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.

120pcs Solder Seal Wire Connectors Sopoby Heat Shrink Waterproof Solder

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Description

🔥 Seal the deal with every connection — waterproof, durable, and ready to perform!

VERSATILE ALL TERRAIN USE - Perfect for automotive, marine, off-road, and even holiday lighting projects—connect with confidence.
RUGGED ABRASION RESISTANCE - Polyolefin heat shrink tubing shields wires from cuts, scuffs, and harsh environments.
EFFORTLESS PRO GRADE CONNECTIONS - Solder ring melts at 138℃ for seamless, durable wire joints every time.
OPTIMIZED ELECTRICAL PERFORMANCE - Copper tin barrel ensures superior current flow and minimal voltage drop to keep your gear running.
UNMATCHED WATERPROOF RELIABILITY - Double-wall tubing with hot melt adhesive locks out moisture and prevents wire slippage.

The Sopoby 120PCS Solder Seal Wire Connectors kit features heat shrink tubing with an internal solder ring and hot melt adhesive, providing a waterproof, abrasion-resistant, and electrically efficient solution for wire splicing. Rated for up to 600 volts and temperatures from -67℉ to 257℉, this kit is ideal for automotive, marine, and industrial applications requiring reliable, long-lasting wire connections.

Specifications

ASIN	B07S62KYSL
Best Sellers Rank	#10,379 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #69 in Butt Terminals #3,143 in Electrical Equipment
Brand Name	Sopoby
Color	Yellow, Blue, Red, White
Connector Gender	Male
Connector Type	Solder
Contact Material	Copper
Customer Reviews	4.6 out of 5 stars 15,393 Reviews
Gauge	AWG 26-10
Insulation Material	Polyolefin
Insulation Material Type	Polyolefin
Manufacturer	Sopoby
Material	Polyolefin Tubing with Hot Melt Adhesive & Solder inside
Material Type	Polyolefin Tubing with Hot Melt Adhesive & Solder inside
Maximum Voltage	600 Volts
Model	Sopoby334
Number of Items	120
Part Number	Sopoby334
Specification Met	① Minimum Shrink Temperature: 80℃, ② Minimum Temperature for Solder to Melt: 138℃
Temperature Rating	Working Temp: -67℉ - 257℉
Terminal	Butt Terminal
Unit Count	120 Count

Reviews

T**E

29.08.2025

R**A

4.11.2024

K**R

14.11.2025

C**Z

31.01.2025

T**D

23.03.2026

J**N

22.03.2026

R**S

25.02.2026

M**A

1.09.2025

W**4

2.08.2021

D**S

5.04.2026

S**N

28.08.2023

W**R

20.02.2021

R**Y

11.09.2021

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₩25713

Duties & taxes included

In stock

Sold byAmazon South KoreaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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 South Korea.

Secure transaction

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

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