Heat Shrink Tubing: When Extra Protection is Needed

Posted on 12/31/18 7:42 AM


While heat shrink tubing can be used for many different applications, it is ideal for use where extra protection is needed, such as sealing out moisture, mechanical protection, or relief of strain on joints. 


Heat shrink tubing is shrinkable, plastic tubes that can be used to insulate wires, provide abrasion resistance, and environmental protection for stranded and solid wire conductors, connections, joints, and terminals. Typical applications are as diverse as component covering, moisture resistance, mechanical protection, shock protection, abrasion protection, corrosion protection, insulation, dust proofing, splicing, cable binding and tying, strain relief, marking, and coding.

Materials and Sizes

Heat shrinkable products are comprised of different plastic resins which allow the tubing to shrink to size. Made with a variety of materials and sizes, heat shrinkable products have perfect plastic memory. They are supplied in an expanded condition. Upon the application of a heat source, the tubing shrinks and grasps tightly to the object over which it has been placed.

Interpower heat shrink tubing is available in a 2:1 ratio. This ratio is the size of the original tubing to its smallest shrunken size. A piece of tubing that has a 2:1 ratio will decrease by half. For example, ½-inch in the original size will shrink down to ¼-inch.


The colors available for Interpower heat shrink tubing include: black, green-yellow, white, red, blue, yellow, green, brown, and transparent. The flammability rating is VW-1 with a temperature rating of -55°C to 135°C. Sizes available include 3/64" up to 1/2".

Additional Resources

See the complete line of heat shrink tubing available at Interpower. In addition to heat shrink tubing, there are a variety of value-added services available including specific length cable, made-to-order assemblies, and specialized labeling and packaging.  Interpower offers a 1-week U.S. manufacturing lead-time on non-stock Interpower products, same day shipping on in-stock products, and blanket or scheduled orders on all Interpower products.

If you have questions, Interpower offers free technical support. For further assistance, please see Interpower’s contact information below.

Topics: electrical safety, product design, heat shrink tubing

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