{"product_id":"3-1-dual-wall-adhesive-heat-shrink-tubing-1m-1-6mm-30mm-cable-sleeve","title":"3:1 Dual-Wall Adhesive Heat Shrink Tubing 1M | 1.6–30mm","description":"\n\u003ch2\u003e3:1 Dual-Wall Adhesive Lined Heat Shrink Tubing – 1 Metre\u003c\/h2\u003e\n\u003cp\u003eGet professional-grade waterproof insulation and cable protection with this \u003cstrong\u003e3:1 dual-wall heat shrink tubing\u003c\/strong\u003e. The inner adhesive (glue-lined) layer bonds tightly to plastic, rubber, and metal surfaces, creating a moisture-resistant, airtight seal — perfect for electrical wiring, cable splices, connector protection, and marine or automotive applications.\u003c\/p\u003e\n\u003cp\u003eAvailable in a wide range of diameters from \u003cstrong\u003e1.6 mm to 30 mm\u003c\/strong\u003e, this 1-metre length suits everything from fine wire to large cable bundles. Made in China from high-quality PE material and CE certified.\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 – Ideal for irregular shapes, connectors, and tapered components; provides a snug, secure fit\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual-Wall Construction\u003c\/strong\u003e – Outer PE wall for mechanical protection; inner hot-melt adhesive layer for a waterproof, airtight seal\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Diameter Range\u003c\/strong\u003e – Available from 1.6 mm up to 30 mm to cover thin wires and thick cable bundles alike\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCE Certified\u003c\/strong\u003e – Meets European conformity standards for safety and quality\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAdhesive Bonds to Multiple Surfaces\u003c\/strong\u003e – Sticks securely to plastic, rubber, and metal for a long-lasting, corrosion-resistant connection\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Operating Temperature\u003c\/strong\u003e – Rated from -40 °C to +125 °C, suitable for harsh environments\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMedium Wall Thickness\u003c\/strong\u003e – Balances flexibility with enhanced mechanical protection strength\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\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePolyethylene (PE)\u003c\/td\u003e\n\u003c\/tr\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\u003eDiameter Range\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\u003eLength\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 Metre per piece\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInitial Contraction Temp\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 Temp\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 Temp\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 Temp 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\u003eColour\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBlack\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\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMade in China\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 cable splices and wire harness protection\u003c\/li\u003e\n  \u003cli\u003eConnector and terminal sealing\u003c\/li\u003e\n  \u003cli\u003eMarine, automotive, and outdoor wiring\u003c\/li\u003e\n  \u003cli\u003eCorrosion protection for metal joints and terminals\u003c\/li\u003e\n  \u003cli\u003eMechanical strain relief on cables and leads\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\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\/eye-face-protection\" target=\"_blank\" rel=\"noopener\"\u003eOSHA on eye and face protection\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What does \"3:1 shrink ratio\" mean for dual-wall heat shrink tubing?\u003c\/h4\u003e\n\u003cp\u003eA: A 3:1 shrink ratio means the tubing will shrink down to one-third of its original inner diameter when heat is applied. For example, a 30 mm diameter tube will shrink to approximately 10 mm. This larger ratio makes the tubing ideal for irregular shapes, stepped connectors, and tapered cable ends where standard 2:1 tubing would not conform properly.\u003c\/p\u003e\n\u003ch4\u003eQ: How do I apply this adhesive-lined heat shrink tubing?\u003c\/h4\u003e\n\u003cp\u003eA: Slide the correct diameter of tubing over your cable or connection, then apply even heat using a heat gun, starting from the centre and working outward. At around 70 °C the tubing begins to contract; at 125 °C full shrinkage is achieved. The inner adhesive layer melts and flows to fill gaps, creating a waterproof, airtight seal. Avoid using an open flame as it can cause uneven shrinking or damage.\u003c\/p\u003e\n\u003ch4\u003eQ: Is the diameter listed the inner diameter before or after shrinking?\u003c\/h4\u003e\n\u003cp\u003eA: The listed diameter refers to the \u003cstrong\u003einner diameter before shrinking\u003c\/strong\u003e. Always choose a size slightly larger than the cable or connector you want to cover, so the tubing slides on easily before heat is applied.\u003c\/p\u003e\n\u003ch4\u003eQ: Can this dual-wall heat shrink tubing be used outdoors or in marine environments?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The inner adhesive lining creates a moisture-resistant, waterproof seal that is well suited for outdoor, marine, and automotive wiring. The wide operating temperature range of -40 °C to +125 °C also makes it reliable in both cold and high-temperature environments.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What does \\\"3:1 shrink ratio\\\" mean for dual-wall heat shrink tubing?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"A 3:1 shrink ratio means the tubing will shrink down to one-third of its original inner diameter when heat is applied. For example, a 30 mm diameter tube will shrink to approximately 10 mm. This larger ratio makes the tubing ideal for irregular shapes, stepped connectors, and tapered cable ends where standard 2:1 tubing would not conform properly.\"}}, {\"@type\": \"Question\", \"name\": \"How do I apply this adhesive-lined heat shrink tubing?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Slide the correct diameter of tubing over your cable or connection, then apply even heat using a heat gun, starting from the centre and working outward. At around 70 °C the tubing begins to contract; at 125 °C full shrinkage is achieved. The inner adhesive layer melts and flows to fill gaps, creating a waterproof, airtight seal. 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