My Rover P4 came with its cooling system containing this product. The was a label with a wire twist attached to the overflow pipe.
As I needed to top up the cooling system and not being able to find the product anywhere it was replaced with conventional anti-freeze.
It has really left the cooling system in superb condition.
However, I wonder if anybody on the newsgroup has ever heard of the product? Also does anybody know if it is still available?
Regards.