Just under 2 years ago I ordered 6 gallons of resin plus 12 quarts of the subject hardener. The resin arrived, the hardener did not. After waiting for a couple of weeks I called Aircraft Spruce and notified them of my missing hardener. They sent me 12 replacement quarts. All fine and good. I started using them. I’d say ~3 months later (maybe more) the original subject hardener shipment showed up. No cans were broken, absolutely no leakage, but it looked like the shipment was dragged from California up to Washington. There were a lot of heavily dented cans.

I called Aircraft Spruce and said I’d be happy to return them, but they’d have to pay the freight. They told me I would hear from them. Months later we had the same conversation. Finally, they said, you can keep them. They have never been opened and have been sitting in my heated (74 degrees) garage ever since.

I now need more resin but would like to use the subject hardener. I tried to reach Gary Hunter without success. Reading one of his presentations I am of the opinion that the hardener in the sealed, temperature-controlled cans is just like new, and I can use it.

I am looking for feedback from this very knowledgeable DL. Does anyone have any information on older hardener (~2 years) that has been in a sealed can and stored at 70+ degrees? Can I use these 12 cans of hardener?

Thanks,

Mike O’Grady