... with compound sealant. Normally, the spacers width of insulated glass is 6mm,9mm,12mm,15mm,18mm ect.Advantages1. Optical ... U value, especially when filled with inert gas3. Sound insulation Insulated glass can lower the noise, if applied with laminated pane ... silent. Quality In accordance with CE standardPass Chinese Safety Glass Compulsory Certification (CCC).We are the manufacturer for these ...