Bis-Silane™ 2-Part Silane/Porcelain PrimerA two part silane coupling agent offering additional shelf life stability to ensure long lasting effective bonding to porcelain and lithium disilicate. Bis Silane is great for offices that dont do a lot of porcelain bonding but want exceptional results fresh silane for every use. Curion is the official importer and Canadian source for authentic BISCO products. This product is backed by the manufacturer's warranty.