---
product_id: 142199100
title: "Kuject 160PCS Solder Seal Wire Connectors Kit, Waterproof Solderless Heat Shrink Butt Terminal Insulated Electrical Butt Splice for Automotive Marine Boat Wire Joint"
brand: "kuject"
price: "$30.95"
currency: USD
in_stock: true
reviews_count: 13
category: "Kuject"
url: https://www.desertcart.us/products/142199100-kuject-160pcs-solder-seal-wire-connectors-kit-waterproof-solderless-heat
store_origin: US
region: United States of America
---

# 12V max voltage - reliable power Waterproof with dual adhesive rings Heat shrink seals in seconds Kuject 160PCS Solder Seal Wire Connectors Kit, Waterproof Solderless Heat Shrink Butt Terminal Insulated Electrical Butt Splice for Automotive Marine Boat Wire Joint

**Brand:** kuject
**Price:** $30.95
**Availability:** ✅ In Stock

## Summary

> 🔥 Seal it fast, wire it right — never worry about your connections again!

## Quick Answers

- **What is this?** Kuject 160PCS Solder Seal Wire Connectors Kit, Waterproof Solderless Heat Shrink Butt Terminal Insulated Electrical Butt Splice for Automotive Marine Boat Wire Joint by kuject
- **How much does it cost?** $30.95 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/142199100-kuject-160pcs-solder-seal-wire-connectors-kit-waterproof-solderless-heat)

## Best For

- kuject enthusiasts

## Why This Product

- Trusted kuject brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **All-in-One 160PCS Kit:** Comprehensive set with multiple colors and sizes to tackle any wiring challenge.
- • **Certified Automotive Grade:** Meets IATF16949:2016 standards—trusted by pros for vehicle repairs.
- • **Flexible Fit for Tight Spots:** Bendable connectors perfect for cramped automotive or marine wiring jobs.
- • **Solderless Speed, Pro Results:** Skip the mess—just heat and seal for flawless connections in minutes.
- • **Waterproof Seal, No Corrosion:** Dual hot-melt adhesive rings lock out moisture for long-lasting durability.

## Overview

The Kuject 160PCS Solder Seal Wire Connectors Kit offers a professional-grade, solderless solution for automotive, marine, and electrical wiring. Featuring heat-shrink technology with dual waterproof adhesive rings, these connectors provide quick, flexible, and corrosion-resistant splices rated for 12V DC and temperatures up to 150°C. Certified to IATF16949:2016 standards, this kit includes 160 insulated copper butt terminals in multiple colors, designed to simplify complex wiring tasks while ensuring durable, reliable connections in confined spaces.

## Description

desertcart.com: Kuject 160PCS Solder Seal Wire Connectors Kit, Waterproof Solderless Heat Shrink Butt Terminal Insulated Electrical Butt Splice for Automotive Marine Boat Wire Joint : Industrial & Scientific

Review: These Connectors Make Wiring a Breeze — Reliable and Easy! - I picked up the Kuject Solder Seal Heat Shrink Butt Connectors for some wiring projects, and honestly, they’ve made my life way easier. If you’ve ever struggled with messy connections or worrying about durability, these will be your new best friend. The best part? The solder ring inside melts perfectly when heated, creating a strong, clean connection without needing extra tools or messy soldering. Plus, the heat shrink sleeve seals everything tight and waterproof, which gives me confidence that my connections won’t fail even in tough conditions. I tested these on my car’s wiring and some home electronics, and every joint has held up great — no corrosion, no loosening, just solid connections. They’re also super easy to use, even if you’re not a pro. With 200 pieces, I have plenty to keep me stocked for future projects. Overall, I’m really happy with the quality and performance of these connectors — they definitely take the headache out of wiring jobs.
Review: Saved me from a $1600 car repair! - TL;DR - the auto shop wanted $1600 for parts and labor. Between these, some parts, and a heat gun, my car runs better than it has in a couple years. Backstory: I have a 2013 Hyundai Veloster Turbo and the last couple of years coils and spark plugs have been going pretty fast. I figured it was something with the ignition wiring or something else electric. The shop I've used regularly quoted me $1600 for new spark plugs, coils, and a wiring harness (all they would use were coils direct from Hyundai for $970!) plus labor. For a 12 year old car that's worth less than $3k I said no way, especially giving Hyundai that much for parts. I bought these guys, a set of coils and spark plugs from desertcart, a heat gun, wire cutter, and electrical cloth tape for about $70. With the heat gun, they worked great. The solder doesn't melt quite how you'd expect, but it does turn into a softer blob and may leak slightly silver - takes a minute or two after you focus the heat there with a narrow nozzle. Make sure the wires are good and jammed or twisted in the middle of the sleeve! I made the mistake initially of not having them touching too well before using the connector and had to redo - luckily they come off fairly easily with heat and wire stripper if needed. All in all, very pleased and having zero issues so far! They shrunk well, connections are solid, and I know the wires will be better protected from humidity and heat.

## Features

- Time Saver: Solderless,crimpless, all you need is just a heat gun to finish the joint, much faster and easier than the old way
- Fit for Confined and Narrow Spaces: Can be bent after connection and no need to crimp or solder in the confined area, just control the temperature via a heat gun
- Waterproof and Seal Performance: There is two hot melt waterproof adhesive rings in each butt connector, which help it hold up better to moisture
- High Temperature Proof in A Short Time: Use exclusive material in the butt connectors to avoid shrink tubing melting before solder ring
- IATF16949:2016 Listed: The Kuject solder seal connectors meet the newest standard of International Automotive Task Force, which is the most standardized way for you to repair or modify your car

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07T1HYJ9G |
| Best Sellers Rank | #376 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Butt Terminals |
| Brand | Kuject |
| Color | RED BLUE YELLOW WHITE |
| Connector Gender | Male |
| Connector Type | Solder |
| Contact Material | Copper |
| Date First Available | June 13, 2019 |
| Insulation Material | Polyolefin |
| Item Weight | 4.5 ounces |
| Item model number | WT160 |
| Manufacturer | Kuject |
| Material | Copper |
| Maximum Voltage | 12 Volts (DC) |
| Number of Items | 160 |
| Product Dimensions | 8.07"L x 4.33"W x 0.71"H |
| Specification Met | Iatf16949:2016 |
| Temperature Rating | 80 to 150 C |
| Terminal | Butt Terminal |
| Unit Count | 1 Count |

## Product Details

- **Color:** RED BLUE YELLOW WHITE
- **Connector Type:** Solder
- **Contact Material:** Copper
- **Insulation Material:** Polyolefin
- **Terminal:** Butt Terminal

## Images

![Kuject 160PCS Solder Seal Wire Connectors Kit, Waterproof Solderless Heat Shrink Butt Terminal Insulated Electrical Butt Splice for Automotive Marine Boat Wire Joint - Image 1](https://m.media-amazon.com/images/I/81POFh9RMjL.jpg)

## Available Options

This product comes in different **Number Of Items** options.

## Questions & Answers

**Q: are wire connectors the same thing as butt connectors?**
A: Dear Customer, 
These are solder seal wire connectors, rather than butt connectors. This is the heat shrink butt connector here: https://www.amazon.com/dp/B07B518GCJ. You can check they are difference via the link above.

For let you know their difference eaiser, we compare these two kinds of connectors from 4 aspects as follow: 

1. Simplicity of Operation. For joining the wire with heat shirnk butts, you need a heat gun and plier, but for the solder seal coneecotrs, you just need a heat gun, as there is no need to crimp. So, the solder seal connector will be easier to use. 
2. Waterproof Resistance. Both of them are waterproof, but there are two hot melt waterproof adhesive rings in the solder seal connectors, which will make it get a better waterproof and seal performance. 
3. Flexibility of Use in The Confined Space. The solder seal connectors can be bent after connection and just need a heat gun to control the temperature to finish the joint, so it is more flexable and eaier when joining wire in the confined space. 
4. Price. On Kuject, 210Pcs heat shrink butts is $19.99 ($1 for 10 piece) , and 120Pcs solder seal wire connectors is $16.99($1.42 for 10 piece) . The price is cheaper for every piece of the heat shrink butt connectors. 

In conclusion,  the solder seal connectors have a better performance than the heat shrink butts although it is a little expensive. So, we will recommend to use the solder seal connectors in most case, but it still depend on your needs. 

Besides, there are two kinds of butt connectors in the market: crimp butt connector & heat shrink butt connector. Maybe you refer to the crimp butts, so we also talk about the crimp butt connector here. The appearance of crimp butt is almost same as the heat shrink butt, but the tube outside of crimp butt connector is made by nylon, so they can not be heat shrinked and not waterproof, which can not be used outdoor or humid area, just only can use indoor and dry space. 

These are the introduction of the three type of connectors above, hope our answer help you.

Best wishes, 
Kuject customer serivce team

**Q: Photo w/ all the connectors lying outside the box shows about 25 of 12/10 connectors but the box/label shows only 10 are provided - which is correct?**
A: There are only 10, the first photo of 25 is dishonest.

**Q: Are these connectors UL listed?**
A: What is UL certified mean?-UL Certified. A certificate, issued to a manufacturer for one of its products, which indicates that the product has been tested in the US by the Underwriters Laboratories, Inc. (UL) and has met UL requirements.

What you should know about UL certification?-UL Certification means that a product has undergone rigorous testing to ensure its safety standards are up-to-date. UL provides a number of services for a business—including validating, testing, inspecting, auditing, and certifying products and various businesses around the world.

What is the cost to be UL Certified?-The fee, paid to UL, is often in the range between US$5,000 to 15,000. Then again, this is for he services provided by UL, and not including product development costs.
China Imports -UL (Underwriter Laboratories) develops electronics safety standards for the United States, and provide related testing, certification and auditing services.- Unlike the EU, where importers must comply with a set of harmonized electronics safety standards – American electronics importers are free to choose which standards to comply with.-UL standards are developed for specific electronic products, or components, such as cords, batteries and plugs.

**Q: I need to join wires when installing the new radio for my car, is it safe and reliable for using these kind of self-solder wire connectors?**
A: Dear Customer,

Our item is IATF16949:2016 Listed, this is a certification of International Automotive Task Force. Automobile company like Ford, General Motors and Chrysler Corporation require that only product which go through the certification IATF16949:2016 can be used as parts to repair their cars, so you can use our connectors at ease.

Besides, compare to the tradition method that wiring with the solder iron, using our self-solder wire connectors will be much faster and easier, all you need is just a heat gun to heat the connectors.

Best wishes,
Kuject customer service team

## Customer Reviews

### ⭐⭐⭐⭐⭐ These Connectors Make Wiring a Breeze — Reliable and Easy!
*by B***. on June 25, 2025*

I picked up the Kuject Solder Seal Heat Shrink Butt Connectors for some wiring projects, and honestly, they’ve made my life way easier. If you’ve ever struggled with messy connections or worrying about durability, these will be your new best friend. The best part? The solder ring inside melts perfectly when heated, creating a strong, clean connection without needing extra tools or messy soldering. Plus, the heat shrink sleeve seals everything tight and waterproof, which gives me confidence that my connections won’t fail even in tough conditions. I tested these on my car’s wiring and some home electronics, and every joint has held up great — no corrosion, no loosening, just solid connections. They’re also super easy to use, even if you’re not a pro. With 200 pieces, I have plenty to keep me stocked for future projects. Overall, I’m really happy with the quality and performance of these connectors — they definitely take the headache out of wiring jobs.

### ⭐⭐⭐⭐⭐ Saved me from a $1600 car repair!
*by L***I on December 14, 2025*

TL;DR - the auto shop wanted $1600 for parts and labor. Between these, some parts, and a heat gun, my car runs better than it has in a couple years. Backstory: I have a 2013 Hyundai Veloster Turbo and the last couple of years coils and spark plugs have been going pretty fast. I figured it was something with the ignition wiring or something else electric. The shop I've used regularly quoted me $1600 for new spark plugs, coils, and a wiring harness (all they would use were coils direct from Hyundai for $970!) plus labor. For a 12 year old car that's worth less than $3k I said no way, especially giving Hyundai that much for parts. I bought these guys, a set of coils and spark plugs from Amazon, a heat gun, wire cutter, and electrical cloth tape for about $70. With the heat gun, they worked great. The solder doesn't melt quite how you'd expect, but it does turn into a softer blob and may leak slightly silver - takes a minute or two after you focus the heat there with a narrow nozzle. Make sure the wires are good and jammed or twisted in the middle of the sleeve! I made the mistake initially of not having them touching too well before using the connector and had to redo - luckily they come off fairly easily with heat and wire stripper if needed. All in all, very pleased and having zero issues so far! They shrunk well, connections are solid, and I know the wires will be better protected from humidity and heat.

### ⭐⭐⭐⭐ Great for putting 2 wires together.
*by J***T on January 15, 2026*

Great for putting wires back together in my truck. Easy to use and holds great if you install them correctly. Nice storage included and the quality is good.

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-02-22*