Niteo Cyclo ULTRAWELD Instant Gasket Maker: Clear RTV Silicone Adhesive Sealant, 3 fl oz, Case of 12 Oxygen sensor-safe; pressure resistant Seals windshields and windows, forms instant leak proof gaskets on all engines Low volatile formula meets GM 9985443 spec Great adhesive and sealant for many materials like metal, glass plastic, wood rubber, fiberglass 100 percent silicone - no fillers added