{"product_id":"90mm-black-heat-shrink-tubing-2-1-electrical-wire-sleeve","title":"90mm Black Heat Shrink Tubing 2:1 Shrink Ratio – Electrical Wire Sleeve","description":"\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"How do I choose the right length of heat shrink tubing?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Measure the total length of the wire or cable section you need to cover, then add at least 10–15% extra to account for overlap at each end. For longer cable runs or harness builds, the 2-meter or 3-meter option is generally more economical.\"}},{\"@type\":\"Question\",\"name\":\"What does the 2:1 shrink ratio mean?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"A 2:1 ratio means the tubing will shrink to approximately half its original diameter when heat is applied. This 90mm tubing will typically shrink down to around 45mm, providing a snug fit over large cables, conduit bundles, or connectors.\"}},{\"@type\":\"Question\",\"name\":\"How strong is the insulation provided by this tubing?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Heat shrink tubing of this type generally provides solid electrical insulation suitable for low- to medium-voltage applications. For exact dielectric strength ratings, please contact us to confirm specifications for your use case.\"}},{\"@type\":\"Question\",\"name\":\"Can this heat shrink tubing be used outdoors?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Standard polyolefin heat shrink tubing offers basic moisture resistance and is suitable for many indoor and sheltered outdoor applications. For prolonged UV or harsh weather exposure, an adhesive-lined or UV-stabilized variant is generally recommended.\"}},{\"@type\":\"Question\",\"name\":\"Is this tubing compatible with standard wire and cable sizes?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The 90mm pre-shrink diameter is designed for large-diameter cables, conduit bundles, or grouped wire harnesses. It is compatible with any round cable or bundle that fits within the 90mm opening before shrinking.\"}},{\"@type\":\"Question\",\"name\":\"What tool do I use to shrink this tubing?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"A heat gun is the recommended tool for even, controlled shrinking. In a pinch, a lighter or torch can be used carefully, but a heat gun provides more uniform results and reduces the risk of scorching the tubing or underlying wires.\"}},{\"@type\":\"Question\",\"name\":\"Can I cut this tubing to a custom length?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. The tubing can be cut to any length with standard scissors or a utility knife before application. Cut ends remain clean and do not fray, making it easy to customize for your specific project.\"}},{\"@type\":\"Question\",\"name\":\"What is the minimum shrink temperature for this tubing?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Polyolefin heat shrink tubing of this type typically begins to shrink at around 90°C (194°F) and reaches full shrink at approximately 120°C (248°F). Exact activation temperature may vary — contact us to confirm for your application.\"}}]}\u003c\/script\u003e\n\n\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003e90mm Black Heat Shrink Tubing — Reliable Insulation for Large Cable Runs\u003c\/h2\u003e\n    \u003cp\u003eElectricians, auto technicians, and DIY enthusiasts working with large-gauge wiring know the frustration of exposed splices, frayed insulation, and connectors that won't stay protected. Whether you're building a wiring harness, repairing marine cables, or bundling conduit runs, having the right large-diameter heat shrink tubing on hand makes the difference between a clean, lasting repair and one that fails under stress.\u003c\/p\u003e\n    \u003cp\u003eThis 90mm black heat shrink tubing features a 2:1 shrink ratio, meaning it shrinks to approximately 45mm (≈1.77\") when heat is applied. Each piece is sold by the meter — choose from 1 meter (≈39.4\"), 2 meters (≈78.7\"), or 3 meters (≈118.1\") to match your project scope. Made from flexible polyolefin material, it delivers consistent wall coverage and a firm grip around cables, connectors, and bundled wire groups.\u003c\/p\u003e\n    \u003cp\u003eIdeal for automotive wiring harness protection, marine cable insulation, industrial conduit bundling, and electrical panel wire management — this large-diameter heat shrink sleeve keeps connections secure and insulated in demanding environments.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-compat\"\u003e\n    \u003cspan class=\"hdiy-compat-icon\"\u003e🔌\u003c\/span\u003e\n    \u003cstrong\u003eCompatibility:\u003c\/strong\u003e Fits cables and bundles up to 90mm (≈3.54\") in diameter before shrinking. Shrinks to approximately 45mm (≈1.77\"). Compatible with standard heat guns operating at 90°C–120°C (194°F–248°F). Verify your cable OD before ordering.\n  \u003c\/div\u003e\n\n  \u003ch2\u003e✅ Key Features of These 90mm 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 90mm down to approximately 45mm, creating a firm, uniform grip around large cables, conduit bundles, and grouped wire harnesses.\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 — Polyolefin construction provides reliable dielectric insulation for wire splices, terminals, and connectors in low- to medium-voltage electrical applications.\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 — The shrunk sleeve forms a protective barrier against moisture ingress, dust, and mechanical abrasion — extending the service life of your cable runs.\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 — Available in 1, 2, and 3 meter lengths; cuts cleanly with scissors or a utility knife so you get exactly the coverage you need without waste.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🖤\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eBlack Finish for Clean Routing\u003c\/strong\u003e — The matte black color blends naturally into automotive, industrial, and electrical panel environments, giving cable runs a tidy, professional appearance.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🌡️\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eHeat Gun Compatible\u003c\/strong\u003e — Designed for use with standard heat guns; shrinks evenly without scorching, making it suitable for both workshop and field repair applications.\u003c\/span\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003e📐 Technical Specifications — 90mm 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 Sleeve\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003ePre-Shrink Diameter\u003c\/th\u003e\n\u003ctd\u003e90mm (≈3.54\")\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003ePost-Shrink Diameter\u003c\/th\u003e\n\u003ctd\u003eApproximately 45mm (≈1.77\")\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\u003eColor\u003c\/th\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eAvailable Lengths\u003c\/th\u003e\n\u003ctd\u003e1 Meter (≈39.4\"), 2 Meter (≈78.7\"), 3 Meter (≈118.1\")\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003ePolyolefin (typically)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eActivation Temperature\u003c\/th\u003e\n\u003ctd\u003eTypically 90°C–120°C (194°F–248°F)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eWall Thickness (post-shrink)\u003c\/th\u003e\n\u003ctd\u003eSee variant options\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\u003eOperating Temperature Range\u003c\/th\u003e\n\u003ctd\u003eContact us to confirm\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eApplication Method\u003c\/th\u003e\n\u003ctd\u003eHeat gun recommended\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eCompliance \/ 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\u003eHeads up:\u003c\/strong\u003e If your application requires specific voltage ratings, wall thickness, or compliance certifications (UL, RoHS, etc.), please contact us before ordering so we can confirm the exact specification for your needs.\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 length of the wire or cable section you need to cover, then add at least 10–15% extra to account for overlap at each end. For longer cable runs or harness builds, the 2-meter or 3-meter option is generally more economical than cutting multiple short pieces.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat does the 2:1 shrink ratio mean?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eA 2:1 ratio means the tubing will shrink to approximately half its original diameter when heat is applied. This 90mm tubing will typically shrink down to around 45mm (≈1.77\"), providing a snug fit over large cables, conduit bundles, or grouped connectors.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eHow strong is the insulation provided by this tubing?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003ePolyolefin heat shrink tubing of this type generally provides solid electrical insulation suitable for low- to medium-voltage applications. For exact dielectric strength or voltage ratings required for your project, please contact us to confirm specifications 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 wet environments?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eStandard polyolefin heat shrink tubing offers basic moisture resistance and is suitable for many indoor and sheltered outdoor applications. For prolonged UV exposure or submersion, an adhesive-lined (dual-wall) or UV-stabilized variant is generally recommended for better long-term protection.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eIs this tubing compatible with my cable or wire bundle size?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eThe 90mm pre-shrink diameter is designed for large-diameter cables, conduit bundles, or grouped wire harnesses. In most cases, any round cable or bundle with an outer diameter up to 90mm will fit before shrinking. After shrinking, the tubing will conform tightly to bundles down to approximately 45mm in diameter.\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. Move the heat gun slowly along the length of the tubing for uniform results. In a pinch, a lighter or torch can be used carefully, but a heat gun provides more consistent shrinkage and reduces the risk of scorching the tubing or underlying wires.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan I cut this tubing to a custom length?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eYes. The tubing can be cut to any length with standard scissors or a utility knife before application. Cut ends remain clean and do not fray, making it straightforward to customize for your specific project without any special tools.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eIs this the right product for automotive wiring harness repair?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eThis 90mm heat shrink tubing is well-suited for protecting large automotive wiring harnesses, bundling multiple cables together, and insulating large-gauge wire splices. For smaller individual wires within a harness, you would typically use a smaller diameter tubing alongside this sleeve. If you're unsure which size fits your harness, contact us with your cable bundle OD and we'll help you select the right option.\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 \u003cstrong\u003ecolor and length\u003c\/strong\u003e above, then add to cart — ships from our US warehouse.\n  \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"HomeDIYer","offers":[{"title":"Black \/ 1 Meter","offer_id":52330951639314,"sku":"GLFBFHHGLBZSJ000254x1","price":37.77,"currency_code":"USD","in_stock":true},{"title":"Black \/ 2 Meter","offer_id":52330951672082,"sku":"GLFBFHHGLBZSJ000254x2","price":81.12,"currency_code":"USD","in_stock":true},{"title":"Black \/ 3 Meter","offer_id":52330951704850,"sku":"GLFBFHHGLBZSJ000254x3","price":120.55,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Main-02_8042396a-9aff-4111-a592-498849627b37.jpg?v=1781001457","url":"https:\/\/homediyer.com\/products\/90mm-black-heat-shrink-tubing-2-1-electrical-wire-sleeve","provider":"HomeDIYer","version":"1.0","type":"link"}