I haven't used the clear but I do use other colors from them and they cure the same as the protec, the only thing I do different is protec I cure at 35o for 20 minutes and the columbia coatings paint I cure at 375 for 20 minutes. They come out just as hard as the protec but the colors I have recommend 400 for 15 minutes and that scares me so I go a little lower and add some time to it and it works great.