Castle ESC's: Water resistant and/or water proof?

[webracer]

I have never had to remove it, but I think I'll try it on an old mainboard and see if it is easily removed.
I am new to surface RC, and have been primarily with Scorpion motors and ESCs for my helis and acros, but I may switch. So far the change over to the MMM in my G4 has been a pleasant experience, due in no small part to the great (US based) customer service of CC. You guys have a great rep in surface stuff as far as I can see, and my experience (with CC) has reinforced the results of my research. I was considering EZRUN, Tekin, and CC. I am glad I went with CC.