WireRun Heat Shrink End Caps

Don't Forget the Ends - Protect the Whole Cable

We Guarantee to Have the Best Price

What's special about WireRun Heat Shrink Cable End Caps?

  • Insulates and seals off wire and splice terminations to protect against abrasion, moisture, chemicals, and corrosion.
  • Wide array of applications including automotive, electrical, and networking.
  • The End Cap is adhesive lined to bond with the heat shrink it overlaps.
  • Available in sizes from 3/8" to 5" in diameter to provide a fit around the cables' end.
  • Click for More Features

Just like heat shrink tubing, heat shrink end caps are perfect for situations that call for extra protection against abrasion, moisture, chemicals and corrosion. Heat shrink end caps are most commonly used to insulate and seal off wire and splice terminations in automotive, electrical and networking applications. End caps are typically used in conjunction with heat shrink tubing… heat shrink caps take over where the tubing leaves off!

Part #SizeID Before
ID After
Wall After
Length Before
Quick Ship
Quick Ship
Quick Ship
Manufacturer Direct
Quick Ship
Quick Ship
Quick Ship
Quick Ship

Heat shrink tubing is capable of sealing the entire surface of a cable or wire, but can’t be closed off at the end should that be necessary. That’s where heat shrink end caps come into play: they’re shaped to fit over the ends of wires and cables. Our heat shrink end caps are adhesive lined, so that when one is fitted over the end of a wire, it forms a bond with the heat shrink tubing that it’s overlapping. The seal is completed when heat is applied: the adhesive melts and becomes fully activated, and the end cap material shrinks to a snug and exact fit around the cable’s end.


Property Test Method Values
Operating Temperature Range n/a -67° to 230° (-55°C to 110°C)
Shrink Temperature n/a 248°F (120°C)
Tensile Strength ISO 37 14 Mpa minimum
Ultimate Elongation ISO 37 400% minimum
Specific Gravity ISO 1183 1.95 maximum
Electric Strength IEC 243 15KV/mm minimum
Corrosion(Copper Contact and Copper Mirror) ASTM D2671 no corrosion
Water Absorption ISO 62 0.5% maximum

Fluid Resistance

Lubricating Oil
Hydraulic Fluid
- Tensile Strength
- Ultimate Elongation

ISO 1817

ISO 37

8.8 MPA minimum
400% minimum

Fungus Resistance ISO 846 no fungal growth

Limiting Oxygen Index (LOI)
The ratio of how much oxygen - as compared to other gases - needs to be present in the air surrounding a particular material in order for that material to burn. The fact that Earth's normal atmospheric air contains around 21% oxygen is used a reference point when materials are classified into burn categories that are based on Limiting Oxygen Index. Substances that are combustible in air containing less than 21% oxygen are considered flammable, while those that burn in the range of anything greater than 21% but less than 28% are typically labeled "slow burning". Any material with an LOI that exceeds 28% is classified as self-extinguishing.

In the table below, you'll find a list of polymers commonly found in our heat shrink tubing and braided sleeving products, along with their LOIs and the burn categories each falls into.

ECTFE (Ethylene chlorotrifluoroethylene) Halar 64% Self Extinguishing
Nomex N/A 28% Slow Burning
Nylon 6:6 N/A Ranges fron 24-29% Slow Burning to Self Extinguishing
PET (Polyethylene Terephthalate) Mylar (film), Dacron (fiber) Ranges from 21-34% Slow Burning to Self Extinguishing
Polyethylene (PE) N/A 17% Flammable
Polypropylene (PP) polythene (in the UK) 17% Flammable
Polytetrafluoroethylene (PTFE) Teflon 95% Self Extinguishing
Polyvinyl Chloride (PVC) N/A Ranges from 45-49% Self Extinguishing


ARTICLES - A place to find educational articles covering a wide range of topics, all categorized according to your areas of interest.Learn more



Did you know that we can give you a quote for most of our products, including shipping?

You can also call us toll free 866-222-0030

Questions & Answers


Is HSEC050 RoHS compliant? - HSEC050, is it RoHS compliant?

Asked by Anonymous user on 02/20/2015 7:59 AM

  • - Thank you for your question. The HSEC050 is NOT RoHS compliant.

    Fernando M. on 05/7/2015 9:35 AM

Can you use these on playlet ropes? - I want to keep the ropes from fraying.

Asked by Anonymous user on 04/6/2015 10:20 PM

  • - Thank you for your question. This would be a perfect application for the product.

    Fernando M. on 05/7/2015 9:38 AM

Heat Shrink End Caps green - Hello I'm looking for something like HSEC0375, but green Thanks

Asked by Anonymous user on 05/7/2015 7:02 AM

  • - Thank you for your question. Unfortunately, this product is only manufactured in black and no other colors are available at this time.

    Fernando M. on 05/7/2015 9:39 AM

UL or CSA listed - Are these end caps UL or CSA listed?

Asked by Anonymous user on 10/13/2015 2:26 PM

  • - The current line of Heat Shrink End Caps are not tested to UL or CSA Standards. They do not bear the markings of either standard.

    Steve S. on 02/18/2016 11:56 AM

I am looking for a heat shrinkable End Cap (preferably polyolefin) with the following dimensions....NOMINAL LENGTH - 5.64" INTERNAL DIAMETER 2.17" MIN. EXPANDED, 0.98" MAX. RECOVERED WALL THICKNESS 0.13" NOMINAL Do you have s product? If yes, please give me your part number and ordering information

Asked by Anonymous user on 01/30/2017 10:26 AM

  • - Thank you for your question. We would welcome an opportunity to work with you to better understand your project and requirements. Please call 866-222-0030 to discuss further

    thiago t. on 01/31/2017 3:16 PM

Can this product be used on the end of a 3" conduit that has been cut just outside the entrance to a building to to keep the moisture from entering the building through the conduit that has had the conductors removed?

Asked by Anonymous user on 04/11/2017 12:00 PM

  • - Hello, Yes, although this end cap is water resistant not water proof, you can use it in your application to keep moisture out.

    andrew b. on 04/11/2017 3:03 PM

I am looking for 6" ID Heat shrink End Caps are any available

Asked by Anonymous user on 08/10/2017 10:38 AM

  • - Hello, The largest size we carry is 5" end cap

    andrew b. on 08/15/2017 9:55 AM

Are any other sizes available? I�??m looking for caps to fit 1/4�?? and1/8�?? cable

Asked by Anonymous user on 12/15/2018 2:42 PM

  • - Hello, Unfortunately those sizes aren't currently made, however check back with us because new sizes are being added frequently

    andrew b. on 12/24/2018 9:59 AM

Do you have any questions about this product?
Let our experts and customers resolve all your doubts