{"product_id":"gray-2-1-heat-shrink-tubing-1mm-50mm","title":"Gray 2:1 Heat Shrink Tubing — Φ1mm to Φ50mm, 1m \/ 5m \/ 10m Lengths","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eGray 2:1 Heat Shrink Tubing — Reliable Wire Insulation from Φ1mm to Φ50mm\u003c\/h2\u003e\n\u003cp\u003eExposed wire splices, loose connector terminals, and unprotected cable bundles are a frustration for electricians, automotive technicians, hobbyists, and DIYers alike. A frayed connection in the wrong place can mean a short circuit, a failed repair, or a safety hazard. This gray 2:1 heat shrink tubing gives you a clean, professional-grade solution that seals and protects in seconds.\u003c\/p\u003e\n\u003cp\u003eEach order covers a single diameter and length combination — available in diameters from Φ1mm (≈0.04\") to Φ50mm (≈1.97\") and in lengths of 1 meter (≈39\"), 5 meters (≈196\"), or 10 meters (≈394\"). The tubing is made from flame-retardant polyolefin and shrinks to approximately half its original inner diameter (2:1 ratio) when heat is applied, forming a snug, insulating sleeve around your wire or cable.\u003c\/p\u003e\n\u003cp\u003eTypical applications include automotive wiring harness repair, marine cable protection, home electrical projects, RC hobby builds, and workshop tool cord management — anywhere a durable, heat shrink wire sleeve is needed to insulate, bundle, or identify cables.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e🔌\u003c\/span\u003e \u003cstrong\u003eCompatibility:\u003c\/strong\u003e Fits standard round wires, cables, and connector terminals. Select the diameter closest to — but larger than — your cable's outer diameter before shrinking. Works with heat guns, soldering station hot-air tools, and similar heat sources.\u003c\/div\u003e\n\u003ch2\u003e✅ Key Features of These Gray 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 — Recovers to approximately half its original inner diameter, creating a tight, form-fitting sleeve around wires, terminals, and cable bundles of varying sizes.\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 Material\u003c\/strong\u003e — Made from polyolefin, a material widely used in electrical insulation for its resistance to flame spread, helping reduce risk in wiring applications.\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 (Φ1mm–Φ50mm)\u003c\/strong\u003e — Covers everything from thin signal wires to large cable harnesses, so you can source the right heat shrink wire sleeve size without ordering from multiple suppliers.\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 1m, 5m, and 10m rolls, allowing you to cut exactly what you need for each repair or project without waste.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🚗\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eVersatile Application\u003c\/strong\u003e — Suitable for automotive wiring repair, marine cable protection, hobby electronics, and general DIY electrical work where a reliable cable insulation sleeve is required.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎨\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eNeutral Gray Finish\u003c\/strong\u003e — The gray color blends with most wiring environments and is commonly used for cable identification in multi-wire harnesses and control panels.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e📐 Technical Specifications — Gray 2:1 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\u003eFlame-retardant polyolefin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eColor\u003c\/th\u003e\n\u003ctd\u003eGray\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 (Before Shrink)\u003c\/th\u003e\n\u003ctd\u003eΦ1mm (≈0.04\") — Φ50mm (≈1.97\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Lengths\u003c\/th\u003e\n\u003ctd\u003e1m (≈39\"), 5m (≈196\"), 10m (≈394\")\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 Recovery Temperature\u003c\/th\u003e\n\u003ctd\u003eTypically ~120°C (248°F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOperating Temperature Range\u003c\/th\u003e\n\u003ctd\u003eGenerally -55°C to +125°C (-67°F to +257°F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFlame Retardancy\u003c\/th\u003e\n\u003ctd\u003eYes (polyolefin standard)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWaterproofing\u003c\/th\u003e\n\u003ctd\u003eBasic moisture resistance (not adhesive-lined; not fully waterproof)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRecommended Heat Source\u003c\/th\u003e\n\u003ctd\u003eHeat gun or hot-air tool (open flame not recommended)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePackaging\u003c\/th\u003e\n\u003ctd\u003eSingle diameter + length per order; see variant options above\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\u003eSize tip:\u003c\/strong\u003e Always measure your cable's outer diameter before ordering. Choose a tubing diameter that is larger than your cable OD before shrinking, and verify the recovered diameter will be smaller than your cable OD for a secure fit. If you need a fully waterproof seal, contact us to confirm adhesive-lined options.\u003c\/div\u003e\n\u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-faq\"\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I choose the right diameter for my wire or cable?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMeasure the outer diameter of your wire or cable bundle before shrinking. Because this tubing has a 2:1 shrink ratio, choose a size whose recovered (shrunk) diameter is slightly smaller than your cable OD. For example, Φ6mm tubing typically recovers to around Φ3mm. When in doubt, size up one step — you can always apply more heat, but you cannot un-shrink the tubing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the shrink ratio and what does 2:1 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, Φ10mm tubing generally recovers to around Φ5mm. This ratio is suitable for most standard wire insulation, connector sealing, and cable bundling tasks.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\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 typically activates at around 90°C (194°F) and fully recovers at approximately 120°C (248°F). A heat gun set to low or medium is generally sufficient. Avoid open flames, as uneven heat can cause bubbling or uneven shrinkage.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs this tubing flame-retardant and safe for electrical use?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. Polyolefin heat shrink tubing is generally flame-retardant and meets common electrical insulation requirements. It is widely used for wire splicing, terminal insulation, and connector protection in automotive, marine, and household wiring applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use this tubing outdoors or in wet environments?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eStandard 2:1 polyolefin tubing provides basic moisture resistance and is suitable for light outdoor use. However, it does not form a waterproof seal on its own. For fully waterproof connections, consider adhesive-lined (3:1 or 4:1) heat shrink tubing instead.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I cut the tubing to the length I need?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eUse sharp scissors or a utility knife to cut the tubing before shrinking. Cut slightly longer than needed — typically add 5–10mm on each end — to account for any end pull-back during the shrinking process.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat wire gauges does each diameter size fit?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eAs a general guide: Φ1–Φ2mm fits thin signal wires (typically 28–24 AWG); Φ3–Φ6mm suits standard hookup wire (22–16 AWG); Φ8–Φ12mm covers heavier power cables (14–10 AWG); Φ16–Φ25mm fits multi-conductor bundles or larger cables; Φ30–Φ50mm is suited for large cable harnesses or conduit ends. Always measure your cable OD to confirm.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your diameter and length above, then add to cart — ships from our US warehouse.\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HomeDIYer","offers":[{"title":"Φ1 \/ 1 Meter","offer_id":52329742467346,"sku":"H362-0","price":1.93,"currency_code":"USD","in_stock":true},{"title":"Φ1 \/ 5 Meter","offer_id":52329742500114,"sku":"H362-1","price":2.76,"currency_code":"USD","in_stock":true},{"title":"Φ1 \/ 10 Meter","offer_id":52329742532882,"sku":"H362-2","price":3.82,"currency_code":"USD","in_stock":true},{"title":"Φ2 \/ 1 Meter","offer_id":52329742565650,"sku":"H362-3","price":2.03,"currency_code":"USD","in_stock":true},{"title":"Φ2 \/ 5 Meter","offer_id":52329742598418,"sku":"H362-4","price":3.22,"currency_code":"USD","in_stock":true},{"title":"Φ2 \/ 10 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