Does resin & mekp go bad?

I'm working on my first fiberglass project since 7 years ago (where i did a patch...) and i'm having a problem. I'm making a speaker pod, kinda bullet shaped. I carved the base out of floral foam and then went to glass it. On my first try i tried to eyeball the resin/mekp mix and totally did not add enough hardner and during the night, the mix ate away alot of the foam and did not even remotely cure. So... i sculpted a new foam piece and this time i meticuosly measured the resin/mekp mix then glassed up the foam and let it set over night in my shop which is about 68 degrees. Much to my surprise, when i came in today, it still hadnt even BEGUN to set up. I thought at first that maybe it was a chemical reaction with the foam, but then i realized that even the resin mix in the mixing cup hadnt set up at all! The resin/mekp im using has been sitting on a shelf in my shop for like 2 or 3 years, so i was wondering... Does it go bad? or am i doing something wrong? one thing that struck me as odd was that i remember the resin getting hot when i did it 7 yrs ago, but these 2 times there seemed to be no reaction....... Mitchell Whitney, Installer/technician

Mainstreet A/V

Yes, the hardener mekp will go bad.  Try some fresh hardener, should work.

will do. thanksMitchell Whitney, Installer/technician

Mainstreet A/V

I'm pretty sure that the MEKP hardener does not go bad. Resin definitely does though. "Drive it like you stole it"

From expreience I would say it is the resin that goes bad not the MEKP hardener. The Clear Bra Guy

KCs premiere paint protection guru

I used to work for a company who sold all fiberglass products and YES the resin will go bad after about 3 to 5 months and the hardener should last you about a year