I like K&B a little better then Klass Kote, but K&B is no longer available, and KK is. I sprayed KK this past Monday with 23deg. temperatures. Not ideal conditions, but I am up against a deadline on a project. Although it has been reported that Klass Kote and K&B paint and catalyst can be mixed with each other (that is one brand of paint, and the other brand of catalyst) the results are not the same as staying with the specific brands. As an example is K&B paint with Klass Kote catalyst will dry to the touch, but is not fuel, or solvent proof.