{"product_id":"18mm-heat-shrink-tubing-2-1-electrical-insulation-sleeving","title":"18mm Heat Shrink Tubing 2:1 — Electrical Insulation Sleeving, 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\": \"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 example, a 3-meter wire harness typically needs at least a 3 Meter roll, while larger wiring projects generally benefit from the 5 Meter or 10 Meter options to avoid mid-run splices.\"\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 approximately half its original diameter when heat is applied. This 18mm tubing will typically shrink down to around 9mm, creating a snug, insulating sleeve over your wire or cable.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What wire or cable sizes does 18mm heat shrink tubing fit?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"18mm (≈11\/16\\\" inner diameter before shrinking) generally fits cable bundles, conduit ends, and wire harnesses in the range of roughly 9mm–16mm outer diameter. Always measure your cable OD before ordering to confirm fit.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can this heat shrink tubing be used outdoors?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This tubing is generally suitable for protected outdoor use where it is shielded from prolonged UV exposure and standing water. For fully exposed marine or direct-burial applications, a dual-wall adhesive-lined heat shrink is typically recommended for added moisture resistance.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What temperature is needed to shrink this tubing?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Standard polyolefin heat shrink tubing like this typically activates at around 90°C (194°F) and fully shrinks at approximately 120°C (248°F). A heat gun is the recommended tool; an open flame can be used carefully but may cause uneven shrinkage or scorching.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is this tubing RoHS compliant and safe for electrical use?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This heat shrink tubing is made from polyolefin material, which is generally RoHS-compliant and flame-retardant. It is suitable for standard electrical insulation, wire bundling, and strain relief applications. Contact us to confirm compliance documentation for your specific project.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I use scissors or a knife to cut the tubing to length?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. Before shrinking, the tubing cuts cleanly with standard scissors or a utility knife. For the cleanest edge, cut perpendicular to the tube axis. After shrinking, the material becomes firmer and may require wire cutters or a sharp blade.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003e18mm Heat Shrink Tubing — Reliable Electrical Insulation for Wire Bundling \u0026amp; Cable Repair\u003c\/h2\u003e\n    \u003cp\u003eWhether you're rewiring a vehicle, tidying up a home electrical panel, or repairing frayed cables on a workbench, loose or exposed wires create real safety hazards. DIYers, auto electricians, marine technicians, and hobbyists all face the same challenge: finding 18mm heat shrink tubing that fits cleanly, shrinks evenly, and stays put once applied.\u003c\/p\u003e\n    \u003cp\u003eEach roll of this 18mm heat shrink tubing features a 2:1 shrink ratio — meaning the 18mm (≈11\/16\") pre-shrink inner diameter reduces to approximately 9mm (≈3\/8\") after heat is applied. Available in seven colors (Black, White, Red, Green, Yellow, Blue, and Transparent) and six lengths (1 Meter through 20 Meter \/ ≈3.3 ft to ≈65.6 ft), so you can match the right color-coding convention and buy exactly the quantity your project demands. Material is polyolefin, which is flame-retardant and flexible after shrinking.\u003c\/p\u003e\n    \u003cp\u003eTypical use cases include automotive wire harness insulation, electrical panel cable management, marine wiring protection, RC hobby builds, and DIY home repair projects where color-coded wire identification and neat cable bundling with heat shrink sleeving are essential.\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 cable bundles and wire harnesses with an outer diameter of approximately 9mm–16mm. Verify your cable OD before ordering. Works with standard heat guns, soldering station hot-air attachments, and carefully applied open flame.\n  \u003c\/div\u003e\n\n  \u003ch2\u003e✅ Key Features of These 18mm 2:1 Heat Shrink Tubes\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 18mm to approximately 9mm, creating a firm, form-fitting sleeve ideal for heat shrink wire insulation on medium-gauge cable bundles.\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 wiring identification in automotive, marine, and panel wiring applications.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eFlexible Length Selection\u003c\/strong\u003e — Choose from 1 Meter (≈3.3 ft) to 20 Meter (≈65.6 ft) rolls so you buy only what your project needs, reducing waste on small repairs or stocking up for large wiring 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 — Made from polyolefin material that is generally flame-retardant and maintains flexibility after shrinking, resisting cracking in vibration-prone environments like engine bays and vehicle interiors.\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 \u0026amp; Apply\u003c\/strong\u003e — Cuts cleanly with scissors before shrinking; slides over wire ends and connectors without fraying, making it practical for electrical cable sleeving on the job site or at the workbench.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚡\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eElectrical Insulation Performance\u003c\/strong\u003e — Provides a consistent dielectric barrier over splices, solder joints, and terminal connections, supporting standard low-voltage wire bundling and strain relief needs.\u003c\/span\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003e📐 Technical Specifications — 18mm 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 Sleeving\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eInner Diameter (Before Shrink)\u003c\/th\u003e\n\u003ctd\u003e18mm (≈11\/16\")\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eInner Diameter (After Shrink)\u003c\/th\u003e\n\u003ctd\u003eApproximately 9mm (≈3\/8\")\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 Rating\u003c\/th\u003e\n\u003ctd\u003eFlame-retardant (contact us to confirm specific standard)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eActivation Temperature\u003c\/th\u003e\n\u003ctd\u003eTypically ~90°C (194°F); full shrink at ~120°C (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\u003e1 Meter (≈3.3 ft), 3 Meter (≈9.8 ft), 5 Meter (≈16.4 ft), 10 Meter (≈32.8 ft), 15 Meter (≈49.2 ft), 20 Meter (≈65.6 ft)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eRecommended Cable OD Range\u003c\/th\u003e\n\u003ctd\u003eApproximately 9mm–16mm (See variant options)\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\u003eRoHS Compliance\u003c\/th\u003e\n\u003ctd\u003eContact us to confirm\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eShips From\u003c\/th\u003e\n\u003ctd\u003eUS Warehouse\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\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\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 example, a 3-meter wire harness typically needs at least a 3 Meter roll, while larger wiring projects generally benefit from the 5 Meter or 10 Meter options to avoid mid-run splices. If you're stocking a workshop, the 15 Meter or 20 Meter (≈65.6 ft) rolls offer the best value per foot.\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 approximately half its original inner diameter when heat is applied. This 18mm tubing will typically shrink down to around 9mm (≈3\/8\"), creating a snug, insulating sleeve over your wire or cable bundle. The wall thickness increases proportionally, improving mechanical protection at the joint.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat wire or cable sizes does 18mm heat shrink tubing fit?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003e18mm inner diameter (≈11\/16\" before shrinking) generally fits cable bundles, conduit ends, and wire harnesses in the range of roughly 9mm–16mm outer diameter. Always measure your cable OD before ordering to confirm fit. If your cable OD is close to 18mm, the tubing may not shrink tightly enough — consider a smaller size.\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?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eThis tubing is generally suitable for protected outdoor use where it is shielded from prolonged UV exposure and standing water. For fully exposed marine or direct-burial applications, a dual-wall adhesive-lined heat shrink is typically recommended for added moisture resistance and waterproofing. Contact us if you need guidance on the right product for your environment.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat temperature is needed to shrink this tubing?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eStandard polyolefin heat shrink tubing like this typically activates at around 90°C (194°F) and fully shrinks at approximately 120°C (248°F). A heat gun set to medium heat is the recommended tool for even, controlled shrinkage. An open flame (lighter or torch) can be used carefully but may cause uneven shrinkage or surface scorching if held too close.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eIs this tubing safe for electrical insulation and flame-retardant?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eThis heat shrink tubing is made from polyolefin material, which is generally flame-retardant and suitable for standard electrical insulation, wire bundling, and strain relief applications. It is commonly used in automotive, marine, and low-voltage electrical projects. Contact us to confirm compliance documentation (RoHS, UL, etc.) for your specific project requirements.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan I cut the tubing to a custom length?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eYes. Before shrinking, the tubing cuts cleanly with standard scissors or a utility knife. For the cleanest edge, cut perpendicular to the tube axis. After shrinking, the material becomes firmer — wire cutters or a sharp blade work best for trimming cured sections. Buying a longer roll (5 Meter or 10 Meter) gives you flexibility to cut custom lengths for multiple jobs.\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":52330942726418,"sku":"GLFBFHHGLBZSJ000163x1","price":6.94,"currency_code":"USD","in_stock":true},{"title":"White \/ 1 Meter","offer_id":52330942759186,"sku":"GLFBFHHGLBZSJ000164x1","price":7.3,"currency_code":"USD","in_stock":true},{"title":"Red \/ 1 Meter","offer_id":52330942791954,"sku":"GLFBFHHGLBZSJ000165x1","price":7.3,"currency_code":"USD","in_stock":true},{"title":"Green \/ 1 Meter","offer_id":52330942824722,"sku":"GLFBFHHGLBZSJ000166x1","price":7.3,"currency_code":"USD","in_stock":true},{"title":"Yellow \/ 1 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