Before application, ensure the roof surface is dry and completely free of dirt, moss and algae. NowoCoat Rubber Coating can be applied with a brush, roller, or airless spray equipment (200-220 bar). For older, worn roofs, it is advisable to use NowoCoat Rubber Coating over a base coat of NowoCoat Uni Primer. Alternatively, dilute the first coat by 10-15% and use the second coat undiluted.