--- product_id: 351721914 title: "Kuject 300PCS Blue Heat Shrink Butt Connector, Waterproof Self Solder Sleeve Electrical Butt Splice for Automotive Marine Boat Trailer Truck 16-14 Awg" brand: "kuject" price: "$68.91" currency: USD in_stock: true reviews_count: 8 category: "Kuject" url: https://www.desertcart.us/products/351721914-kuject-300pcs-blue-heat-shrink-butt-connector-waterproof-self-solder store_origin: US region: United States of America --- # Supports 16-14 AWG wire gauge IP67 waterproof rating 3:1 shrink ratio for tight seals Kuject 300PCS Blue Heat Shrink Butt Connector, Waterproof Self Solder Sleeve Electrical Butt Splice for Automotive Marine Boat Trailer Truck 16-14 Awg **Brand:** kuject **Price:** $68.91 **Availability:** ✅ In Stock ## Summary > 🔧 Seal the deal with every connection—waterproof, flawless, and fast! ## Quick Answers - **What is this?** Kuject 300PCS Blue Heat Shrink Butt Connector, Waterproof Self Solder Sleeve Electrical Butt Splice for Automotive Marine Boat Trailer Truck 16-14 Awg by kuject - **How much does it cost?** $68.91 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/351721914-kuject-300pcs-blue-heat-shrink-butt-connector-waterproof-self-solder) ## 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 - • **Precision Heat Activation:** Exclusive material prevents premature tubing melt, guaranteeing a flawless solder flow every time. - • **Marine-Grade Waterproofing:** IP67 rating ensures your connections stay dry and corrosion-free in any environment. - • **Certified Automotive Quality:** Meets IATF16949:2016 standards for reliable, professional-grade repairs and modifications. - • **Flexible Fit for Tight Spaces:** Bendable connectors adapt to confined areas without compromising connection integrity. - • **Effortless One-Step Connection:** Solderless, crimpless design saves time and hassle—just heat and seal. ## Overview The Kuject 300PCS Blue Heat Shrink Butt Connectors deliver a professional-grade, waterproof solder seal for 16-14 AWG wires. Featuring a 3:1 shrink ratio and IP67 water resistance, these connectors simplify automotive, marine, and industrial wiring with a one-step heat-activated process that eliminates crimping and soldering. Certified to IATF16949:2016 standards, they ensure durable, corrosion-proof connections that save time and elevate your electrical projects. ## Description Product description WHY CHOOSING OUR STORE - For Kuject, quality is at the top of our selection criteria list. Quality has, and always will be, our core focus. Our heat shrink connectors are compliant with ISO 9001:2008, ROHS, SGS and CE standard. - Due to the nature of the products we sell, getting them to you quickly and efficiently is a key priority for our customers. That’s why we dispatch all our product by desertcart Fulfillment. - We continue to expand product range suitable for a wide variety of applications according to customer needs. We believe our products could meet the most needs for wire connection. IP67 Waterproof and Seal Performance High Success Rate Our wire connectors are upgraded to use exclusive material in the butt connectors to avoid shrink tubing melting before solder ring. The success rate of connecting wire has been greatly improved. Structure Features Polyolefin Tubing Outside and Hot melt Adhesive Inside make connection strong and waterproof. Specification Shrinkage ratio is 3:1 Temperature that starts to shrink: 80℃ Temperature that solder ring start to melt: 111˚C Temperature that solder ring melt completely：138˚C Note: It means the temperature of surface of the connector, rather than the temperature that the hot air gun should set. Review: Overall this is a very good product - We have used several brands of solder butt connectors like these. They all work in a similar fashion. This brand is very consistent from connector to connector and melts well. We noticed that it took a bit more heat to melt the solder to a good flow into the wires. It is just a matter of finding the correct balance between amount of heat being applied and the distance between the heat source and the connector being melted in. Just a bit of practice, but we have used a lot of these. For added insurance we do cover the finished joint with a separate piece of heat shrink to get a really secure joint. Review: Better than the old crimps - It’s 2024 please stop using the old wire crimps. These are great and you’re actually making a solid connection that is also waterproof. They’re easy to use they stink around the wire great and have a little bit on glue that seals the connection ## Features - High Success Rate: Our wire connectors are upgraded to use exclusive material in the butt connectors to avoid shrink tubing melting before solder ring. The success rate of connecting wire has been greatly improved - Better Waterproof and Seal Performance: Solder seal wire connectors come with IP67 water-resistant rating. After being heated, they shrink and water will not be able to go inside, preventing any short circuit issues. Widely used on marine projects - Fit for Confined and Narrow Spaces: The product can be bent after connection and no need to crimp or solder in the confined area, just control the temperature with a heat gun - Time Saver and Simple Process: Solderless, crimpless, one-step solder and seal process for all your connections, much faster and easier than the old way - 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 | B0957HRGFF | | Best Sellers Rank | #38,521 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #248 in Butt Terminals | | Brand Name | Kuject | | Color | Blue | | Connector Type | Butt Splice | | Contact Material | Copper | | Customer Reviews | 4.6 out of 5 stars 309 Reviews | | Gauge | 14.0 | | Insulation Material | Non-Insulated | | Insulation Material Type | Non-Insulated | | Item Dimensions L x W x H | 3.94"L x 3.94"W x 4.72"H | | Manufacturer | Kuject | | Material | Copper | | Material Type | Copper | | Maximum Voltage | 120 Volts | | Model | SSD300B | | Number of Items | 300 | | Part Number | SSD300B | | Specification Met | Ip67 | | Stud Size | 16-14 Awg | | Temperature Rating | 257 degree fahrenheit | | Terminal | Butt Terminal | | Unit Count | 300 Count | | Warranty Description | 90 days warranty from date of purchase | ## Images ![Kuject 300PCS Blue Heat Shrink Butt Connector, Waterproof Self Solder Sleeve Electrical Butt Splice for Automotive Marine Boat Trailer Truck 16-14 Awg - Image 1](https://m.media-amazon.com/images/I/81Le+W7nYoL.jpg) ## Available Options This product comes in different **Size, Number Of Items** options. ## Questions & Answers **Q: How is the quality of these? i never heard of this brand and can not chance using inferior components on any repairs i do. my reputation's worth more** A: If you're a professional you should really be using the real ones, i.e. from TE Connectivity (originally Raychem SolderSleeve). I've never used one of these Chinese-sourced ones that was nearly as good as the originals. The plastic on TE's is far superior, the glue spreads better, and the solder melts nice and flows well. Basically, you get what you pay for, and I'd hope a professional would be using the best product, depending on which industry you work. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Overall this is a very good product *by T***L on October 29, 2023* We have used several brands of solder butt connectors like these. They all work in a similar fashion. This brand is very consistent from connector to connector and melts well. We noticed that it took a bit more heat to melt the solder to a good flow into the wires. It is just a matter of finding the correct balance between amount of heat being applied and the distance between the heat source and the connector being melted in. Just a bit of practice, but we have used a lot of these. For added insurance we do cover the finished joint with a separate piece of heat shrink to get a really secure joint. ### ⭐⭐⭐⭐⭐ Better than the old crimps *by C***Y on June 19, 2024* It’s 2024 please stop using the old wire crimps. These are great and you’re actually making a solid connection that is also waterproof. They’re easy to use they stink around the wire great and have a little bit on glue that seals the connection ### ⭐⭐⭐⭐⭐ high quality, melt nicely- i have bought over 1000 (commercial trailer repairs) *by M***H on September 3, 2025* identical to what I used to get from Fastenal but a way better price! --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/351721914-kuject-300pcs-blue-heat-shrink-butt-connector-waterproof-self-solder](https://www.desertcart.us/products/351721914-kuject-300pcs-blue-heat-shrink-butt-connector-waterproof-self-solder) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-12*