Heat Shrink Tubing - 20mm Diameter - Black - 1M
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Product Information
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This 20mm diameter black heat shrink tubing is designed for electrical technicians, DIY enthusiasts, and hobbyists who require a reliable solution for cable insulation, harness protection, and terminal bonding. Its primary benefit lies in its low shrink temperature and thin-wall construction, which allows for fast, efficient application without exposing sensitive components to excessive heat; however, users should note that the 20mm width is a static size and requires careful measurement of the target object to ensure a proper fit before shrinking.
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Extended Product Information
FAQs
Can I use a hair dryer instead of a heat gun?
A standard hair dryer usually does not reach the necessary temperature to activate the tubing effectively. A dedicated heat gun is strongly recommended.
Is this tubing waterproof?
While it provides a moisture-resistant seal, this specific model is thin-walled and not designed for underwater or high-pressure fluid submersion.
What is the length of this product?
This package includes 1 meter of heat shrink tubing.
Can this be used for outdoor wiring?
Yes, it provides good protection against environmental elements, but ensure the connection is properly sealed and protected from direct UV exposure if possible.
Does the tubing shrink in length as well as width?
All heat shrink tubing experiences some longitudinal change (shrinkage in length) during the heating process. It is best to cut the tube slightly longer than needed and trim the excess after it has cooled.
Troubleshooting
Tubing is loose after heating
Ensure the diameter of the tubing is appropriate for the cable size; if the object is too small, the tubing cannot shrink enough to grip it tightly.
Tubing appears scorched or discolored
The heat source was applied too closely or held in one spot for too long; keep the heat gun moving and maintain a consistent distance.
Tubing won't slide over the cable
Check for sharp burrs on the connector or cable end that may be catching on the inside of the tube; file down rough edges before attempting to slide the tubing on.
Pros and Cons
Pros
- Low shrink temperature prevents thermal damage
- Excellent for bundling wires and protecting connectors
- Provides reliable corrosion resistance
- Easy to cut to exact length requirements
- Professional black finish for clean cable management
Cons
- Fixed 20mm diameter may not fit all cable gauges
- Requires a heat gun or high-heat source for activation
- Not intended for high-voltage industrial insulation applications
Setup, Compatibility & Care
To use the tubing, first measure the diameter of your wire or object to ensure it is smaller than 20mm, as the tubing must slide over the object easily. Cut the desired length using sharp utility shears. Position the tubing over the area you wish to protect and apply uniform heat using a heat gun, moving it continuously to prevent hot spots. Do not use an open flame directly, as this may scorch or unevenly shrink the material. Once shrunk, allow the material to cool completely before handling to ensure the bond has solidified.