Originally Posted by Uncle Cereal
This afternoon, in a warm garage, I mixed some fiberglass resin and some hardener together. It seems like I had the right proportions... I did my job, left and came back three hours later to find everything as liquidy as when I left. The resin was purchased a couple years ago. I didn't think it could go bad...can it? The tint was greenish instead of the regular caramel color.
I washed everything and started over with new resin. All seems normal this time.
Were I work we make composite resins ( fiberglass ) is just one name.
As it gets old it will gell up , you can still use two year old resin but it may take longer to harden up. You should mix it 100 to 1 resin to hardener.
Last summer I was doing some fiberglassing and did not use enough hardener and it took over night to dry.
Hope this helps.