{"product_id":"3-1-adhesive-glue-lined-heat-shrink-tubing-2-4mm","title":"3:1 Adhesive Glue Lined Heat Shrink Tubing — 2.4mm ID, 50m Roll, 6 Colors","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003e3:1 Adhesive Glue Lined Heat Shrink Tubing — Waterproof Dual-Wall Protection for Wiring You Can't Afford to Lose\u003c\/h2\u003e\n\u003cp\u003eWhether you're chasing an electrical gremlin in a boat bilge, weatherproofing a trailer harness, or tidying up a custom electronics build, a failed splice or corroded connection can cost hours of troubleshooting. Electricians, automotive technicians, marine riggers, and serious DIYers need a heat shrink solution that does more than just cover a wire — it needs to seal it completely against moisture, vibration, and mechanical stress.\u003c\/p\u003e\n\u003cp\u003eEach roll contains 50 meters (≈164 ft) of dual-wall adhesive heat shrink tubing with a 2.4mm (≈3\/32\") inner diameter and a 3:1 shrink ratio. The outer polyolefin jacket shrinks down to approximately one-third of its original diameter, while the inner hot-melt adhesive layer flows and bonds to create a watertight, strain-relieving seal. Available in six colors — red, black, yellow, white, blue, and green — for easy circuit identification and color-coded wiring organization.\u003c\/p\u003e\n\u003cp\u003eThis tubing is well suited for automotive wiring harness repair, marine electrical connections, outdoor junction waterproofing, and small-gauge wire insulation in electronics projects. The 50m roll length makes it practical for production runs, fleet maintenance, or keeping a full-color set on the bench for any job that comes in.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e🔌\u003c\/span\u003e \u003cstrong\u003eCompatibility:\u003c\/strong\u003e Fits wire and connector diameters up to 2.4mm (≈3\/32\") before shrink. Recovered inner diameter is typically ~0.8mm. Compatible with standard heat guns; suitable for polyolefin-compatible substrates including copper wire, solder joints, and most connector bodies.\u003c\/div\u003e\n\u003ch2\u003e✅ Key Features of These 3:1 Adhesive Glue Lined 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\u003eWaterproof Dual-Wall Construction\u003c\/strong\u003e — The inner hot-melt adhesive layer melts during shrinking and flows around the substrate, creating a watertight seal that blocks moisture ingress in marine, outdoor, and underground wiring applications.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e \u003cspan\u003e\u003cstrong\u003e3:1 Shrink Ratio for Irregular Shapes\u003c\/strong\u003e — A wider shrink range than standard 2:1 tubing means this adhesive heat shrink tubing conforms tightly to connectors, solder joints, and tapered surfaces that a 2:1 tube would bridge over.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎨\u003c\/span\u003e \u003cspan\u003e\u003cstrong\u003e6-Color Set for Circuit Identification\u003c\/strong\u003e — Red, black, yellow, white, blue, and green options let you color-code wiring harnesses, follow automotive or marine wiring standards, and eliminate guesswork during future repairs.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e \u003cspan\u003e\u003cstrong\u003e50-Meter Roll — Workshop-Ready Quantity\u003c\/strong\u003e — At 50m (≈164 ft) per roll, there's enough tubing for production wiring runs, fleet vehicle maintenance, or stocking a full-color selection without running short mid-project.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔥\u003c\/span\u003e \u003cspan\u003e\u003cstrong\u003eConsistent Shrink with Standard Heat Guns\u003c\/strong\u003e — Activates reliably with any variable-temperature heat gun; no open flame required. The controlled shrink process reduces the risk of damaging adjacent components or insulation.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚡\u003c\/span\u003e \u003cspan\u003e\u003cstrong\u003eStrain Relief at the Seal Point\u003c\/strong\u003e — The bonded adhesive layer adds mechanical reinforcement at splices and terminations, reducing flex fatigue on small-gauge wires in high-vibration environments like engine bays and trailer connections.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e📐 Technical Specifications — Dual-Wall Adhesive 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\u003eDual-Wall Adhesive Glue Lined Heat Shrink Tubing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eShrink Ratio\u003c\/th\u003e\n\u003ctd\u003e3:1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInner Diameter (Before Shrink)\u003c\/th\u003e\n\u003ctd\u003e2.4mm (≈3\/32\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRecovered Inner Diameter (After Shrink)\u003c\/th\u003e\n\u003ctd\u003eTypically ~0.8mm (≈1\/32\") — see variant options to confirm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRoll Length\u003c\/th\u003e\n\u003ctd\u003e50m (≈164 ft)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOuter Jacket Material\u003c\/th\u003e\n\u003ctd\u003ePolyolefin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInner Adhesive Layer\u003c\/th\u003e\n\u003ctd\u003eHot-melt adhesive (glue lined)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Colors\u003c\/th\u003e\n\u003ctd\u003eRed, Black, Yellow, White, Blue, Green\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eShrink Temperature (Activation)\u003c\/th\u003e\n\u003ctd\u003eTypically 70–90°C (158–194°F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFull Shrink \/ Adhesive Flow Temperature\u003c\/th\u003e\n\u003ctd\u003eTypically 120–150°C (248–302°F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSuitable Wire Gauge Range\u003c\/th\u003e\n\u003ctd\u003eGenerally AWG 20–26 (contact us to confirm for your application)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eApplication Tool\u003c\/th\u003e\n\u003ctd\u003eHeat gun (recommended); open flame with caution\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWaterproof \/ Moisture Seal\u003c\/th\u003e\n\u003ctd\u003eYes — adhesive inner lining creates watertight bond\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOutdoor \/ Marine Suitability\u003c\/th\u003e\n\u003ctd\u003eYes — verify UV and chemical resistance for specific environments\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCompliance \/ Standards\u003c\/th\u003e\n\u003ctd\u003eContact us to confirm\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 Note:\u003c\/strong\u003e Recovered diameter and exact temperature ratings may vary by production batch. If your application has tight tolerances, contact us before ordering to confirm current specifications.\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 inner diameter for my application?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eSelect a tube whose recovered (post-shrink) inner diameter is slightly smaller than the cable or connector you need to seal. For this 2.4mm ID tube with a 3:1 shrink ratio, the recovered diameter is typically around 0.8mm. Measure your wire or connector diameter before ordering, and size up if you need to slide the tubing over a connector body first. As a general rule: the pre-shrink ID should be at least 10–20% larger than the object you're covering for easy installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat does the '3:1 shrink ratio' mean in practice?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eA 3:1 ratio means the tubing shrinks to approximately one-third of its original diameter when heat is applied. For example, a 2.4mm ID tube recovers to roughly 0.8mm. This wider shrink range makes it suitable for irregular shapes, connectors, and splices where a standard 2:1 tube would not conform tightly enough — particularly useful for tapered connector boots and stepped wire bundles.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow strong is the adhesive seal, and will it hold under vibration?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe inner glue lining melts and flows during shrinking, creating a mechanical bond around the substrate. This adhesive layer generally provides a watertight, strain-relief seal that holds up well under vibration — making it a common choice for automotive wiring harnesses, marine electrical connections, and trailer wiring where flex fatigue is a concern. For extreme vibration environments (e.g., off-road or heavy equipment), additional mechanical strain relief at the connector is still recommended.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs this tubing suitable for outdoor, marine, or underground use?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. The dual-wall construction with an adhesive inner lining creates a waterproof barrier that resists moisture ingress, making it generally suitable for outdoor, marine, and direct-burial applications. For prolonged saltwater immersion or exposure to fuels and solvents, we recommend verifying the specific chemical resistance ratings for your environment. Contact us if you need documentation for a specific use case.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat temperature do I need, and can I use a heat gun I already own?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eDual-wall adhesive heat shrink tubing typically begins activating at around 70–90°C (158–194°F) and fully shrinks with adhesive flow at approximately 120–150°C (248–302°F). Any variable-temperature heat gun set to medium-high is generally sufficient. Keep the gun moving to avoid scorching. Open flames (lighters, butane torches) can work in a pinch but increase the risk of uneven shrink or jacket damage — a heat gun gives more consistent results.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat wire gauges or connector sizes does 2.4mm ID fit?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eA 2.4mm inner diameter is generally suited for small-gauge wiring, typically in the range of AWG 20–26 or equivalent metric wire sizes (approximately 0.5–0.8mm² cross-section). It is commonly used for individual wire insulation, small solder joints, and pin connectors. For larger wire bundles, multi-conductor cables, or larger connector bodies, consider a larger ID size. If you're unsure, measure the outer diameter of your wire or connector and compare to the 2.4mm pre-shrink ID.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDoes the color affect performance, or is it purely for identification?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eColor is primarily for identification and organization — for example, using red for positive leads and black for negative in automotive or electronics wiring, or following IEC\/NEC color coding standards for phase identification. All six color options (red, black, yellow, white, blue, green) share the same adhesive dual-wall construction and performance characteristics. There is no difference in shrink ratio, adhesive strength, or temperature rating between colors.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your color and length above, then add to cart — ships from our US warehouse.\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HomeDIYer","offers":[{"title":"red, black, yellow, white, blue, green \/ 2.4mm \/ 50m","offer_id":52329461350674,"sku":"GLFBZWYGLFBZWYDZ00018x1","price":156.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture3of9_1f683126-1bcf-4217-a511-6e2a33e37f27.jpg?v=1780500608","url":"https:\/\/homediyer.com\/de\/products\/3-1-adhesive-glue-lined-heat-shrink-tubing-2-4mm","provider":"HomeDIYer","version":"1.0","type":"link"}