yes it does have a shelf life but in alaska where I did paint work for 8 years napa was the most popular place to get paint mixed, there was a few other places but they gave the cheapest prices and had good products, the shelf life there was short because they sold like hot cakes, here I am not so sure because well like everyone says who knows how much they sell and you do not want something that has been sitting around, their stuff is good quality though, and I will be going to them in about a month when I paint my car.