Wire End Caps

End Caps Characteristics & Specifications

2:1 Shrink Ratio

Our wire caps are manufactured with a shrink ratio of 2:1, guaranteeing a snug fit around cut cable ends to ensure maximum protection against moisture and other warehouse elements.

Cracking Resistance

The superior flexibility of our end caps allows them to conform effortlessly to various cable shapes and sizes. They’re engineered to withstand environmental stress and resist developing cracks.

Abrasion Resistance

Our end caps provide a robust environmental defense for cables, protecting them from abrasions and other potential hazards. This enhances the longevity of your wires and cables.

EVA Adhesive

All of our heat shrink end caps are equipped with an EVA adhesive lining, which means you can count on a great fit every time. The minimum shrink temperature starts at 176ºF.

UV Resistant

Our Heat Shrink End Caps are made with elastic compounds that are resistant to UV light and can withstand long-term exposure to sunlight in yard storage applications—without fear of cracking or seal failure.


We offer end caps in standard solid black. End caps with valves are available upon request.

Our Range of Wire End Caps

Every wire manufacturing or electrical distribution facility needs cable caps that workers can depend on. At Rainbow Rubber & Plastics, we take pride in providing high-quality manufacturing solutions to meet the unique needs of customers like you. Our tried-and-true cable caps manufacturing solutions have been answering the needs of all types of businesses for years. We can help you with: 

  • Heat shrink end caps
  • Twist cable caps
  • Custom wire end caps

Our wire end caps are a vital component in cable management across multiple applications.

Product Detail

Heat shrink end caps are an essential component in the cable industry. They’re designed to protect cable ends from moisture, dust, and other environmental factors. These end caps are commonly used in various applications, like warehousing, packaging, and yard storage.

How to Use Wire Caps

Our injection-molded wire caps are meant to be easily applied to the cut ends of wires. Simply slide the cable cap over the cable end and apply heat using a heat gun. Then, watch the end caps shrink around the cable, creating a tight seal. For more information, read our guide to proper usage.

Manufacturing Process

With over 50 years of experience, you can count on Rainbow Rubber & Plastics to adhere to high-quality standards during the wire cap manufacturing process. We’re proud to provide a cable cap that will stand the test of time.

The Rainbow Rubber & Plastics Difference

We’re known nationwide for our conveyor belt solutions, but that’s not the only reason why our customers keep coming back to Rainbow Rubber & Plastics.

At our core, we take pride in being a leading rubber company that’s known for forging lasting relationships across industries. Our expertise has earned us a reputation as a reliable partner in the wire and cable industry. When you need heat shrink caps, you can rely on our team to deliver exceptional quality and customer satisfaction.