The Unger Neoprene gloves are totally waterproof, not that it makes any difference of course because your hands sweat inside them and the insides get wet anyway as they can't breath!
When I used them, I'd have two pairs and would turn one pair inside out to dry whist continuing to use the other pair.
And if my bucket of water was hot, I'd stick my hands in there to warm them up...with the gloves on I mean, and if the gloves were dry inside they stayed dry...er...until my hands got sweaty that is!
Ian