[mkiv] Toyota Red Coolant life

[workmanw at bellsouth.net]

A few years ago I got a number of brand new, unopened jugs of Toyota red coolant from a friend.  I still have one or two left but I wasn't sure if it has "broken down" over the years or if it is still o.k. to use.  It has not necessarily been kept in a climate controlled place (outdoor storage shed).  Any light someone could shed on this would be great.