How? If I was using normal toyota coolant I would still be having the same problem I'm having now but would be a lot worse due to the amount of pressure it would be creating and strain on parts such as hoses ect, if anything it has saved my engine as a water based coolant could have created a leak by putting too much strain on the cooling system, then again it may not have, but I don't see how it could mask a problem, it does the same job just in a safer way imo