{"product_id":"heat-shrink-tubing-roll-2-1-3-1-polyolefin","title":"Heat Shrink Tubing Roll — 2:1 \u0026 3:1 Polyolefin, Transparent \u0026 Red","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eHeat Shrink Tubing Rolls — Reliable Wire Protection in 2:1 \u0026amp; 3:1 Ratios\u003c\/h2\u003e\n\u003cp\u003eWhether you're rewiring a vehicle, organizing cable runs in a workshop, or protecting exposed conductors on industrial equipment, finding heat shrink tubing that fits large-diameter cables without splitting or leaving gaps is a constant challenge. Electricians, automotive technicians, and serious DIYers need a tubing solution that shrinks cleanly, holds its shape, and stays flexible after recovery — not one that cracks or peels after a few months.\u003c\/p\u003e\n\u003cp\u003eThis heat shrink tubing is made from flame-retardant polyolefin and is available in diameters from φ22mm (≈7\/8\") to φ35mm (≈1-3\/8\"), with shrink ratios of 2:1 and 3:1. Rolls come in lengths of 30m (≈98ft), 40m (≈131ft), 50m (≈164ft), and 200m (≈656ft), in transparent or red finishes. The 2:1 ratio is suited for standard insulation and bundling; the 3:1 ratio accommodates irregular shapes and connectors that need a tighter recovered fit.\u003c\/p\u003e\n\u003cp\u003eTypical applications include automotive wire harness protection, marine cable bundling, electrical conduit repair, and workshop cable management. The large-diameter options make this tubing especially useful for protecting battery cables, hydraulic hose assemblies, and multi-conductor bundles where standard small-bore tubing falls short.\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 This listing covers diameters φ22mm–φ35mm. Select your typology (diameter + shrink ratio), color, and roll length from the variant options above. For smaller wire gauges, see our other heat shrink listings.\u003c\/div\u003e\n\u003ch2\u003e✅ Key Features of These Heat Shrink Tubing Rolls\u003c\/h2\u003e\n\u003cul class=\"hdiy-features\"\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔥\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eDual Shrink Ratios\u003c\/strong\u003e — Available in 2:1 and 3:1 configurations, giving you the right recovery range for standard wire insulation or tight-fit connector sealing on large-diameter cables.\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\u003c\/strong\u003e — Made from polyolefin material that is generally self-extinguishing, providing an added layer of safety in automotive, marine, and electrical panel applications.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eLarge Diameter Range\u003c\/strong\u003e — Covers φ22mm to φ35mm (≈7\/8\" to 1-3\/8\"), making it suitable for battery cables, wire harnesses, and multi-conductor bundles that smaller tubing cannot accommodate.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎨\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eTransparent \u0026amp; Red Options\u003c\/strong\u003e — Transparent tubing lets you inspect the underlying wire or label without removing the sleeve; red provides clear color-coding for positive leads or circuit identification.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eBulk Roll Lengths\u003c\/strong\u003e — Choose from 30m, 40m, 50m, or 200m rolls. The 200m option is ideal for electricians, production shops, or anyone who needs a continuous supply without frequent reordering.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e✂️\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eEasy to Cut and Apply\u003c\/strong\u003e — Cut to any length with scissors or a utility knife; shrinks evenly with a standard heat gun. No adhesives or special tools required for clean, professional-looking results.\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 (Roll)\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\u003eShrink Ratios\u003c\/th\u003e\n\u003ctd\u003e2:1 and 3:1 (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Diameters\u003c\/th\u003e\n\u003ctd\u003eφ22mm (≈7\/8\"), φ25mm (≈1\"), φ25.4mm (1\"), φ28mm (≈1-1\/8\"), φ35mm (≈1-3\/8\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRoll Lengths\u003c\/th\u003e\n\u003ctd\u003e30m (≈98ft), 40m (≈131ft), 50m (≈164ft), 200m (≈656ft)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eColors\u003c\/th\u003e\n\u003ctd\u003eTransparent, Red\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eShrink Temperature\u003c\/th\u003e\n\u003ctd\u003eTypically begins at 70–90°C (158–194°F); full recovery at approx. 120°C (248°F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRecovered Diameter (2:1)\u003c\/th\u003e\n\u003ctd\u003eApproximately 50% of supplied diameter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRecovered Diameter (3:1)\u003c\/th\u003e\n\u003ctd\u003eApproximately 33% of supplied diameter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFlame Retardancy\u003c\/th\u003e\n\u003ctd\u003eGenerally self-extinguishing; see variant options or contact us to confirm rating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWaterproofing\u003c\/th\u003e\n\u003ctd\u003eMoisture-resistant; not fully waterproof — contact us to confirm for submersion use\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRecommended Tool\u003c\/th\u003e\n\u003ctd\u003eHeat gun (low to medium setting)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCountry of Origin\u003c\/th\u003e\n\u003ctd\u003eSee variant options\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\u003eSpec Confirmation:\u003c\/strong\u003e Exact wall thickness, voltage rating, and UL certification vary by diameter and batch. Contact us before ordering for safety-critical or high-voltage applications.\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 application?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eSelect a tubing diameter that is larger than the object you need to cover before shrinking. For a 2:1 ratio tube, the recovered diameter is typically half the supplied diameter. For example, a φ25mm (≈1\") 2:1 tube will shrink down to approximately 12.5mm (≈1\/2\"). For 3:1 ratio, a φ25.4mm (1\") tube recovers to roughly 8.5mm (≈1\/3\"). Always measure the widest point of the object and choose a size that gives at least 10–20% clearance before shrinking.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat shrink temperature is required?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003ePolyolefin heat shrink tubing generally begins to shrink at around 70–90°C (158–194°F) and achieves full recovery at approximately 120°C (248°F). A heat gun set to low-to-medium heat is typically sufficient. Avoid directing open flames directly onto the tubing, as this can cause uneven shrinkage or surface scorching.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan this tubing be used outdoors or in wet environments?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eStandard polyolefin heat shrink tubing generally provides good moisture resistance and is suitable for many outdoor applications such as automotive wiring and exterior cable runs. However, for fully waterproof sealing (e.g., submersion or direct water exposure), an adhesive-lined dual-wall heat shrink tubing is recommended. Contact us to confirm the best option for your environment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs this tubing flame-retardant?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes, polyolefin heat shrink tubing is generally manufactured to meet flame-retardant standards (typically UL224 or equivalent) and will self-extinguish when the heat source is removed in most cases. For safety-critical or high-voltage applications, please contact us to verify the specific flame-retardancy rating before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between 2:1 and 3:1 shrink ratio?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe shrink ratio describes how much the tubing reduces in diameter when heat is applied. A 2:1 ratio means the tubing shrinks to half its original diameter — ideal for standard wire insulation, cable bundling, and strain relief. A 3:1 ratio shrinks to one-third of its original diameter, making it better suited for irregular shapes, connectors, or applications where a tighter fit over a wider size range is needed, such as sealing over stepped connectors or tapered cable ends.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat cable or wire sizes does this tubing fit?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe tubing is available in diameters from φ22mm to φ35mm (approximately 7\/8\" to 1-3\/8\"), making it suitable for larger cables, wire harnesses, conduit bundles, battery cables, and hose protection. For smaller gauge wires, we recommend checking our other heat shrink listings for smaller diameter options. Contact us to confirm compatibility with your specific cable size.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow long is each roll and can I cut it to length?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eRolls are available in 30m (≈98ft), 40m (≈131ft), 50m (≈164ft), and 200m (≈656ft) lengths. The tubing can be cut to any length with standard scissors or a utility knife before shrinking. The 200m roll is ideal for workshops, electricians, or production environments that need a continuous supply on hand.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your typology, color, and length above, then add to cart — ships from our US warehouse.\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HomeDIYer","offers":[{"title":"φ25.4mm（3:1） \/ Transparent \/ 50","offer_id":52329806233874,"sku":"LLGFGLBZSJ000443x50","price":204.0,"currency_code":"USD","in_stock":true},{"title":"φ22mm（2:1） \/ Transparent \/ 200","offer_id":52329806266642,"sku":"LLGFGLBZSJ000183x200","price":476.0,"currency_code":"USD","in_stock":true},{"title":"φ25mm（2:1） \/ Transparent \/ 40","offer_id":52329806299410,"sku":"LLGFGLBZSJ000190x40","price":163.2,"currency_code":"USD","in_stock":true},{"title":"φ35mm（2:1） \/ Transparent \/ 30","offer_id":52329806332178,"sku":"LLGFGLBZSJ000211x30","price":136.0,"currency_code":"USD","in_stock":true},{"title":"φ25mm（2:1） \/ Red \/ 40","offer_id":52329806364946,"sku":"LLGFGLBZSJ000186x40","price":163.2,"currency_code":"USD","in_stock":true},{"title":"φ28mm（2:1） \/ Red \/ 40","offer_id":52329806397714,"sku":"LLGFGLBZSJ000193x40","price":163.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture1of4_7449c85d-329c-4543-aed0-5d11e6aa22b9.jpg?v=1780576669","url":"https:\/\/homediyer.com\/products\/heat-shrink-tubing-roll-2-1-3-1-polyolefin","provider":"HomeDIYer","version":"1.0","type":"link"}