It may have already been done on here but I cannot find it. I have an 06 vrs with a slight water leak. It has had its water pump changed. At 40000 and it's now done 45000, I cannot find any visual signs of any leaks, but the water is dropping about 1/2 a cup a week. Has anyone used radweld to fix small leaks? Does it leed to issues later if it's used? Please help.

Check the radiator fan switch, where it screws into the radiator. Also bottom corners of the radiator itself. Header tank cap, worth replacing first. If it only uses coolant after a hard run, suspect head gasket.