The original porcelain etching gel. Ceram-Etch is a 9.5% hydrofluoric acid, porcelain etching gel used for the etching of "all porcelain" restorations. It enhances bond strength by dissolving certain elements in the porcelain to create undercuts and voids in which the composite resin can flow. Etching with Ceram-Etch is the basis for the time-honored technique of etching, silanating, and bonding with composite resin that is used by some of the premier cosmetic dentists in the USA. No neutralizer is required, just rinse the restoration with water and place in an ultrasonic cleaner. Packaged in a 15cc bottle. Made in the USA.