Choosing the Right Wire Connector: Heat Shrink vs. Nylon

When it comes to making reliable electrical connections, selecting the right connector type is crucial. Factors such as environmental exposure, durability and ease of installation all play a role in determining which connector is best suited for your needs.

The most commonly used Kimball Midwest connector types are heat shrink and nylon insulated. Each offers unique advantages, so let’s compare them to help you make an informed decision.

Heat Shrink Connectors: Maximum Protection in Harsh Environments

Best for: Waterproof and corrosion-resistant connections.

Key Benefits:

• Superior Moisture Resistance – The heat shrink tubing and inner sealant create a watertight connection, protecting against corrosion.
• Reliable Electrical Crimp – The crimp connection ensures a strong electrical bond with minimal resistance.
• Versatile Applications – Ideal for both marine and automotive use, where exposure to moisture is common.
• Long-Lasting Durability – Heat shrink tubing reinforces the connection, reducing wire strain and enhancing longevity.
• Recommended for: Outdoor electrical systems, marine applications and areas prone to water exposure.

Product Example: Pro-Tech™ Nytrex

Best for: Maximum corrosion protection and long-term durability.

Key Benefits:

• Therma-Flow Sealant – Locks out corrosion by melting into place during installation, creating an airtight seal.
• Premium Heat Shrink Tubing – Provides superior resistance to abrasion, heat and chemicals compared to standard connectors.
• Faster Shrinking with NYAX Tubing – Shrinks at a lower temperature, reducing installation time by 40%.
• Clear Tubing for Easy Inspection – Allows quick size identification while ensuring a properly sealed connection.
• Recommended for: Heavy-duty automotive, industrial and machinery applications where maximum reliability is needed.

Nylon Insulated Connectors: Cost-Effective and Easy to Install

Best for: Quick, general-purpose electrical connections.

Key Benefits:

• Quick and Easy Installation – No heat application required, making these ideal for fast repairs and general electrical work.
• Flexible and Durable – The nylon insulation provides moderate protection while maintaining flexibility.
• Reliable Crimping – Features a strong mechanical hold, reducing the risk of wire pull-out.
• Cost-Effective – More affordable than heat shrink or all-weather sealed connectors.
• Recommended for: Automotive wiring, electrical panels and indoor applications where moisture resistance isn’t a primary concern.

Final Thoughts

• If you need a strong, waterproof seal, heat shrink connectors are a great choice.
  • If you want the best possible durability, corrosion protectio and long-term reliability, Pro-Tech™ Nytrex connectors are the premium solution.
• For quick and budget-friendly installations, nylon insulated connectors are a solid option.

By choosing the right connector for your needs, you’ll ensure safer, more reliable and longer-lasting electrical connections. If you have further questions on which electrical connection is best for your needs, contact your Kimball Midwest sales representative. If you do not have a rep, we can help you