Why not put expiry dates on the cement bags?
Cement expires after about six months. We expect that customers will not keep the cement for that long and would use the cement as fresh as possible. We buy bags in huge quantities and pack them with cement at different dates. However we do put a stamp on the bag with the manufacturing date so that the customer can know how long the cement has stayed. Remember though that with poor storage, your cement could go bad in one day.