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Dielectric grease to water-resistize lights?

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Dielectric grease to water-resistize lights?

Old 07-01-21, 12:01 PM
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Dielectric grease to water-resistize lights?

My rear dynamo light looks pretty porous and has some electronics in there, so I was wondering if plugging up holes with dielectric grease would be a good idea. I hardly ever ride in the wet, but every now and then I do. The rear tire would blast water up right into the underside of the light if I rode over a wet surface.
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Old 07-01-21, 02:01 PM
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I doubt it would hold up in that application. I use it on connections all the time.
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Old 07-01-21, 02:03 PM
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I run fenders, thus not much tire spray. But if I was concerned about it, I would put a layer of electrical tape over the open spaces in the bottom of the light and call that good. Probably need several pieces of tape to get much of a seal around the wires where they enter the light.
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Old 07-01-21, 05:51 PM
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For my funky homemade lights, I seal stuff up with silicone caulk, aka RTV. Specifically, I like GE280, which is available at one of the local Ace hardware stores.

an example:

Steve in Peoria
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