What is the shelf life for Alumilite's casting resins?Updated 23 days ago

1 year is the standard shelf life in unopened containers/bottles. However, as long as the resin has been kept free from moisture, it may still be good to use for much longer periods of time. Resin that has been as old as 4 and 5 years old works with no problems as long as it has been sealed and free from moisture. Once moisture is exposed to the resin, the isocyanate side will begin to crystalize which is normally noticed originally around the cap and then inside the bottle itself. If your casting begin to produce air entrapment or bubbles in the casting and even potentially begin to foam, this is a clear indication that you have moisture in your resin/hardener. To best preserve your liquid resins, prevent moisture contamination by replacing lids and caps as soon as you are done using and store in a cool, dry place.