Is it possible to make a 3-way connection with these?

It is possible, yes, but it’s a little tricky. Two of the wires end up being twisted together and inserted into one side and the third wire ends up on the other side. You’ll likely have to use the next size up to accommodate the double strand. I’d recommend adding heat shrink to the side with the single wire, as it may not seal as well as the other side, since it’s stepped up. The connections I made this way have been in service on my car for more than two years without any issue.

Do these connectors work on 14 awg solid copper wire (in 14/2 waterproof cable) laid underwater to a small island (110 vac)?

Hi friend, we are so sorry to tell you that these solder connectors are not suitable for solid copper wire. Actually they are designed for stranded wire. We recommend you to use heat shrink crimp butt connectors. It woule be safer for your projects after the solid copper wire being crimped and heat shrinking. If you have any additional questions, just contact us seller. We will do our best to assist you. Thank you!

Can this be used with AC electrical?

It can be used with any wire. You have to find the size that you need. My husband used it on a beacon light that goes on top of your vehicle and it works really good.

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120PCS Solder Seal Wire Connectors - Sopoby Heat Shrink Solder Connectors - Waterproof Solder Butt Connector Kit Insulated Automotive Marine Electrical Wire Terminals

120PCS Solder Seal Wire Connectors - Sopoby Heat Shrink Solder Connectors - Waterproof Solder Butt Connector Kit Insulated Automotive Marine Electrical Wire Terminals

Product ID: 346642993

Details

Colour
Yellow Blue
Connector Type
Ring
Contact Material
Copper
Insulation Material
Polyolefin
Terminal
marine solder

💧Waterproof double wall

🔥Heat shrink seals tight

🛠️120-piece versatile kit

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$39.01

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Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔧 Seal it. Shrink it. Own it. The ultimate wire connection upgrade.

COLOR CODED PRECISION - Four distinct sizes and colors for quick identification and flawless wiring every time—stay organized and efficient.
CERTIFIED QUALITY SAFETY - Meets CE, RoHS, ISO 9001, and SGS standards, ensuring reliable performance and peace of mind on every project.
ONE STEP HEAT SHRINK MAGIC - Effortlessly create durable, soldered wire connections in a single step—no fuss, no mess.
ABRASION RESISTANT DURABILITY - Premium polyolefin tubing shields wires from cuts, scuffs, and harsh environments, extending your gear’s lifespan.
UNMATCHED WATERPROOF PROTECTION - Double-wall tubing with hot melt adhesive locks out moisture and prevents wire slippage, perfect for marine and outdoor use.

The Sopoby 120PCS Heat Shrink Solder Seal Wire Connectors kit offers a professional-grade, waterproof, and abrasion-resistant solution for secure electrical connections. Featuring color-coded, heat-shrink tubing with preformed solder rings, it ensures strong, long-lasting bonds across a wide range of wire gauges. Certified to international standards and designed for automotive, marine, and outdoor applications, this kit delivers reliable performance and easy installation in one comprehensive package.

Specifications

ASIN	B07S62KYSL
Best Sellers Rank	#248,055 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #81 in Butt Terminals #26,221 in Lab & Scientific Products
Brand Name	Sopoby
Colour	Yellow, Blue, Red, White
Connector Type	Ring
Contact Material	Copper
Country of Origin	USA
Customer Reviews	4.6 out of 5 stars 15,168 Reviews
Insulation Material	Polyolefin
Insulation Material Type	Polyolefin
Manufacturer	Sopoby
Material	Solder
Material Type	Solder
Maximum Voltage	600 Volts
Model Number	Sopoby334
Specification Met	CE, ISO 9001, RoHS, SGS
Temperature Rating	125 degree celsius
Terminal	marine , solder , terminals
Terminal Type	marine,solder,terminals
Unit Count	120 Count

Reviews

W**4

The best invention for fixing wires that mankind has ever made.

2.08.2021

J**D

Good quality

27.03.2025

K**R

easy to use and works as described

14.11.2025

S**N

Heat shrinking tunes.

28.08.2023

R**A

Good product!

4.11.2024

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Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to USA.

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