This was a product made by Penray in Elk Grove IL. (now in Downers Grove, IL.) that was added to the radiator to help your engine run cooler. Not sure of its vintage, and couldn’t find much on it but I think perhaps 1970’s.
Condition is good, showing slight rust around the top and bottom seams, a dent in the back that does not hinder its display impact. Please see all the pictures. The can is empty, but there are no holes in it so one can assume the contents leaked out at some point. Still, a nice piece with strong graphics.
