Waterproof shrink solder connectors?

75slant6 said

Anyone use connectors like this? Are they as good as the videos for them make them look? Thanks in advance.

https://www.amazon.com/dp/B07JGQFJK2/?tag=joeychgo-20

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I purchased the Amazon brand and the plastic tends to start melting before the solder. I tried a mini butane torch as well as a heat gun with the same result. I would recommend a better quality item in the future. The idea is good, though.