pete, i would say it's good, i have beeswax foundation primarily in my supers, and some of it is at least 20 years old. this time of the season, bees are not likely to draw too much foundation of any sort and that would be my guess. how was it stored? might have a little 'wax bloom' on it but this shouldn't be a problem. are the bees capping the other supers of honey that are being ripened you have on top? are those frames full?