Yes, potholes should be repaired before sealcoating. If potholes are not repaired before sealcoating, the sealant will not adhere properly to the asphalt surface, and the potholes will continue to deteriorate under the sealant. Sealcoating is a preventative measure that is used to extend the life of asphalt surfaces and protect them from damage caused by weather, traffic, and other factors. It is not a substitute for proper maintenance and repairs.