5M 4:1 Heat Shrink Tube With Glue Thermoretractile Shrinkable Tubing Dual Wall 4 6 8 12 16 18 20mm

Heat shrink tubing with glue provides a robust seal for electrical connections. Azabooti offers a 5M 4:1 heat shrink tube with internal adhesive for durable, weatherproof insulation.

Seal your electrical connections with confidence and keep moisture, dust, and abrasion out of the way. This 5M 4:1 heat shrink tube with internal glue delivers a robust, dual-wall solution that forms a tight, weatherproof seal around wires and cables. When heated, the outer sleeve shrinks to snugly fit your kit, while the inner adhesive layer melts to create an impermeable bond that guards against moisture ingress and corrosion. It’s ideal for automotive, marine, electronics, and DIY projects where durable insulation and strain relief are critical.

Key benefits include a strong, one-piece seal around bundled wires, reduced risk of short circuits, and improved durability in harsh environments. The dual-wall design provides mechanical protection with the added security of internal glue that activates during shrinking, forming a secure bond to the underlying cable and leaving you with a professional-grade finish.

Brand: JOTTA | Material: PE with internal glue | Type: Heat Shrinkable | Customizable option: Yes | Diameter options: 4–20 mm (various sizes shown in product images) | Length: 5 meters

What you get is a versatile heat-shrink solution designed for clean, professional results. Its shrink ratio of 4:1 means a single tube can shrink to a quarter of its original diameter, enabling you to cover even multiple-wire harnesses efficiently. The internal adhesive ensures a tight seal that resists water, oils, and environmental contaminants, making it suitable for outdoor, automotive, and industrial use. This product is non-toxic and designed for general-purpose electrical insulation and cable protection.

Usage notes: Select the appropriate diameter for your cable bundle, measure the outer insulation, and choose a slightly larger size to allow for heat shrinking. Use a heat gun or appropriate heating device to uniformly apply heat around the sleeve until it fully shrinks and the inner glue flows to fill gaps. Allow to cool before handling. For best results, clean the surface and ensure there is no moisture on the area to be sealed prior to shrinking.

Compatibility tips: This heat shrink tube works well with typical automotive wiring, household electronics, and hobby projects. The internal glue provides an extra layer of moisture resistance for connectors and splices, helping to extend the life of your wiring system in challenging environments.

Care and storage: Store in a cool, dry place away from direct sunlight to prevent material degradation. When not in use, coil any unused length and keep away from sharp objects that could nick or damage the tube surfaces.

Features

• Shrinks to fit 4 to 1 ratio
• Provides moisture seal with internal glue
• Weatherproof protection for cables
• Dual-wall design for mechanical strength
• Ideal for automotive and electronics projects
• Long 5 meter length for versatility
• Glue inside activates on shrinking

Specifications

• Materials: polyethylene outer, internal adhesive glue, heat shrinkable tubing

Frequently Asked Questions

What sizes does the heat shrink tube cover?

This tubing covers 4 to 1 shrink ratio with diameters from 4 mm to 20 mm. The 5 meter length gives ample material for multiple connections.

Is the glue inside active during shrinking?

Yes, the internal adhesive melts during heating to form an impermeable bond. This seals against moisture, dust, and corrosion.

Can this be used for DIY electronics and automotive projects?

Absolutely. The dual-wall, weatherproof design protects wires and provides strain relief in electronics and automotive applications. It’s suitable for DIY gifts and professional builds.