De-Solv-it products do not have a stated shelf life. The only issue that crops up with the product is freezing thru the winter. Should freezing occur the wax from the oil will solidify at the top of the container. This will not affect the performance of De-Solv-it. Just shake the container and the wax will simply re-dissipate.
Posted by DTEPStore on 12/9/2012 to De-Solv-it