{"product_id":"100-ft-1-in-25mm-polyolefin-black-heat-shrink-tubing-2-1-ratio","title":"100 FT 1 in 25mm Polyolefin Black Heat Shrink Tubing 2:1 Ratio","description":"\u003cp\u003eIn this review the 100 ft 1 in 25mm polyolefin black heat shrink tubing is presented as a practical, professional-grade option for electrical and hobby work; the single biggest reason to buy is its combination of a true \u003cstrong\u003e2:1 shrink ratio\u003c\/strong\u003e and reliable thermal and electrical ratings that make it suitable for demanding installations. The reviewer found it especially useful for automotive wiring, solder joints and cable bundling where a consistent shrink performance and flame retardancy are required.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eShrink Ratio:\u003c\/strong\u003e The 2:1 ratio shrinks the tubing to half its original diameter, providing a snug, neat fit over connectors and splices.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlame Retardant:\u003c\/strong\u003e UL224 125 C rating ensures the material resists ignition for safer use around heat sources and wiring harnesses.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide Temperature Range:\u003c\/strong\u003e Rated from -55 C to +135 C it works across cold starts and high engine-bay temperatures without becoming brittle or soft.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElectrical Rating:\u003c\/strong\u003e 600V voltage rating and UL Listed\/CSA Certified construction make it suitable for many electrical insulation tasks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersatile Applications:\u003c\/strong\u003e Useful for strain relief, cable bonding, color-coding, and corrosion protection across industrial and DIY projects.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLong Length:\u003c\/strong\u003e The 100 ft roll reduces waste and is convenient for multiple small jobs or a single large harness run.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis tubing is aimed at electricians, automotive enthusiasts, and makers who need a dependable, flame-retardant insulation solution with a predictable \u003cstrong\u003e2:1 shrink ratio\u003c\/strong\u003e. It suits repair work, wire marking, solder insulation and bundling where consistent thermal and electrical ratings are important.\u003c\/p\u003e\n\u003cp\u003eThose who should look elsewhere include users needing specialized adhesive-lined heat shrink for waterproof seals or applications that require a higher shrink ratio than 2:1. If visual matching to a wide palette of colors is critical, consider buying from a supplier offering explicit color assortments rather than a single black roll.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWorks well in automotive and electrical contexts due to its reliable shrinkage and durability.\u003c\/li\u003e\n\u003cli\u003eHigh temperature tolerance and flame retardant UL224 125 C rating add safety for wire harnesses.\u003c\/li\u003e\n\u003cli\u003eUL Listed, CSA Certified and RoHS Compliant, making it suitable for regulated installations.\u003c\/li\u003e\n\u003cli\u003eLong 100 ft length provides good value for multiple projects and reduces the need for frequent reorders.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSome users report roll length expectations differ, so verify delivered footage if exact length matters.\u003c\/li\u003e\n\u003cli\u003eBlack only in this listing may limit color-coding flexibility for some projects.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003e100 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Diameter\u003c\/td\u003e\n\u003ctd\u003e1 in (25 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShrink Ratio\u003c\/td\u003e\n\u003ctd\u003e2:1 (shrinks to 1\/2 original diameter)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage Rating\u003c\/td\u003e\n\u003ctd\u003e600 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e-55 C to +135 C (-67 to 275 F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandards\u003c\/td\u003e\n\u003ctd\u003eUL Listed, CSA Certified, RoHS Compliant, UL224 125 C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe 100 ft 1 in polyolefin heat shrink tubing is a solid, value-oriented choice for electricians, auto hobbyists and makers who need dependable insulation with certified flame retardancy and a proven \u003cstrong\u003e2:1 shrink\u003c\/strong\u003e performance. It delivers durable protection and broad temperature tolerance, making it a practical buy when black tubing and length are acceptable.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWill this tubing seal out moisture?\u003c\/strong\u003e\u003cbr\u003eIt is standard polyolefin heat shrink for insulation and protection but is not adhesive-lined; it provides abrasion and corrosion protection but not guaranteed waterproof sealing.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan it be used on automotive wiring near the engine?\u003c\/strong\u003e\u003cbr\u003eYes, the -55 C to +135 C temperature rating and flame retardant UL224 125 C classification make it suitable for many engine-bay applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it meet safety standards?\u003c\/strong\u003e\u003cbr\u003eYes, it is UL Listed, CSA Certified and RoHS Compliant with a 600 V rating for typical electrical insulation tasks.\u003c\/p\u003e","brand":"225FWY","offers":[{"title":"Default Title","offer_id":48631686529243,"sku":"B071SDHHC6","price":37.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/81R12AXgcSL._SL1500.jpg?v=1778441543","url":"https:\/\/gearmusthave.com\/products\/100-ft-1-in-25mm-polyolefin-black-heat-shrink-tubing-2-1-ratio","provider":"GearMustHave","version":"1.0","type":"link"}