Wondering if anyone can tell me what benefits there are to using hot crack sealer over cold. I'd like to just buy a diaphragm pump with an air compressor and use it to spray both the cold crack sealer and the driveway sealer but I'm not sure if the cold stuff holds up as well. I was also wondering if I could just use a propane fired outdoor cooker to melt the hot crack filler or if I would need something a little heavier to do the job? I have zero experience with the stuff so I'd like to get a bit of instruction before I go all the way with it. Thanks.