Porcelain primer is a two-part silane coupling agent used to improve bonding between porcelain restorations and resin cements. Offers additional shelf life stability to ensure long lasting effective bonding to porcelain. Protects porcelain restorations from contamination, increases mechanical and chemical bonding of resin to the porcelain, and yields greater resistance to water leakage at the bonding interface. As recommended by Dr. Nasser Barghi.