There is a quart can and a gallon can, the quart can will last you a pretty long time, but then you need the red hardener in the tube, the can comes with a tube of dark red hardener, but you usually need to buy another. You mix the two together to make a pink color paste that you spread over the cracks, pits, or the things ya need to fill. The darker the paste, the faster it cures ... but if its too dark, it just gets brittel. some people even reinforce large cracks with fiberglass cloth.