7-cell vs. 2s lipoly

Alright, so can anyone tell me if my LiPos can be made to be "waterproof" enough for me? I plan on getting a Summit when they some out, and lets face it, my Summit is going to get wet, probably submerged, and I want to do what I can to make sure my LiPos make it.

I plan on getting some large 3" heat shrink and some electrical tape to protect the cells themselves. I also plan on using RTV silicone to seal around where the connections attach to the cells. I know that I will have to protect the balance taps during run times, but no one has ever answered me as to whether or not LiPos can "take the plunge".

Here's to hoping to getting some straight answers.