{"product_id":"400mm-large-diameter-heat-shrink-tubing-battery-pack-cable-insulation","title":"400mm Large Diameter Heat Shrink Tubing for Battery Packs \u0026 Cable Insulation","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 component or cable run you need to cover, then add at least 10–15% extra to account for shrinkage along the length axis. For battery packs, generally choose a length that extends 20–30mm beyond each terminal end. Available in 1 Meter (≈39.4\\u2033), 2 Meter (≈78.7\\u2033), and 3 Meter (≈118.1\\u2033) options.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the shrink ratio of this tubing?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Large-diameter polyolefin heat shrink tubing of this type typically has a 2:1 shrink ratio, meaning it will shrink to approximately half its supplied diameter when heat is applied. The 400mm supplied diameter will generally shrink down to around 200mm. Contact us to confirm the exact ratio for your specific order.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can this tubing be used outdoors or in wet environments?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Standard polyolefin heat shrink tubing provides good moisture resistance once fully shrunk and sealed. For prolonged outdoor or submersion use, an adhesive-lined (dual-wall) variant is generally recommended. This product is suitable for indoor electrical insulation and short-term moisture protection in most DIY applications.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What temperature is needed to shrink this tubing?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Polyolefin heat shrink tubing of this type typically activates at around 90°C (194°F) and fully shrinks at approximately 120–150°C (248–302°F). A heat gun is the recommended tool. Avoid open flames, which can cause uneven shrinkage or scorching.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is this tubing compatible with lithium-ion battery packs?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. The 400mm diameter makes this tubing well-suited for wrapping large-format lithium-ion battery packs, 18650 cell groups, and similar assemblies. It provides electrical insulation and a clean, finished appearance. Always ensure the battery pack is fully assembled and cool before applying heat.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do I choose the right color?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Color choice is generally functional or organizational. Black is the most common for electrical insulation and UV resistance. Transparent allows visual inspection of the component underneath. Blue and Fruit Green are useful for color-coding different circuits, voltage levels, or battery banks in multi-pack builds.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I cut this tubing to a shorter length before shrinking?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. The tubing can be cut to any length with scissors or a utility knife before application. Cut cleanly and squarely to ensure even shrinkage at the ends. It is generally easier to cut before shrinking rather than after.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003e400mm Large Diameter Heat Shrink Tubing — Reliable Insulation for Battery Packs \u0026amp; Large Cable Assemblies\u003c\/h2\u003e\n    \u003cp\u003eWhen you're building or repairing large battery packs, cable harnesses, or industrial wiring assemblies, finding heat shrink tubing wide enough to do the job cleanly is a real challenge. Standard tubing falls short — literally. This 400mm large diameter heat shrink tubing is designed for makers, EV hobbyists, electricians, and DIYers who need a professional-grade sleeve that actually fits oversized components without improvising.\u003c\/p\u003e\n    \u003cp\u003eEach piece is supplied as a flat-width tube measuring 400mm (≈15.7\") across when laid flat, available in lengths of 1 Meter (≈39.4\"), 2 Meter (≈78.7\"), and 3 Meter (≈118.1\"). Made from polyolefin material, it offers consistent wall thickness, clean shrinkage, and reliable electrical insulation. Choose from Black, Blue, Transparent, or Fruit Green to suit your build or color-coding system.\u003c\/p\u003e\n    \u003cp\u003eTypical applications include wrapping 18650 lithium-ion battery pack assemblies, insulating large-gauge cable splices and bus bars, protecting copper tubing or conduit ends, and finishing custom power tool battery rebuilds — all scenarios where standard heat shrink tubing for battery wraps simply isn't wide enough.\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 components with a circumference of up to approximately 400mm flat-width. Verify your battery pack or cable bundle diameter before ordering. Shrink ratio is typically 2:1 — contact us to confirm for your application.\n  \u003c\/div\u003e\n\n  \u003ch2\u003e✅ Key Features of These 400mm Large Diameter 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\u003eBattery Pack Ready\u003c\/strong\u003e — 400mm flat-width diameter is sized specifically for large-format lithium-ion battery pack wraps, 18650 cell groups, and custom power bank builds.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔥\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eConsistent Heat Activation\u003c\/strong\u003e — Polyolefin construction shrinks evenly with a heat gun, typically activating around 90°C (194°F), reducing the risk of scorching or uneven coverage on large surfaces.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎨\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003e4 Color Options for Circuit Identification\u003c\/strong\u003e — Black, Blue, Transparent, and Fruit Green allow color-coded organization across multi-bank battery systems or complex cable harness assemblies.\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 1M, 2M, and 3M lengths, the tubing cuts cleanly with scissors or a utility knife before application, minimizing waste on varied project sizes.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eElectrical Insulation \u0026amp; Moisture Resistance\u003c\/strong\u003e — Once fully shrunk, the sleeve provides a snug insulating barrier suitable for protecting cable splices, bus bars, and terminal connections from incidental moisture and abrasion.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e👁️\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eTransparent Option for Visual Inspection\u003c\/strong\u003e — The clear variant lets you inspect solder joints, cell labels, or wire routing underneath the sleeve without removing it — useful for maintenance-friendly battery pack builds.\u003c\/span\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003e📐 Technical Specifications — 400mm Large Diameter 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\u003eLarge Diameter Heat Shrink Tubing\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eFlat Width (Supplied)\u003c\/th\u003e\n\u003ctd\u003e400mm (≈15.7\")\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eShrink Ratio\u003c\/th\u003e\n\u003ctd\u003eTypically 2:1 — contact us to confirm\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eApproximate Shrunk Diameter\u003c\/th\u003e\n\u003ctd\u003eSee variant options \/ contact us to confirm\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\u003eAvailable Colors\u003c\/th\u003e\n\u003ctd\u003eBlack, Blue, Transparent, Fruit Green\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\u003eActivation Temperature\u003c\/th\u003e\n\u003ctd\u003eTypically ~90°C (194°F)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eFull Shrink Temperature\u003c\/th\u003e\n\u003ctd\u003eTypically 120–150°C (248–302°F)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eWall Thickness (Shrunk)\u003c\/th\u003e\n\u003ctd\u003eSee variant options \/ contact us to confirm\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eApplication Tool\u003c\/th\u003e\n\u003ctd\u003eHeat gun (recommended); avoid open flame\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eTypical Use\u003c\/th\u003e\n\u003ctd\u003eBattery pack wraps, cable insulation, bus bar protection, DIY electrical repairs\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 Wall thickness and exact shrunk diameter vary by production batch. If your project has tight clearance tolerances, please contact us before ordering to confirm current specifications.\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 component or cable run you need to cover, then add at least 10–15% extra to account for shrinkage along the length axis. For battery packs, generally choose a length that extends 20–30mm beyond each terminal end. Available in 1 Meter (≈39.4\"), 2 Meter (≈78.7\"), and 3 Meter (≈118.1\") options.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat is the shrink ratio of this tubing?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eLarge-diameter polyolefin heat shrink tubing of this type typically has a 2:1 shrink ratio, meaning it will shrink to approximately half its supplied diameter when heat is applied. The 400mm supplied flat-width will generally shrink down to around 200mm. Contact us to confirm the exact ratio for your specific order.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan this 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 provides good moisture resistance once fully shrunk and sealed. For prolonged outdoor or submersion use, an adhesive-lined (dual-wall) variant is generally recommended. This product is suitable for indoor electrical insulation and short-term moisture protection in most DIY applications.\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\u003ePolyolefin heat shrink tubing of this type typically activates at around 90°C (194°F) and fully shrinks at approximately 120–150°C (248–302°F). A heat gun is the recommended tool. Avoid open flames, which can cause uneven shrinkage or scorching on large-diameter sleeves.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eIs this tubing compatible with lithium-ion battery packs?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eYes. The 400mm flat-width diameter makes this tubing well-suited for wrapping large-format lithium-ion battery packs, 18650 cell groups, and similar assemblies. It provides electrical insulation and a clean, finished appearance. Always ensure the battery pack is fully assembled and cool before applying heat.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eHow do I choose the right color?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eColor choice is generally functional or organizational. Black is the most common for electrical insulation and UV resistance. Transparent allows visual inspection of the component underneath without removing the sleeve. Blue and Fruit Green are useful for color-coding different circuits, voltage levels, or battery banks in multi-pack builds.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan I cut this tubing to a shorter length before shrinking?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eYes. The tubing can be cut to any length with scissors or a utility knife before application. Cut cleanly and squarely to ensure even shrinkage at the ends. It is generally easier to cut before shrinking rather than after.\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 \/ 1 Meter","offer_id":52310912532754,"sku":"GLFBFHHGZPLDZ081x1","price":33.96,"currency_code":"USD","in_stock":true},{"title":"Blue \/ 1 Meter","offer_id":52310912565522,"sku":"GLFBFHHGZPLDZ082x1","price":33.96,"currency_code":"USD","in_stock":true},{"title":"Transparent \/ 1 Meter","offer_id":52310912598290,"sku":"GLFBFHHGZPLDZ083x1","price":33.96,"currency_code":"USD","in_stock":true},{"title":"Fruit Green \/ 1 Meter","offer_id":52310912631058,"sku":"GLFBFHHGZPLDZ084x1","price":33.96,"currency_code":"USD","in_stock":true},{"title":"Black \/ 2 Meter","offer_id":52310912663826,"sku":"GLFBFHHGZPLDZ081x2","price":65.82,"currency_code":"USD","in_stock":true},{"title":"Blue \/ 2 Meter","offer_id":52310912696594,"sku":"GLFBFHHGZPLDZ082x2","price":65.82,"currency_code":"USD","in_stock":true},{"title":"Transparent \/ 2 Meter","offer_id":52310912729362,"sku":"GLFBFHHGZPLDZ083x2","price":65.82,"currency_code":"USD","in_stock":true},{"title":"Fruit Green \/ 2 Meter","offer_id":52310912762130,"sku":"GLFBFHHGZPLDZ084x2","price":65.82,"currency_code":"USD","in_stock":true},{"title":"Black \/ 3 Meter","offer_id":52310912794898,"sku":"GLFBFHHGZPLDZ081x3","price":107.26,"currency_code":"USD","in_stock":true},{"title":"Blue \/ 3 Meter","offer_id":52310912827666,"sku":"GLFBFHHGZPLDZ082x3","price":107.26,"currency_code":"USD","in_stock":true},{"title":"Transparent \/ 3 Meter","offer_id":52310912860434,"sku":"GLFBFHHGZPLDZ083x3","price":107.26,"currency_code":"USD","in_stock":true},{"title":"Fruit Green \/ 3 Meter","offer_id":52310912893202,"sku":"GLFBFHHGZPLDZ084x3","price":107.26,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Main-01_1_bafebaba-ebbc-4f29-acf9-eebcea5b59ec.jpg?v=1780649413","url":"https:\/\/homediyer.com\/de\/products\/400mm-large-diameter-heat-shrink-tubing-battery-pack-cable-insulation","provider":"HomeDIYer","version":"1.0","type":"link"}