202x10","price":15.15,"currency_code":"USD","in_stock":true},{"title":"Blue \/ φ30mm \/ 10 Metre","offer_id":52331117445394,"sku":"GYWXWGLBZSJ000203x10","price":15.15,"currency_code":"USD","in_stock":true},{"title":"Transparent \/ φ30mm \/ 10 Metre","offer_id":52331117478162,"sku":"GYWXWGLBZSJ000204x10","price":15.15,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture_2_of_12_c608772d-88cf-43ba-8f5c-580a76a33234.jpg?v=1781016311","url":"https:\/\/homediyer.com\/de\/products\/30mm-heat-shrink-tubing-2-1-ratio-wire-sleeve","provider":"HomeDIYer","version":"1.0","type":"link"}