What is the recommended shelf life of MS?
Ideally, it should be used as soon as possible. The manufacturer has released a new improved formula with a non-crystallizing resin which states that it “should last a life time”. MS is distributed in plastic containers with tight-fitting lids. Having an originally sealed kit, there should be no problem to store it for a couple of years. The hardener may lose its pliability only after a couple of months (if you pay attention to the storage advice) and may appear “dry” or stiff. However do not discard it. Heat the hardener up to 40°C; it will soften up – but pay attention to your thermal source.
