{"product_id":"3-1-adhesive-dual-wall-heat-shrink-tubing-transparent-1-6-30mm","title":"3:1 Adhesive Dual Wall Heat Shrink Tubing – Transparent 1.6-30mm","description":"\n\u003ch2\u003eTransparent Adhesive-Lined Dual Wall Heat Shrink Tubing — 1 Roll\u003c\/h2\u003e\n\u003cp\u003eProtect, insulate, and seal wires and cables with confidence using this professional-grade \u003cstrong\u003edual wall heat shrink tubing\u003c\/strong\u003e. Featuring a \u003cstrong\u003e3:1 shrink ratio\u003c\/strong\u003e and an inner adhesive lining, this tube bonds tightly to a wide range of surfaces — including plastic, rubber, and metal — creating a robust, moisture-resistant seal that's ideal for demanding electrical and DIY applications. Available in inner diameters from \u003cstrong\u003e1.6 mm to 30 mm\u003c\/strong\u003e, this roll covers a versatile range of cable and wire sizes.\u003c\/p\u003e\n\n\u003ch3\u003eWhy Choose Dual Wall Adhesive Heat Shrink Tubing?\u003c\/h3\u003e\n\u003cp\u003eUnlike standard single-wall tubing, dual wall construction combines an outer polyethylene (PE) shell with a hot-melt adhesive inner layer. When heated, the outer layer shrinks firmly around the cable while the adhesive melts and flows into gaps, forming a watertight, strain-relieving bond. This makes it the go-to solution for marine wiring, outdoor electrical installations, automotive harnesses, and any application requiring enhanced mechanical protection.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e3:1 Shrink Ratio\u003c\/strong\u003e — Accommodates irregular shapes and large diameter changes for a snug, professional finish\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAdhesive Inner Layer\u003c\/strong\u003e — Hot-melt glue bonds to plastic, rubber, and metal surfaces for a secure, sealed connection\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTransparent Design\u003c\/strong\u003e — Allows easy visual inspection of the cable or connector underneath\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Diameter Range\u003c\/strong\u003e — Supplied inner diameters from 1.6 mm to 30 mm to suit most wire and cable sizes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCE Certified\u003c\/strong\u003e — Meets European safety and performance standards\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMedium Wall Thickness\u003c\/strong\u003e — Balances flexibility with strong mechanical protection\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBroad Operating Temperature\u003c\/strong\u003e — Rated from -40°C to +125°C for both extreme cold and high-heat environments\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: PE (Polyethylene)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShrink Ratio\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3:1\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePE (Polyethylene) with hot-melt adhesive inner layer\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInitial Contraction Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e70°C\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFull Shrinkage Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e125°C\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInner Layer Melt Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e70°C – 100°C\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Temperature Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-40°C to +125°C\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAvailable Diameters\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.6 mm – 30 mm (inner diameter)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCertification\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCE\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eColor\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTransparent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCommon Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eElectrical wire and cable insulation \u0026amp; bundling\u003c\/li\u003e\n  \u003cli\u003eWaterproofing connectors, splices, and terminals\u003c\/li\u003e\n  \u003cli\u003eAutomotive and marine wiring harness protection\u003c\/li\u003e\n  \u003cli\u003eDIY electronics and hobby projects\u003c\/li\u003e\n  \u003cli\u003eIndustrial and outdoor cable management\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003eMade in Mainland China.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eExplore More DIY \u0026amp; Electrical Tools\u003c\/h3\u003e\n\u003cp\u003eLooking for more tools and accessories for your projects? Check out these related products:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/air-compressor-pressure-gauge-0-10-0-12-0-25-bar-hydraulic-diy\"\u003eAir Compressor Pressure Gauge 0-10\/0-12\/0-25 Bar | DIY Tool\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/electromagnetic-induction-tester-coil-motherboard-fault-detector\"\u003eElectromagnetic Induction Tester – Coil \u0026amp; Circuit Fault Detector\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/360-bicycle-chain-cleaner-tool-gear-cleaning-kit\"\u003e360° Bicycle Chain Cleaner Tool | Bike Gear Cleaning Kit\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/hand-power-tools\" target=\"_blank\" rel=\"noopener\"\u003eOSHA guidance on hand and power tools\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What does the 3:1 ratio mean for this dual wall heat shrink tubing?\u003c\/h4\u003e\n\u003cp\u003eA: A 3:1 shrink ratio means the tubing can shrink down to one-third of its original inner diameter when heat is applied. For example, a tube with a 30 mm inner diameter will shrink to approximately 10 mm. This makes it ideal for applications involving irregular or large-diameter cables and connectors.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How do I apply this adhesive-lined heat shrink tubing?\u003c\/h4\u003e\n\u003cp\u003eA: Slide the tubing over the wire, cable, or connector you want to protect. Then apply uniform heat — using a heat gun or similar tool — starting at one end and moving along the tube. The outer PE layer will shrink around the cable while the inner adhesive layer melts and forms a watertight bond. Avoid using an open flame, as it can damage the tubing.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is this heat shrink tubing waterproof?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The hot-melt adhesive inner layer melts during the shrinking process and flows into any gaps, creating a moisture-resistant and watertight seal. This makes it well-suited for outdoor, marine, and automotive wiring applications where protection from water and humidity is important.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What is the inner diameter measurement, and how do I choose the right size?\u003c\/h4\u003e\n\u003cp\u003eA: All diameter sizes listed refer to the inner diameter of the tube before shrinking. Choose a size that is slightly larger than the outer diameter of the cable or connector you are covering. The 3:1 ratio gives you plenty of flexibility to accommodate a wide range of sizes within a single roll.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What does the 3:1 ratio mean for this dual wall heat shrink tubing?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"A 3:1 shrink ratio means the tubing can shrink down to one-third of its original inner diameter when heat is applied. For example, a tube with a 30 mm inner diameter will shrink to approximately 10 mm. This makes it ideal for applications involving irregular or large-diameter cables and connectors.\"}}, {\"@type\": \"Question\", \"name\": \"How do I apply this adhesive-lined heat shrink tubing?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Slide the tubing over the wire, cable, or connector you want to protect. 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Choose a size that is slightly larger than the outer diameter of the cable or connector you are covering. 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