Premier Copper Products offers a color matched Oil Rubbed Bronze Installation Silicone to install your new Copper Sink. A white plumbers putty will leave an unsightly ring around your sink or drain and will be unpleasant to look at when using your copper sink. It is a 4.5-Ounce tube of neutral cure silicone that matches a variety of different styled sinks.From the ManufacturerPremier Copper Products offers a color matched Oil Rubbed Bronze Installation Silicone to install your new Copper Sink. A white plumbers putty will leave an unsightly ring around your sink or drain and will be unpleasant to look at when using your copper sink. It is a 4.5-Ounce tube of neutral cure silicone that matches a variety of different styled sinks.