 Coolant leaks can be tricky as the cause may be any number of problems. K-Seal is a one-step permanent multi-purpose system for coolant leak repair. We recently sat down with Mike Schlupp, Managing Director of K-Seal International. Mike talked about a number of different symptoms including coolant loss with no apparent leak. Well this points to a failing head gasket which if left untreated can lead to serious engine damage.