AREMCO-Seal 617 is used to produce hermetic seals in porous ceramics and refractories for applications up to 1,450°F. It is a single part, water-based, glass coating used in electrical and high vacuum applications. Easily applied by dipping, brushing, or spraying, and it cleans up prior to curing with warm water. Curing takes place at room temperature for 30 minutes, then heating at 1,600°F for another 30 minutes.