As a general rule, try to never buy more of any one product that you can't reasonably see yourself using in 1.5 - 2 years time.
At CAR GUYS, we sometimes like to reformulate and tweak formulas every few years. We will NEVER reformulate just to try to increase profits. We take pride in only offering the very best products on the market, and only ever consider reformulating to keep up with advances in chemical engineering.
Most of our products will stay good for about 2 years, sometimes longer, just make sure it stays above freezing and you should be just fine.
Side note: Since Liquid Wax only needs to be used every 6 months or so, we like to keep our Liquid Wax in the fridge! 😊