Losing water

[kenhaw]

Hi Guys



My problem is that my cooling system keeps loosing water and I cant identify why.
I have a new Griffin radiator and Be cool overflow tank.
No water in oil or underneath valve covers. Whats going on and how can I identify the leak?
How will the head gasket leak show? I have no white smoke either.
Is it stupid to use this radiator leak products which can fix the problem?