Karl, I ran across temp. sensitive stickers at Nepcon west. I've not used these, so I don't know how effective they are. Celsistrip, Celsi dot and Celsipoint are the product names. Solder Absorbing Technology Inc. (SAT) is the company. (413) 788-6191 or 800-628-8862 144 Oakland Street Springfield, MA 01108 Mitch Austin [log in to unmask]