{"product_id":"black-heat-shrink-tubing-10mm-80mm-2-1-ratio-electrical-wire-sleeving","title":"Black Heat Shrink Tubing 10mm–80mm | 2:1 Ratio Electrical Wire Sleeving","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 diameter of heat shrink tubing?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Generally, select a tubing diameter that is 20–30% larger than the outer diameter of the cable or connector you need to cover. For example, for a 8mm cable, a 10mm (3\/8\\u201d) tube is typically a good fit. After shrinking at a 2:1 ratio, the tubing will conform tightly around the substrate.\"\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. For example, a 20mm tube will shrink down to roughly 10mm, creating a snug, protective sleeve around your wire or cable.\"\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 outdoor use in dry to moderately humid environments. It provides resistance to moisture, UV exposure, and abrasion. For fully submerged or extreme outdoor applications, we recommend confirming suitability with our team.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What temperature is needed to shrink the tubing?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Heat shrink tubing of this type typically activates at around 70–90°C (158–194°F) and fully shrinks at approximately 120°C (248°F). A heat gun is the recommended tool. Avoid open flames as they can scorch or unevenly shrink the tubing.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is this tubing compatible with automotive wiring?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. This black heat shrink sleeving is commonly used in automotive wiring harnesses, car audio installations, and under-hood cable management. The black finish blends with most factory wiring and the tubing is generally resistant to engine-bay temperatures and minor fluid exposure.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How much tubing do I need — which roll length should I order?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"For small repair jobs or single-project use, a 25-metre roll is typically sufficient. For workshop stock or recurring electrical projects, the 50-metre or 100-metre rolls offer better value per metre. Larger diameter sizes (28mm–80mm) are available in 25-metre rolls.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the wall thickness after shrinking?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Wall thickness after shrinking varies by diameter but is generally in the range of 0.6mm–1.5mm for standard 2:1 polyolefin heat shrink tubing. Contact us to confirm the exact wall thickness for your selected size.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003eBlack Heat Shrink Tubing 10mm–80mm — Reliable Wire Protection for Electrical \u0026amp; Automotive Use\u003c\/h2\u003e\n    \u003cp\u003eWhether you're rewiring a vehicle, tidying up a workshop panel, or protecting exposed cable joints from moisture and abrasion, finding the right black heat shrink tubing in the exact diameter you need shouldn't be a hassle. Electricians, auto technicians, and serious DIYers all face the same problem: undersized rolls, limited diameter options, and tubing that splits or discolors under heat. This listing is built for those who need a dependable, bulk-ready solution across a wide range of cable sizes.\u003c\/p\u003e\n    \u003cp\u003eEach roll contains continuous black polyolefin heat shrink tubing with a 2:1 shrink ratio, available in diameters from 10mm (3\/8\") to 80mm (≈3.1\"). Roll lengths are offered in 25 metres (≈82 ft), 50 metres (≈164 ft), and 100 metres (≈328 ft) depending on the diameter selected. The tubing shrinks to approximately half its original inner diameter when heat is applied, forming a tight, uniform sleeve that conforms to irregular shapes and connector profiles.\u003c\/p\u003e\n    \u003cp\u003eTypical applications include automotive wiring harness protection and car audio cable management, electrical panel wire bundling and junction box strain relief, and marine or outdoor cable runs where moisture ingress and UV exposure are concerns. The black finish integrates cleanly with factory wiring and professional installations alike.\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 is designed for standard round cables and connectors. Verify your cable's outer diameter before selecting a size — the tubing inner diameter should be 20–30% larger than the cable OD for a proper fit after shrinking.\n  \u003c\/div\u003e\n\n  \u003ch2\u003e✅ Key Features of These Black Heat Shrink Tubing Rolls\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 snug, uniform sleeve around wires, cables, 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\u003eWide Diameter Range (10mm–80mm)\u003c\/strong\u003e — Covers everything from small signal wires to large battery cables and conduit ends, reducing the need to stock multiple product lines.\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 provides a protective barrier against water ingress, dust, and mechanical wear — suitable for automotive, marine, and outdoor electrical cable sleeving.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎨\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eClean Black Finish\u003c\/strong\u003e — Blends with factory wiring and professional installations; the matte black surface resists discoloration and maintains a tidy appearance after shrinking.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eBulk Roll Lengths\u003c\/strong\u003e — Available in 25m, 50m, and 100m rolls so you can stock the right quantity for single jobs or ongoing workshop use without frequent reordering.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚡\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eElectrically Insulating\u003c\/strong\u003e — Provides electrical insulation over splices, terminals, and exposed conductors, helping meet basic wire protection requirements in automotive and low-voltage electrical applications.\u003c\/span\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003e📐 Technical Specifications — Black Heat Shrink Tubing\u003c\/h2\u003e\n  \u003cdiv class=\"hdiy-table-wrap\"\u003e\n    \u003ctable\u003e\n      \u003ctbody\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\u003eColor\u003c\/th\u003e\n\u003ctd\u003eBlack\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\u003eAvailable Diameters\u003c\/th\u003e\n\u003ctd\u003e10mm (3\/8\"), 12mm (1\/2\"), 14mm (9\/16\"), 16mm (5\/8\"), 18mm (11\/16\"), 20mm (3\/4\"), 22mm (7\/8\"), 25mm (1\"), 28mm (1-1\/8\"), 30mm (1-3\/16\"), 35mm (1-3\/8\"), 40mm (1-9\/16\"), 45mm (1-3\/4\"), 50mm (2\"), 60mm (2-3\/8\"), 70mm (2-3\/4\"), 80mm (3-1\/8\")\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eRoll Lengths\u003c\/th\u003e\n\u003ctd\u003e25 Metres (≈82 ft), 50 Metres (≈164 ft), 100 Metres (≈328 ft)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eShrink Temperature\u003c\/th\u003e\n\u003ctd\u003eTypically 70–120°C (158–248°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 — Contact us to confirm\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eRecommended Application Tool\u003c\/th\u003e\n\u003ctd\u003eHeat gun (open flame not recommended)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eTypical Use\u003c\/th\u003e\n\u003ctd\u003eAutomotive wiring, electrical insulation, cable bundling, marine cable protection\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eCountry of Origin\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-faq\"\u003e\n    \u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eHow do I choose the right diameter of heat shrink tubing?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eGenerally, select a tubing diameter that is 20–30% larger than the outer diameter of the cable or connector you need to cover. For example, for an 8mm cable, a 10mm (3\/8\") tube is typically a good fit. After shrinking at a 2:1 ratio, the tubing will conform tightly around the substrate. When in doubt, size up — tubing that is slightly oversized before shrinking is easier to work with than tubing that is too tight to slide over the cable end.\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. For example, a 20mm (3\/4\") tube will shrink down to roughly 10mm (3\/8\"), creating a snug, protective sleeve around your wire or cable. The length of the tubing also shortens slightly during the process — typically by around 5–10% — so cut your pieces a little longer than the area you need to cover.\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 marine environments?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eThis tubing is generally suitable for outdoor use in dry to moderately humid environments. Polyolefin heat shrink provides resistance to moisture, UV exposure, and abrasion, making it a common choice for outdoor electrical cable sleeving and marine wiring runs. For fully submerged applications or extreme saltwater exposure, we recommend confirming suitability with our team before ordering.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat temperature is needed to shrink the tubing, and what tool should I use?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eHeat shrink tubing of this type typically begins to activate at around 70–90°C (158–194°F) and fully shrinks at approximately 120°C (248°F). A heat gun is the recommended tool — move it steadily along the tubing to ensure even shrinkage. Avoid using open flames such as lighters or torches, as they can scorch, bubble, or unevenly shrink the tubing, compromising the seal.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eIs this tubing compatible with automotive wiring and car audio installations?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eYes. This black heat shrink sleeving is commonly used in automotive wiring harnesses, car audio cable management, and under-hood electrical repairs. The black finish blends with most factory wiring, and the tubing is generally resistant to engine-bay temperatures and minor fluid exposure. For high-heat zones directly adjacent to exhaust components, a higher-rated tubing may be more appropriate — contact us to confirm.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eHow much tubing do I need — which roll length should I order?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eFor small repair jobs or single-project use, a 25-metre (≈82 ft) roll is typically sufficient. For workshop stock or recurring electrical projects, the 50-metre (≈164 ft) or 100-metre (≈328 ft) rolls offer better value per metre. Note that larger diameter sizes (28mm–80mm) are available in 25-metre rolls, while smaller diameters (10mm–25mm) are available in all three lengths.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat is the wall thickness of the tubing after shrinking?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eWall thickness after shrinking varies by diameter. For standard 2:1 polyolefin heat shrink tubing, the recovered wall thickness is generally in the range of 0.6mm–1.5mm depending on the size selected. Contact us to confirm the exact wall thickness for your specific diameter before ordering if this is a critical specification for your application.\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 diameter 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":"10mm \/ 100 Metres","offer_id":52330811982098,"sku":"GY$$$XWDZ00962x1","price":67.43,"currency_code":"USD","in_stock":true},{"title":"12mm \/ 100 Metres","offer_id":52330812014866,"sku":"GY$$$XWDZ00963x1","price":84.66,"currency_code":"USD","in_stock":true},{"title":"14mm \/ 100 Metres","offer_id":52330812047634,"sku":"GY$$$XWDZ00964x1","price":95.12,"currency_code":"USD","in_stock":true},{"title":"16mm \/ 100 Metres","offer_id":52330812080402,"sku":"GY$$$XWDZ00965x1","price":98.94,"currency_code":"USD","in_stock":true},{"title":"18mm \/ 50 Metres","offer_id":52330812113170,"sku":"GY$$$XWDZ00966x1","price":55.01,"currency_code":"USD","in_stock":true},{"title":"20mm \/ 50 Metres","offer_id":52330812145938,"sku":"GY$$$XWDZ00967x1","price":58.49,"currency_code":"USD","in_stock":true},{"title":"22mm \/ 50 Metres","offer_id":52330812178706,"sku":"GY$$$XWDZ00968x1","price":69.02,"currency_code":"USD","in_stock":true},{"title":"25mm \/ 50 Metres","offer_id":52330812211474,"sku":"GY$$$XWDZ00969x1","price":91.64,"currency_code":"USD","in_stock":true},{"title":"28mm \/ 25 Metres","offer_id":52330812244242,"sku":"GY$$$XWDZ00970x1","price":48.96,"currency_code":"USD","in_stock":true},{"title":"30mm \/ 25 Metres","offer_id":52330812277010,"sku":"GY$$$XWDZ00971x1","price":54.36,"currency_code":"USD","in_stock":true},{"title":"35mm \/ 25 Metres","offer_id":52330812309778,"sku":"GY$$$XWDZ00972x1","price":61.69,"currency_code":"USD","in_stock":true},{"title":"40mm \/ 25 Metres","offer_id":52330812342546,"sku":"GY$$$XWDZ00973x1","price":79.18,"currency_code":"USD","in_stock":true},{"title":"45mm \/ 25 Metres","offer_id":52330812375314,"sku":"GY$$$XWDZ00974x1","price":90.66,"currency_code":"USD","in_stock":true},{"title":"50mm \/ 25 Metres","offer_id":52330812408082,"sku":"GY$$$XWDZ00975x1","price":108.16,"currency_code":"USD","in_stock":true},{"title":"60mm \/ 25 Metres","offer_id":52330812440850,"sku":"GY$$$XWDZ00976x1","price":146.7,"currency_code":"USD","in_stock":true},{"title":"70mm \/ 25 Metres","offer_id":52330812473618,"sku":"GY$$$XWDZ00977x1","price":166.78,"currency_code":"USD","in_stock":true},{"title":"80mm \/ 25 Metres","offer_id":52330812506386,"sku":"GY$$$XWDZ00978x1","price":202.08,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture6of9_23f104a3-4db2-4348-9982-83fd4e678885.jpg?v=1780934714","url":"https:\/\/homediyer.com\/products\/black-heat-shrink-tubing-10mm-80mm-2-1-ratio-electrical-wire-sleeving","provider":"HomeDIYer","version":"1.0","type":"link"}