If you are talking about the shelf life of solders and epoxies, I know that EMPIS specs call out a shelf life for some of these. I know the B20L5 spec for sure calls out the shelf life and storage conditions for this solder paste (80/20 Au/Sn). Hope this helps, let me know if you need anything further... Aaron Bundy. ______________________________ Reply Separator _________________________________ Subject: [TN] Shelf life requirements Author: [log in to unmask] at MAILHUB-SMTP