{"product_id":"6-4mm-heat-shrink-tubing-waterproof-electrical-sleeving","title":"6.4mm Heat Shrink Tubing – Waterproof Electrical Sleeving, 8 Colors","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003e6.4mm Heat Shrink Tubing — Reliable Waterproof Insulation for Every Wire Job\u003c\/h2\u003e\n\u003cp\u003eWhether you're a DIY enthusiast tackling a home electrical project or a professional dealing with automotive wiring repairs, exposed wire splices and bare connections are a constant hazard. Moisture, abrasion, and accidental contact can turn a small oversight into a costly failure. This 6.4mm heat shrink tubing gives you a clean, durable, waterproof seal that protects your work and keeps it looking professional.\u003c\/p\u003e\n\u003cp\u003eEach order covers a single continuous length of tubing in your chosen color and length. The inner diameter is φ6.4mm (≈1\/4\") before shrinking — available in 1 metre (≈3.3 ft), 2 metre (≈6.6 ft), 5 metre (≈16.4 ft), and 10 metre (≈32.8 ft) options. Made from polyolefin, this tubing is flexible, flame-retardant, and compatible with standard 2:1 shrink-ratio applications. Choose from 8 colors — Black, White, Red, Green, Yellow, Blue, Transparent, and Orange — for easy circuit identification.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include insulating wire splices in home electrical panels, color-coding automotive wiring harnesses, protecting marine cable connections from corrosion, and bundling low-voltage wires in DIY electronics projects. The transparent variant is especially popular for applications where you need to see the wire beneath the sleeving.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003eℹ️\u003c\/span\u003e \u003cstrong\u003eCompatibility:\u003c\/strong\u003e Fits wire bundles and connectors up to φ6.4mm (≈1\/4\") in diameter. Shrinks to approximately 3.2mm at a 2:1 ratio. Compatible with standard heat guns. Suitable for 12V–240V insulation applications — confirm voltage rating with us for high-voltage use.\u003c\/div\u003e\n\u003ch2\u003e✅ Key Features of These 6.4mm 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\u003eWaterproof Seal\u003c\/strong\u003e — Forms a tight, moisture-resistant barrier around wire splices and connectors, ideal for outdoor wiring and marine cable protection.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔥\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003ePolyolefin Construction\u003c\/strong\u003e — Made from flame-retardant polyolefin material that generally withstands temperatures up to 125°C (257°F) after shrinking, suitable for automotive and industrial environments.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎨\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003e8 Color Options\u003c\/strong\u003e — Available in Black, White, Red, Green, Yellow, Blue, Transparent, and Orange for color-coded wire identification in multi-circuit installations.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003e4 Length Choices\u003c\/strong\u003e — Order exactly what you need: 1m, 2m, 5m, or 10m per roll, minimizing waste on small repairs or covering large wiring harness projects.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚡\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003e2:1 Shrink Ratio\u003c\/strong\u003e — Shrinks uniformly from φ6.4mm (1\/4\") down to approximately 3.2mm, creating a snug fit around wires, terminals, and connectors without gaps.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔧\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eEasy Heat-Gun Application\u003c\/strong\u003e — Activates at around 90°C (194°F) with a standard heat gun; no special tools required, making it accessible for both DIY electrical sleeving and professional cable repair work.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e📐 Technical Specifications — 6.4mm Heat Shrink Tubing\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eInner Diameter (Before Shrink)\u003c\/th\u003e\n\u003ctd\u003eφ6.4mm (≈1\/4\" \/ 0.25\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInner Diameter (After Shrink)\u003c\/th\u003e\n\u003ctd\u003eApproximately 3.2mm (2:1 ratio)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eShrink Ratio\u003c\/th\u003e\n\u003ctd\u003e2:1 (typically)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003ePolyolefin (flame-retardant)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOperating Temperature (After Shrink)\u003c\/th\u003e\n\u003ctd\u003eGenerally up to 125°C (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 ~90°C (194°F), fully shrinks 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, Orange\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\u003eWaterproof\u003c\/th\u003e\n\u003ctd\u003eYes — moisture-resistant seal when properly applied\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFlame Retardant\u003c\/th\u003e\n\u003ctd\u003eYes (polyolefin standard)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eVoltage Rating\u003c\/th\u003e\n\u003ctd\u003eSee variant options — contact us to confirm for high-voltage use\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\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-note\"\u003e\n\u003cspan class=\"hdiy-note-icon\"\u003e⚠️\u003c\/span\u003e \u003cstrong\u003eNote:\u003c\/strong\u003e Specifications such as exact voltage rating and wall thickness may vary by batch. If your application has strict electrical or thermal requirements, please contact us before ordering to confirm the exact spec sheet.\u003c\/div\u003e\n\u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-faq\"\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat does 6.4mm inner diameter mean, and will it fit my wire?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003e6.4mm (approximately 1\/4\" or 0.25\") is the inner diameter \u003cem\u003ebefore\u003c\/em\u003e shrinking. This tubing typically shrinks to about half its original diameter (2:1 ratio), ending up around 3.2mm after heat is applied. For a secure fit, choose tubing whose pre-shrink ID is slightly larger than your wire or bundle — generally 10–20% larger works well. For example, a 5mm wire bundle fits comfortably inside 6.4mm tubing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow much length do I need for my project?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMeasure the total length of wire or splice you need to cover, then add a small overlap on each end — typically 5–10mm (about 1\/4\") per side. For single wire repairs or small DIY jobs, 1m or 2m is usually sufficient. For automotive wiring harnesses, marine installations, or larger projects, the 5m or 10m options offer better value per meter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat shrink ratio does this tubing have, and how does that affect sizing?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThis heat shrink tubing generally operates at a \u003cstrong\u003e2:1 shrink ratio\u003c\/strong\u003e, meaning it shrinks to approximately half its original inner diameter when heat is applied. Starting at φ6.4mm, it will typically shrink down to around 3.2mm. This makes it suitable for wires and connectors in the 3–6mm range. If you need a tighter or looser fit, contact us to confirm the exact ratio for your variant.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs this tubing suitable for outdoor or waterproof applications?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. This tubing is designed to provide a waterproof, moisture-resistant seal when properly applied with a heat gun. It is suitable for outdoor wiring, marine cable connections, and automotive use where exposure to rain or humidity is a concern. For fully submersed or high-pressure water environments, we recommend confirming the specific IP rating with us before purchase.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat temperature do I need to shrink this tubing, and what tool should I use?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003ePolyolefin heat shrink tubing typically begins to activate at around \u003cstrong\u003e90°C (194°F)\u003c\/strong\u003e and fully shrinks at approximately \u003cstrong\u003e120°C (248°F)\u003c\/strong\u003e. A standard heat gun is the recommended tool — most heat guns with a low setting work well. Avoid using open flames (lighters, torches) where possible, as uneven heat can cause bubbling, uneven shrinkage, or scorching.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use this for automotive wiring repairs?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes, 6.4mm heat shrink tubing is commonly used for automotive wire splices, connector insulation, and wiring harness protection. It generally withstands the temperature ranges found in under-dash and cabin environments. For high-heat zones such as near the engine block or exhaust, we recommend verifying the rated operating temperature before use — contact us to confirm.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDoes the color affect the tubing's performance or durability?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eNo — all color variants share the same polyolefin material and performance characteristics. Color is purely for identification purposes. Color-coding is especially useful in multi-wire installations, electrical panels, or automotive harnesses where distinguishing circuits at a glance saves time and reduces errors.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your color and length above, then add to cart — ships from our US warehouse.\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HomeDIYer","offers":[{"title":"Black \/ φ6.4mm \/ 1 Metre","offer_id":52330358178066,"sku":"GYWXWGLBZSJ000395x1","price":2.03,"currency_code":"USD","in_stock":true},{"title":"White \/ φ6.4mm \/ 1 Metre","offer_id":52330358210834,"sku":"GYWXWGLBZSJ000396x1","price":2.18,"currency_code":"USD","in_stock":true},{"title":"Red \/ φ6.4mm \/ 1 Metre","offer_id":52330358243602,"sku":"GYWXWGLBZSJ000397x1","price":2.18,"currency_code":"USD","in_stock":true},{"title":"Green \/ φ6.4mm \/ 1 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\/ 5 Metre","offer_id":52330358931730,"sku":"GYWXWGLBZSJ096180x5","price":6.5,"currency_code":"USD","in_stock":true},{"title":"Black \/ φ6.4mm \/ 10 Metre","offer_id":52330358964498,"sku":"GYWXWGLBZSJ000395x10","price":11.26,"currency_code":"USD","in_stock":true},{"title":"White \/ φ6.4mm \/ 10 Metre","offer_id":52330358997266,"sku":"GYWXWGLBZSJ000396x10","price":12.27,"currency_code":"USD","in_stock":true},{"title":"Red \/ φ6.4mm \/ 10 Metre","offer_id":52330359030034,"sku":"GYWXWGLBZSJ000397x10","price":12.27,"currency_code":"USD","in_stock":true},{"title":"Green \/ φ6.4mm \/ 10 Metre","offer_id":52330359062802,"sku":"GYWXWGLBZSJ000398x10","price":12.27,"currency_code":"USD","in_stock":true},{"title":"Yellow \/ φ6.4mm \/ 10 Metre","offer_id":52330359095570,"sku":"GYWXWGLBZSJ000399x10","price":12.27,"currency_code":"USD","in_stock":true},{"title":"Blue \/ φ6.4mm \/ 10 Metre","offer_id":52330359128338,"sku":"GYWXWGLBZSJ000400x10","price":12.27,"currency_code":"USD","in_stock":true},{"title":"Transparent \/ φ6.4mm \/ 10 Metre","offer_id":52330359161106,"sku":"GYWXWGLBZSJ000401x10","price":12.27,"currency_code":"USD","in_stock":true},{"title":"Orange \/ φ6.4mm \/ 10 Metre","offer_id":52330359193874,"sku":"GYWXWGLBZSJ096180x10","price":12.27,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture_11_of_13_3ece0ef0-d113-43af-86bb-b1930a4cd206.jpg?v=1780890847","url":"https:\/\/homediyer.com\/products\/6-4mm-heat-shrink-tubing-waterproof-electrical-sleeving","provider":"HomeDIYer","version":"1.0","type":"link"}