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I've got some Chinese 24v RGB garden lights and they're not as waterproof as they're supposed to be.
The ones that are shining upwards are fine but the 3 that were facing downwards (with the cable entry pointing at the sky) have all got water in and have failed after 3 years.
I've bought some identical (at least Chinese identical - obviously out of a different factory) and I was thinking of filling the interior space where the electronics are with sealant. Is there likely to be any problem with that?
Seal the seams and wire enters points. Filling the internalsmay cause overheating problems so I’d not doing that.
it's the cable gland that seems to fail on them. the other joints are obviously sound.
I'd unscrew the glands, gob them up with sealant, and screw back together while it's all still wet.
...unscrew the glands...
Huh huh, glands...
Filling the internalsmay cause overheating problems so I’d not doing that.
so I went for
- seal from inside but trying to leave some air space for the board to cool
- and seal over outside to stop water sitting near the glands (huh huh).
Either the silicon bolloxed the circuit, they immediately overheated or they were DOA. Red led didn't work in two of them from the start and then failed in the third. green led failed while I was messing with them.
That was a productive afternoon then.
My painful experience is buy cheap, buy three times, give up and buy properly.