{"product_id":"28mm-heat-shrink-tubing-2-1-waterproof-cable-sleeving","title":"28mm Heat Shrink Tubing 2:1 Waterproof Cable Sleeving — Non-Slip, Multi-Color","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003e28mm Heat Shrink Tubing — Waterproof Cable Protection for Automotive, Marine \u0026amp; DIY Wiring\u003c\/h2\u003e\n\u003cp\u003eExposed wire splices and bare connectors are a liability — moisture, vibration, and abrasion can cause shorts, corrosion, and costly failures. Whether you're a weekend DIYer rewiring a trailer, an auto technician bundling a harness, or a hobbyist finishing an electronics project, you need a sleeve that grips, seals, and stays put.\u003c\/p\u003e\n\u003cp\u003eEach piece of this 28mm heat shrink tubing measures 1 metre (≈39.4\") in length with a pre-shrink inner diameter of 28mm (1-1\/8\") and a 2:1 shrink ratio, reducing to approximately 14mm (9\/16\") when heat is applied. Available in six colors — Black, Red, Purple, Green, Blue, and Yellow — so you can color-code circuits at a glance. The non-slip surface texture helps the sleeve stay aligned during installation.\u003c\/p\u003e\n\u003cp\u003eTypical applications include automotive wiring harness protection, marine cable bundling, battery terminal insulation, and general-purpose electrical repair. The waterproof construction makes it a reliable choice for under-hood environments, outdoor junction boxes, and anywhere moisture resistance matters in cable heatshrink sleeving projects.\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 cables and connectors with an outer diameter up to approximately 28mm (1-1\/8\"). After shrinking at 2:1 ratio, minimum recovered diameter is approximately 14mm (9\/16\"). Suitable for standard PVC-insulated wire, multi-conductor cables, and connector boots.\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 Measure your cable bundle diameter before ordering. If your bundle is close to 28mm, contact us to confirm fit — we carry additional sizes to suit a wide range of applications.\u003c\/div\u003e\n\u003ch2\u003e✅ Key Features of These 28mm 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 — Shrinks from 28mm (1-1\/8\") down to approximately 14mm (9\/16\"), creating a firm, conforming grip around cables, connectors, and terminals for secure waterproof cable sleeving.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e💧\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eWaterproof Construction\u003c\/strong\u003e — Designed to resist moisture ingress, making it suitable for automotive underhood wiring, outdoor junction protection, and marine cable bundling applications.\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 textured outer surface prevents the sleeve from rotating or sliding during heat application, keeping it correctly positioned over the joint or splice.\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 easy circuit identification and color-coded wiring organization in complex harness or panel builds.\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 shorter length with standard scissors, reducing waste and fitting a wide range of connector and splice lengths.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔌\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eBroad Application Range\u003c\/strong\u003e — Works with standard electrical wire, battery cables, trailer wiring, and hobby electronics — anywhere you need durable, insulating heat shrink tubing for cable repair.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e📐 Technical Specifications — 28mm 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\u003e28mm (1-1\/8\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRecovered Inner Diameter (After Shrink)\u003c\/th\u003e\n\u003ctd\u003eApproximately 14mm (9\/16\") 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\u003eWaterproof\u003c\/th\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNon-Slip Surface\u003c\/th\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eActivation Temperature\u003c\/th\u003e\n\u003ctd\u003eTypically 70–150°C (158–302°F) — See variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eSee variant options \/ Contact us to confirm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWall Thickness (Before Shrink)\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRecommended Application Tool\u003c\/th\u003e\n\u003ctd\u003eHeat gun (open flame not recommended)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTypical Use Cases\u003c\/th\u003e\n\u003ctd\u003eAutomotive wiring, marine cables, battery terminals, DIY electrical repair\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 heat shrink tubing size?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eSelect a tube whose inner diameter (before shrinking) is larger than your cable or connector, but small enough that after shrinking at a 2:1 ratio it grips firmly. This 28mm (1-1\/8\") tube shrinks down to approximately 14mm (9\/16\"). Measure your cable bundle diameter and choose a size that is typically 20–30% larger than the bundle for a secure fit.\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\u003eHeat shrink tubing of this type generally activates at around 70°C (158°F) and fully shrinks at approximately 120–150°C (248–302°F). A heat gun is recommended for even, controlled shrinkage. Avoid open flames where possible to prevent uneven shrinking or scorching.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs this heat shrink tubing waterproof?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. This tubing is designed with waterproofing properties that help protect connections from moisture ingress. For fully submersed or marine applications, we recommend contacting us to confirm the specific protection level before purchase.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use this tubing on automotive wiring?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eAbsolutely. The 28mm inner diameter and 2:1 shrink ratio make it well-suited for bundling and protecting automotive wiring harnesses, battery cables, and connector boots. The non-slip texture helps keep the sleeve in place during installation, even in tight engine bay spaces.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is a 2:1 shrink ratio and why does it matter?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eA 2:1 shrink ratio means the tubing shrinks to half its original inner diameter when heat is applied. This 28mm tube will recover to approximately 14mm, creating a snug, protective sleeve. A tighter recovered fit generally means better insulation, moisture resistance, and mechanical protection for your cable or connector.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDoes the color affect performance or durability?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eNo. All six color options — Black, Red, Purple, Green, Blue, and Yellow — are made from the same material and offer identical performance. Color coding is useful for identifying circuits or wiring runs in complex installations, such as trailer wiring or multi-circuit control panels.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow long is each piece and can I cut it to a shorter length?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eEach piece is 1 metre (approximately 39.4 inches) long. It can be cut to any shorter length with scissors or a utility knife before or after shrinking, making it easy to cover short connector joints or longer cable runs without waste.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your \u003cstrong\u003ecolor and length\u003c\/strong\u003e above, then add to cart — ships from our US warehouse.\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HomeDIYer","offers":[{"title":"φ28mm \/ Black \/ 1 Metre","offer_id":52330373808402,"sku":"GYWXWGZYYSG1903x1","price":3.66,"currency_code":"USD","in_stock":true},{"title":"φ28mm \/ Red \/ 1 Metre","offer_id":52330373841170,"sku":"GYWXWGZYYSG1904x1","price":4.11,"currency_code":"USD","in_stock":true},{"title":"φ28mm \/ Purple \/ 1 Metre","offer_id":52330373873938,"sku":"GYWXWGZYYSG1905x1","price":4.11,"currency_code":"USD","in_stock":true},{"title":"φ28mm \/ Green \/ 1 Metre","offer_id":52330373906706,"sku":"GYWXWGZYYSG1906x1","price":4.11,"currency_code":"USD","in_stock":true},{"title":"φ28mm \/ Blue \/ 1 Metre","offer_id":52330373939474,"sku":"GYWXWGZYYSG1907x1","price":4.11,"currency_code":"USD","in_stock":true},{"title":"φ28mm \/ Yellow \/ 1 Metre","offer_id":52330373972242,"sku":"GYWXWGZYYSG1908x1","price":4.11,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture1of11_85b3823e-b5f5-4d04-8173-f702f6456900.jpg?v=1780906252","url":"https:\/\/homediyer.com\/de\/products\/28mm-heat-shrink-tubing-2-1-waterproof-cable-sleeving","provider":"HomeDIYer","version":"1.0","type":"link"}