{"product_id":"brown-heat-shrink-tubing-2-1-ratio-1mm-50mm","title":"Brown Heat Shrink Tubing 2:1 Ratio — 1mm to 50mm Diameter","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eBrown Heat Shrink Tubing — Reliable Wire Insulation \u0026amp; Cable Sleeving for Automotive, DIY \u0026amp; Industrial Use\u003c\/h2\u003e\n\u003cp\u003eExposed wire splices, frayed cable ends, and unprotected connectors are a safety hazard and a reliability nightmare — whether you're rewiring a vehicle, repairing home appliances, or building a custom electronics project. This brown heat shrink tubing gives electricians, automotive technicians, hobbyists, and DIYers a clean, durable way to insulate and protect wiring in seconds.\u003c\/p\u003e\n\u003cp\u003eEach listing covers a single continuous length of tubing in your chosen diameter and length combination. Diameters range from φ1mm to φ50mm (unshrunk), with lengths available from 1 metre (≈3.3 ft) up to 10 metres (≈32.8 ft). The 2:1 shrink ratio means the tubing shrinks to approximately half its listed diameter when heat is applied — for example, φ10mm (≈3\/8\") shrinks down to roughly φ5mm (≈3\/16\"). Material is polyolefin, offering a balance of flexibility, electrical insulation, and resistance to moisture and common chemicals.\u003c\/p\u003e\n\u003cp\u003eTypical applications include automotive wiring harness repair and color-coded circuit identification, marine and outdoor cable protection against moisture and UV, and workshop or home electrical projects requiring neat, professional-looking wire sleeving. The brown color is widely used in automotive and industrial wiring standards for phase or circuit identification.\u003c\/p\u003e\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003eℹ️\u003c\/span\u003e \u003cstrong\u003eCompatibility:\u003c\/strong\u003e Fits standard metric and AWG wire sizes. Select the unshrunk diameter that is at least 10–20% larger than your cable's outer diameter. The 2:1 ratio ensures a snug, secure fit after shrinking.\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 If you are unsure which diameter to order, measure your cable OD in mm and choose the next size up. Contact us to confirm if you need help matching a specific wire gauge.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2\u003e✅ Key Features of These Brown 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\u003e2:1 Shrink Ratio\u003c\/strong\u003e — Shrinks to approximately half its listed diameter, creating a tight, conforming seal around wires, connectors, and cable bundles for secure heat shrink wire insulation.\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\u003c\/strong\u003e — Available from φ1mm to φ50mm (unshrunk), covering everything from thin signal wires to large power cables and conduit bundles in a single product line.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🚗\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eAutomotive-Grade Brown Color\u003c\/strong\u003e — Brown is a recognized color in automotive and industrial wiring color codes, making it easy to identify circuits at a glance during maintenance or troubleshooting.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e💧\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eMoisture \u0026amp; Chemical Resistance\u003c\/strong\u003e — Polyolefin construction provides general resistance to water, oils, and common automotive fluids, suitable for engine bay wiring and outdoor cable sleeving applications.\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 continuous lengths from 1m to 10m so you can cut exactly what you need for each job, minimizing waste on multi-wire harness repairs.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚡\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eElectrical Insulation\u003c\/strong\u003e — Provides a protective insulating layer over bare wire splices, solder joints, and terminals, reducing the risk of short circuits in DIY electrical projects and professional installations.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e📐 Technical Specifications — 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 \/ Cable Heatshrink Sleeving\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eColor\u003c\/th\u003e\n\u003ctd\u003eBrown\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\u003eShrink Ratio\u003c\/th\u003e\n\u003ctd\u003e2:1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDiameter (Unshrunk)\u003c\/th\u003e\n\u003ctd\u003eφ1mm – φ50mm (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDiameter (After Shrink, approx.)\u003c\/th\u003e\n\u003ctd\u003eφ0.5mm – φ25mm (approximately half of unshrunk)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Lengths\u003c\/th\u003e\n\u003ctd\u003e1m (≈3.3 ft), 2m, 3m, 4m, 5m, 6m, 8m, 10m (≈32.8 ft)\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\u003eOperating Temperature Range\u003c\/th\u003e\n\u003ctd\u003eSee variant options \/ Contact us to confirm\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\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFlexibility\u003c\/th\u003e\n\u003ctd\u003eFlexible after shrinking\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eApplication Method\u003c\/th\u003e\n\u003ctd\u003eHeat gun recommended; avoid direct open flame\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTypical Use\u003c\/th\u003e\n\u003ctd\u003eAutomotive wiring, cable repair, wire insulation, DIY electronics\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\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 the cable or connector you need to cover. Choose a heat shrink size whose unshrunk inner diameter is at least 10–20% larger than your cable's OD. With a 2:1 shrink ratio, the tubing will shrink to approximately half its listed diameter — for example, φ6mm (unshrunk) shrinks to roughly 3mm (≈1\/8\"). When in doubt, size up rather than down.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat shrink ratio does this tubing use?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThis tubing uses a 2:1 shrink ratio, meaning it shrinks to approximately half its original listed diameter when heat is applied. This is the most common ratio for general-purpose wire insulation and cable sleeving, and is suitable for the vast majority of automotive, DIY, and industrial wiring 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\u003eMost polyolefin-based 2:1 heat shrink tubing typically activates at around 90°C (194°F) and fully shrinks at approximately 120°C (248°F). A heat gun is recommended for even, controlled shrinkage. Avoid open flames where possible, as uneven heat can cause the tubing to shrink unevenly or scorch.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan this brown heat shrink tubing be used outdoors or in automotive applications?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. Polyolefin heat shrink tubing is generally resistant to moisture, UV exposure, and common automotive fluids, making it suitable for engine bays, outdoor wiring runs, and marine environments. For highly corrosive or fully submerged applications, we recommend confirming suitability with your specific use case or contacting us for guidance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs this tubing compatible with standard wire gauges?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. The range of diameters (φ1mm–φ50mm unshrunk) covers most standard wire gauges from thin signal wires up to large power cables and conduit bundles. In general, φ1mm–φ3mm suits AWG 20–28 signal wires, φ4mm–φ10mm covers AWG 10–18 power wires, and φ12mm–φ50mm is typically used for cable bundles, conduit, and large connectors. Contact us if you need help matching a specific gauge.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I cut this tubing to a custom length?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eAbsolutely. The tubing is sold in continuous lengths (1m, 2m, 3m, 4m, 5m, 6m, 8m, and 10m) and can be cut to any length with scissors or a utility knife before shrinking. Cutting after shrinking is also possible but generally less clean. Buying a longer length gives you more flexibility for multiple jobs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhy choose brown heat shrink tubing instead of black?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eBrown is commonly used in automotive wiring harnesses and industrial color-coding systems to identify specific circuits or phases. It provides the same electrical insulation and mechanical protection as black tubing while helping technicians quickly identify wiring at a glance — particularly useful in multi-wire harnesses where color differentiation reduces troubleshooting time.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow much tubing do I need for a typical wiring job?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThis depends on the number of connections and the length of each sleeve. For a typical automotive repair with 10–20 wire splices, a 5m length in the appropriate diameter is generally sufficient. For larger harness builds or workshop stock, 10m lengths offer better value per metre. We recommend buying slightly more than you think you need to account for test cuts and sizing checks.\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":"φ1mm \/ 5 metre","offer_id":52329890382098,"sku":"GLFBLFFGLBZSJ000264x5","price":2.45,"currency_code":"USD","in_stock":true},{"title":"φ1.5mm \/ 5 metre","offer_id":52329890414866,"sku":"GLFBLFFGLBZSJ096172x5","price":2.61,"currency_code":"USD","in_stock":true},{"title":"φ2mm \/ 5 metre","offer_id":52329890447634,"sku":"GLFBLFFGLBZSJ000265x5","price":2.61,"currency_code":"USD","in_stock":true},{"title":"φ2.5mm \/ 5 metre","offer_id":52329890480402,"sku":"GLFBLFFGLBZSJ096173x5","price":2.87,"currency_code":"USD","in_stock":true},{"title":"φ3mm \/ 5 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metre","offer_id":52329891430674,"sku":"GLFBLFFGLBZSJ000273x6","price":8.95,"currency_code":"USD","in_stock":true},{"title":"φ16mm \/ 4 metre","offer_id":52329891463442,"sku":"GLFBLFFGLBZSJ000275x4","price":7.87,"currency_code":"USD","in_stock":true},{"title":"φ20mm \/ 3 metre","offer_id":52329891496210,"sku":"GLFBLFFGLBZSJ000276x3","price":7.7,"currency_code":"USD","in_stock":true},{"title":"φ25mm \/ 2 metre","offer_id":52329891528978,"sku":"GLFBLFFGLBZSJ000277x2","price":7.32,"currency_code":"USD","in_stock":true},{"title":"φ30mm \/ 2 metre","offer_id":52329891561746,"sku":"GLFBLFFGLBZSJ000278x2","price":8.95,"currency_code":"USD","in_stock":true},{"title":"φ40mm \/ 2 metre","offer_id":52329891594514,"sku":"GLFBLFFGLBZSJ000279x2","price":11.64,"currency_code":"USD","in_stock":true},{"title":"φ50mm \/ 2 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