{"product_id":"30mm-heat-shrink-tubing-2-1-non-slip-waterproof-cable-sleeving","title":"30mm Heat Shrink Tubing 2:1 – Non-Slip Waterproof Cable Sleeving","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003e30mm Heat Shrink Tubing — Waterproof Cable Protection with Non-Slip Grip\u003c\/h2\u003e\n\u003cp\u003eLoose wire bundles, exposed connectors, and bare cable ends are a liability in any automotive or electrical project. Whether you're a weekend DIYer rewiring a car harness or a tradesperson tidying up a panel, unprotected cables invite moisture, abrasion, and shorts. This 30mm heat shrink tubing gives you a clean, professional finish that actually holds up.\u003c\/p\u003e\n\u003cp\u003eEach piece measures 1 metre (≈39.4\") in length with a pre-shrink inner diameter of 30mm (≈1-3\/16\"). The 2:1 shrink ratio means the tubing recovers to approximately 15mm (≈19\/32\") after heat is applied, forming a tight, non-slip sleeve around your cable or bundle. Available in Black, Red, Purple, Green, Blue, and Yellow for easy circuit identification or color-coded organization.\u003c\/p\u003e\n\u003cp\u003eTypical applications include automotive wiring harness repair, marine cable protection, DIY electrical panel builds, and outdoor junction waterproofing — all scenarios where a reliable waterproof cable sleeving solution is non-negotiable.\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 Note:\u003c\/strong\u003e Designed for cables and bundles with an outer diameter up to approximately 15mm after shrink. Verify your cable OD before ordering. Multiple colors available — select your preferred color and length above.\u003c\/div\u003e\n\u003ch2\u003e✅ Key Features of These 30mm 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 from 30mm to approximately 15mm, creating a firm, form-fitting sleeve around cables and connectors for automotive wiring harness repair.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e💧\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eWaterproof Seal\u003c\/strong\u003e — Once fully shrunk, the tubing forms a moisture-resistant barrier suitable for outdoor, marine, and under-hood environments.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🤚\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eNon-Slip Texture\u003c\/strong\u003e — The outer surface provides grip, reducing cable movement and preventing slippage in vibration-prone applications like vehicle wiring.\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 — Each 1 metre (≈39.4\") piece can be trimmed to any length with scissors; cut ends stay clean without fraying.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎨\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003e6 Color Options\u003c\/strong\u003e — Black, Red, Purple, Green, Blue, and Yellow allow color-coded cable identification, making multi-circuit wiring projects easier to trace and maintain.\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 secondary insulation layer over splices, terminals, and exposed conductors, reducing the risk of shorts in DIY electrical panel builds.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e📐 Technical Specifications — 30mm 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 (Pre-Shrink)\u003c\/th\u003e\n\u003ctd\u003e30mm (≈1-3\/16\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInner Diameter (Post-Shrink)\u003c\/th\u003e\n\u003ctd\u003eApproximately 15mm (≈19\/32\") at 2:1 ratio\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\u003eLength per Piece\u003c\/th\u003e\n\u003ctd\u003e1 metre (≈39.4\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Colors\u003c\/th\u003e\n\u003ctd\u003eBlack, Red, Purple, Green, Blue, Yellow\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003ePolyolefin (typically)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eActivation Temperature\u003c\/th\u003e\n\u003ctd\u003eSee variant options — typically 90–120°C (194–248°F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWaterproof Rating\u003c\/th\u003e\n\u003ctd\u003eMoisture-resistant seal when fully shrunk\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSurface Finish\u003c\/th\u003e\n\u003ctd\u003eNon-slip textured outer surface\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRecommended Tool\u003c\/th\u003e\n\u003ctd\u003eHeat gun\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eQuantity per Order\u003c\/th\u003e\n\u003ctd\u003e1 piece (1 metre length)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eAutomotive wiring, cable repair, outdoor electrical, marine\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\u003eHeads up:\u003c\/strong\u003e Activation temperature and exact wall thickness may vary slightly by color batch. If your application requires precise thermal specs, contact us to confirm before ordering.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-faq\"\u003e\n\u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat does the 30mm size refer to, and how do I choose the right diameter?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe 30mm refers to the inner diameter \u003cem\u003ebefore\u003c\/em\u003e shrinking. After applying heat, the tubing shrinks to approximately 15mm (about 19\/32\") at a 2:1 ratio. As a general rule, choose a pre-shrink diameter that is 20–30% larger than the cable or bundle you need to cover for a snug, secure fit. For example, a 22mm cable bundle would fit well inside this 30mm tube.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat shrink ratio does this tubing use, and what does that mean?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThis tubing uses a \u003cstrong\u003e2:1 shrink ratio\u003c\/strong\u003e, meaning it shrinks to roughly half its original inner diameter when heat is applied. A 30mm pre-shrink tube will typically recover to approximately 15mm. This ratio is standard for general-purpose cable sleeving and works well for most automotive and electrical applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs this heat shrink tubing waterproof and suitable for outdoor use?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes — once fully shrunk, this tubing generally forms a moisture-resistant seal around the cable, making it suitable for outdoor wiring, under-hood automotive use, and marine cable protection. For applications involving direct submersion or prolonged water exposure, we recommend contacting us to confirm suitability for your specific environment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat temperature is needed 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 in this category typically activates at around 90–120°C (194–248°F). A \u003cstrong\u003eheat gun\u003c\/strong\u003e is the recommended tool — it provides even, controlled heat distribution. Avoid open flames such as lighters or torches, which can cause uneven shrinkage, scorching, or damage to the cable insulation underneath.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat cables and materials is this tubing compatible with?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThis tubing is generally compatible with copper wire, aluminum conductors, and multi-strand cable bundles. It works well over standard round cables, crimp connectors, and terminal ends. For irregular-shaped bundles or very rigid cables, contact us to confirm the fit before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I cut this tubing to a shorter length?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. Each piece is 1 metre (approximately 39.4\") long and can be cut to any custom length using scissors or a utility knife — before or after shrinking. Cut ends remain clean and do not fray, so no additional finishing is needed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDoes the color I choose affect performance or durability?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eNo. All six color variants — Black, Red, Purple, Green, Blue, and Yellow — share the same material composition and 2:1 shrink ratio. Color selection is purely for visual identification, circuit organization, or aesthetic preference in your wiring project.\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":"φ30mm \/ Black \/ 1 Metre","offer_id":52330374005010,"sku":"GYWXWGZYYSG1909x1","price":4.75,"currency_code":"USD","in_stock":true},{"title":"φ30mm \/ Red \/ 1 Metre","offer_id":52330374037778,"sku":"GYWXWGZYYSG1910x1","price":5.07,"currency_code":"USD","in_stock":true},{"title":"φ30mm \/ Purple \/ 1 Metre","offer_id":52330374070546,"sku":"GYWXWGZYYSG1911x1","price":5.07,"currency_code":"USD","in_stock":true},{"title":"φ30mm \/ Green \/ 1 Metre","offer_id":52330374103314,"sku":"GYWXWGZYYSG1912x1","price":5.07,"currency_code":"USD","in_stock":true},{"title":"φ30mm \/ Blue \/ 1 Metre","offer_id":52330374136082,"sku":"GYWXWGZYYSG1913x1","price":5.07,"currency_code":"USD","in_stock":true},{"title":"φ30mm \/ Yellow \/ 1 Metre","offer_id":52330374168850,"sku":"GYWXWGZYYSG1914x1","price":5.07,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture1of11_680f7c80-d8c4-4540-984d-8e5ec11539da.jpg?v=1780906513","url":"https:\/\/homediyer.com\/products\/30mm-heat-shrink-tubing-2-1-non-slip-waterproof-cable-sleeving","provider":"HomeDIYer","version":"1.0","type":"link"}