This silver overlay paste is formulated for using on glass, glazed ceramics and porcelain. Can be fired in kiln,gas stove top or torch. We can only ship to you within North America and US territories. Mix/Stir before using as settling can occur.This paste like most metal clay products dries rapidly. While working with it add 1-2 drops of distilled water if it becomes dry. For Firing schedule and other info please check "Specification" tab below Instructions for Art Clay Silver Overlay Paste MSDS for Art Clay Silver