What is the shelf life of the Hakko 810 Hot Melt Adhesive?

There is no established shelf life for the HAKKO 810 Hot Melt Adhesive.  The product should be stored in a cool and dry location, and avoid prolonged exposure to sunlight.  Due to the hygroscopic nature of the material, it is important that after the package has been opened, care should be taken to prevent dust and/or moisture from entering the open package.