I've used this product for several decades-always gives consistent results-and my first 6 fl oz package lasted over a decade-and apart from the hardener darkening over the years, there were no other issues with either curing or the ease of use over that period. The small 2 Fl 0z package is probably a better option in terms of keeping an appropriate shelf life (whilst 10+ years is great-it was probably well outside the product's ‘best before’ specifications) if you're only an occasional user