You need to evaluate the surface texture first to figure how much sealer you will need. If it is rough, it may take 2 or 3 apps. If it is smooth, it may take 1 thick or 2 normal apps. We have an excellent book available through http://www.barnesandnoble.com or amazon.com called Guide to Pavement Maintenance that will teach you how to bid crack sealing, seal coating, patching, paving, slurry seal etc. Check it out
