[mark m]

how long does a bag of resin last ? i have found a bag not opened nearly 1 year out of date i forgot all about do you think it will be ok ?

[richard jagger]

I would use it as long as the bag was closed . If its off it will not work for long.

[home6442]

Try it anyway if it works it works.
If not then dump it just keep an eye on the tds readings.

[Tom White]

My first bag lasted about three years and worked fine, even though it was all damp for years.

Just use it.