Coolant Question
 

Has anyone heard of Pentofrost SF? In December I had the thermostat housing assembly replaced and they flushed the cooling system and replaced the DEX COOL with this Pentofrost product. The only spec on the bottle is ASTM D-3306 and it is pink.
Now only two months later I have another coolant leak that has not been checked out yet but I am wondering if this coolant might be wrong for the car and causing problems.
Any knowledge of Pentofrost out there?

More likely your coolant recovery tank has failed, assuming they replaced the entire upper rad hose assy as part of the t-stat work... otherwise may well be some of the plastic gubbings on it.

The coolant recovery tank was low, about an inch from the top so I filled it and heard the coolant gurgling as it leaked out from somewhere above the belly pan and came off the rear of the belly pan on to the floor. No leak visible at the front of the engine so I am hoping it is a hose connection somewhere out of sight. Into the shop on Wed.