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4.6 Stars | 5000+ Reviews
Sale: Live for 24 Hours |
Stock: 87 Kits Left
IP67 Waterproof
Sealed Performance
Weather Resistance
In stock - Ships On Monday, May 12
Selling Fast: 43 Kits Sold In Last Hour
Free Worldwide Shipping
30 Day Money Back Guarantee
24/7 Customer Support
Enhanced Conductivity: Heavy-duty copper core ensures a strong crimp and superior conductivity.
Waterproof Durability: Insert, crimp, heat – our kit guarantees robust, waterproof connections.
One-Stop Kit for ALL wire sizes & types
Marine-grade connectors with a 3:1 shrink ratio for secure and waterproof seals.
Versatile Across Industries: Durable, stable, and corrosion-resistant
High-quality connectors that are easy to use and perfect for automotive, marine, and home electrical projects
Don’t take our word for it – see what our customers have to say!
Our insulated terminals and butt connector kit consistently receive top ratings for its heat shrink and crimp quality.
Applications
Boats
Automobiles
Home Wirings
Audio Systems
Electrical Project
Medical Device Assembly
Minimum Shrink Temp.
80°C / 176°F
Minimum Solder Melting Temp.
138°C / 280°F
Material
Dual-walled polyolefin tubing / Copper
Cable/Wire Sizes
Red:
22-16 AWG / 0.5-1.5mm2
Blue:
16-14 AWG / 1.5-2.5mm2
Yellow:
12-10 AWG / 4-6mm2
Applications
Boats
Automobiles
Home Wirings
Audio Systems
Electrical Project
Medical Device Assembly
Why Solderstick?
Quick Secure Connections
Perfect for outdoor projects, it keeps your connections safe from moisture and corrosion.
Guaranteed Weatherproof
Its innovative design ensures a secure bond every time, making your projects smooth and efficient.
Easy To Use & Saves Time
Save time and effort with connectors that simplify your tasks without compromising quality.
Enhanced Safety
Reduce burn & hazard risks to ensure a safer working environment, while being 100% safe for electronics.
Fits All Projects
From automotive repairs to home improvements, it’s the go-to solution for any wiring challenge.
Lasting Reliability
With high-quality materials and construction, it delivers reliable connections that stand the test of time.
3 Simple Steps To Seamless Wire Connections
1
Prep Your Cables
Cut wires to size and insert into the butt connector
2
Crimp
Secure the connection by crimping the butt connector onto the wires tightly.
3
Heat To Seal
Apply heat to shrink the tube around the connection.
4
Enjoy Durable Connection
Enjoy your secured and waterproof wire connection!
Efficient, Reliable, and Waterproof
Step into a new era of wiring with our Butt Connector Kit – the epitome of efficiency and reliability.
Benefit from a seamless 4-step process for connecting wires effortlessly. Our kit ensures a 3:1 shrink ratio, providing high tensile strength and unmatched reliability.
Whether you are working on automotive, marine, or home electrical projects, these connectors make wiring simple and secure. Upgrade your wiring game with our Butt Connector Kit – where efficiency meets excellence.
Recommended By
Experts, Pros & DIYers
Our products are backed and used by professionals all around the world—from those who measure every crimp and heat to those who demand quality in every terminal and wire connection.
Robby Layton
The Bearded Mechanic
Born Again Boating
Robby Layton 
343K Subscribers
The Bearded Mechanic 414K Subscribers
Born Again Boating244K Subscribers
Find Out Why 50,000 CustomersLove SolderStick
Gabriel
Verified Buyer
Using a heat gun they provided and it was super easy to slip it on, twist the wires and slip it back on to solder and seal in one swoop is wicked cool! Very happy! Gave them
William
Verified Buyer
Work excellent! Seal AND solder wires together! I just hit them for about 15 seconds with my heat gun till shrink tube shrunk then solder melted to wire leads...boom, done!
Brad
Verified Buyer
This solder sleeve works exactly how it is described & kills two birds with one stone of soldering wire as well as sealing the connection. It is a huge time-saver.
Kevin
Verified Buyer
After about 5 seconds the rubber material started to shrink. At about 9 seconds the solder started to melt & bond the wires. I gave the wires a firm tug & there were super tight.
Frequently Asked Questions
A butt connector is a commonly used crimp connector in electrical work. It safely terminates wires or connects one wire to another by inserting the wire into the connector.
There are several types of butt connectors — such as standard butt connectors, heat shrink butt connectors, solder butt connectors, and environmental sealing butt connectors. Each is designed for different applications and levels of protection.
Select the right butt connector size based on the wire gauge you are connecting. The kit includes various sizes – yellow for smaller wires, blue for medium, and red for larger ones.
Absolutely! Our butt connectors are designed for versatility, though crimping techniques may vary slightly to ensure a secure connection. Whether you're working with solid or flexible conductors, the kit ensures reliable connections.
Yes, our butt connectors are waterproof and corrosion-resistant, making them ideal for outdoor applications. Use them with confidence in various weather conditions.
Yes, Solderstick Ring Connectors are suitable for marine applications. They are designed to provide strong and reliable electrical connections.
Absolutely! The Butt Connector Kit is versatile and suitable for automotive, marine, electrical, and electronic projects. With its durability and stability, it's a perfect fit for your automotive wiring needs.
While butt connectors are generally designed for one-time use, you can carefully reopen them if needed. However, using new connectors for optimal performance and reliability in your electrical connections is recommended.
Butt connectors are generally used for low to medium-voltage applications, but insulated connectors designed for copper cables can withstand higher voltages.
Always check the connector's specifications and rating to ensure suitability for your specific voltage requirements.
Our shipping typically takes 3-5 business days in the USA and 7-10 business days in other parts of the world.
If you are not completely satisfied, we are here to make it right.
We stand behind our products with a 30-day money-back guarantee.
Plus, our customer support team is always ready to assist with any questions or concerns.
Experience our high‐quality, fully insulated butt connector kit designed with a full line of color coded sizes to measure and accept every wire with precision.
With IP67 waterproof ratings, our heat shrink, crimp, and solder color-coded technology ensures an exceptional seal and secure connection—whether you’re working on your car, home wiring, or industrial projects.
The entire line of insulated terminals and color-coded sizes means you can quickly measure and select the proper connection, ensuring every wire is...
Experience our high‐quality, fully insulated butt connector kit designed with a full line of color coded sizes to measure and accept every wire with precision.
With IP67 waterproof ratings, our heat shrink, crimp, and solder color-coded technology ensures an exceptional seal and secure connection—whether you’re working on your car, home wiring, or industrial projects.
The entire line of insulated terminals and color-coded sizes means you can quickly measure and select the proper connection, ensuring every wire is sealed for quality and durability.
Enjoy enhanced conductivity with a heavy-duty copper core that delivers quality terminals every time.
Waterproof: Secure connections that resist water and moisture, ideal for marine and outdoor applications.
Heat Shrink Tubing: Provides a tight seal and excellent insulation after heating, ensuring no loss in quality.
Solder Seal Ring: A low-temperature solder ring that melts and flows to create a solid and reliable connection.
Transparent Sleeve: Allows for visual inspection to ensure proper insertion and alignment of wires.
Color-Coded: Different sizes are color-coded for easy identification and accurate measurement.
Durable Material: Constructed from high-quality, insulated terminals and copper to resist corrosion and wear.
Easy to Use: A straightforward installation process with tools designed to crimp, heat, and solder efficiently.
Wide Range of Sizes: Accommodates various wire gauges and connection requirements, whether for a car, home, or industrial project.
Strong Crimp: Ensures wires are held firmly in place, maintaining a secure terminal connection.
Versatile Applications: Suitable for automotive, marine, industrial, and home electrical projects.
Automotive Wiring: Ideal for connecting and repairing car electrical systems using butt wire connectors, ensuring secure and durable connections in vehicles.
Marine Electronics: Provides waterproof, corrosion-resistant connections in boats and other marine environments.
Home Electrical Repairs: Ideal for household wiring projects such as fixing or extending wiring in appliances and fixtures.
Aerospace Wiring: Used in aircraft systems for reliable, high-performance electrical connections.
Industrial Equipment: Common in solar installations and other industrial applications where quality terminal connections are critical.
Solar Panel Systems: Ensures safe and dependable electrical connections in lighting and energy projects.
Lighting Installations: Suitable for both indoor and outdoor lighting projects that require a secure, insulated terminal connection.
When installing your butt connector, always start by measuring your wire gauge using our full line of color-coded insulated terminals to select the proper size.
Use high-quality crimp tools to securely attach the terminal, then apply heat to activate the heat shrink.
This heat causes the solder to flow and seal the connection, ensuring a loss-free bond whether you’re wiring a car or working on home electrical projects.
Remember, every step—from measuring to crimping and then heating—matters for achieving a quality connection.
To maintain the reliability of your butt connector, regularly inspect the insulated terminals and heat shrink tubing for any signs of wear or damage.
Keeping the connectors clean and free from debris ensures that the seal remains intact, preventing moisture ingress.
Additionally, using the right tools to measure and replace worn-out connectors means you can continue to enjoy their high performance over time.
Routine maintenance not only preserves the quality of your wiring but also minimizes the risk of failure on critical projects.
SolderStick stands out with a full line of butt connectors that combine insulated terminals, color-coded sizes, and advanced heat shrink technology.
Our product is engineered to crimp, solder, and shrink in a single seamless process, making it easy to measure and accept any wire type.
Thanks to our innovative design and high-quality tools, you can link your wiring projects with confidence and continue to experience excellent performance every time.
Here are some more SolderStick products you can check out:
T-Tap Wire Connectors | Waterproof Wire Connectors | Heat Guns for Soldering | Wire Nut Kits | Wire Connectors | Butt Connectors | Ring Terminals | LED Connector | Wire Crimping Tool | Wire Eyelet Connectors | Fork Connector Kit | Spade Connectors | Copper Cable Lug | Push-In Terminal Block Wire Connector | Piggyback Space Connector Kit | Colored Heat Shrink Tubing | Bullet Wire Connector | Ferrule Connector Kit
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