Yes, it could be a problem. But that’s the nature of DIY stuff like this. How well is it enclosed? If it is literally just right under the griptape and nothing else is acting as a seal then potentially there could be a problem if water were to ever sneak in there, but at the same time I don’t think any people on here have ever used griptape to seal anything off and much less have had any issues with water getting under it. The Evolve boards might be the closest thing to using griptape as a way to enclose the deck.
It’s just between kapton tape and fish paper right now. I haven’t put the grip tape on yet what would be best to inslated with?
I’m now wondering whether it would be better to run sone silicon wire on the underside of the deck instead. It’s a mtb so I need to be able to use in wet conditions.
You could do what Al said with the heatshrink, but if you seal it in well it will probably be fine. Are you running positive and negative together in a way that they could actually short out?