Baby Butz Cream claims to heal most diaper rashes in just six hours and to treat severe rashes in twenty-four hours. My experience with Baby Butz Cream is that the cream heals as fast, and sometimes faster, than promised. When I first applied the cream on my daughter, she had a small red rash from a dirty diaper. At the next diaper change about three hours later, I was pleasantly surprised to find the redness almost completely gone.