The typical shelf life for any of the TotalBoat brand epoxy products depends on the conditions in which they're stored—temperature and exposure are the biggest factors, as well as what type of product it is. All TotalBoat epoxy products clearly state the storage conditions on the label. Not all TotalBoat epoxy products will state a shelf life, but it is safe to assume at least 1-2 years minimum, if stored properly. Besides temperature, humidity and contaminants are the biggest factors to shortening an epoxy product's shelf life. Products that contain a thickening agent may also have a shorter shelf life.
Generally, epoxy hardeners are more prone to permanent polymerization from being exposed to high humidity for extended periods of time, or where other contaminants are present, while epoxy resins may become crystallized, usually due to being stored in cooler conditions than specified. TotalBoat Epoxy products that show symptoms of crystallization can usually be reconstituted by warming the material in the container to 120-140°F. Putting the container in a warm water bath is the most common method to do this. If the material does not reconstitute after it reaches 140°F, the product should not be used.
Always check the manufacturer's specific information regarding shelf life for the resin you're using, paying careful attention to storage recommendations. Keep in mind that many specialty products have relatively short shelf lives that are based on their date of production.