The invention relates to curable coating compositions containing at least one surface modifying amphiphilic additive; and at least one siloxane-polyurethane coating composition. The invention also relates to methods of making and using the curable coating compositions of the invention. The invention also relates to objects coated with the curable coating composition of the invention. The invention also relates to methods for reducing or preventing biofouling of a surface exposed to an aqueous environment comprising the steps of coating the surface with the curable coating composition of the invention to form a coated surface, and curing the coating composition on the coated surface. The invention also relates to a marine fouling-release coating containing the curable coating composition of the invention.