I'll be finsihing my basement soon. It's all 12' block. I was going to get a 5 gallon bucket of DryLock to seal it. When I mentioned that to some folks, they tell me that DryLok prevents the walls from "breathing" the way it was intended. Others have said if I want to finish it, I must use the DryLok. I've seen pictures of some of the basements ATOT users have done and wondered what your opinions are.