 Coolant leaks can be tricky as the cause may be any number of problems. KSeal is a one-step permanent multi-purpose system for coolant leak repair. We recently sat down with Mike Schlupp, Managing Director of KSeal 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.