I have been a little discouraged with POR-15 , for me it just didn't want to harden for a few days so dust and bugs were a headache , but I did mix it with a drill attached mixer , so color was no issue . For me I noticed the pigment separated after a few days in the can and I had to mix it every time I used it . Maybe my problems were related to the high humidity ? I did use it during 90+ deg days and about 70% humidity with tons of never ending wind . I don't think I will ever use Por-15 again because of it not being user friendly for me . If you are just getting clear I would think that is a separation issue and it needs to be mixed better . If it has been on a shelf for a very long time it helps to add a marble into the can before shaking it to get the thick sludge at the bottom to stir into the rest of the mix .