Miracote MiraPatch RM3 7068-50 50 lb Bag Powder Repair Mortar. Miracote MiraPatch RM 3 is a two-component unit consisting of a synthetic rubber latex liquid which is blended and stabilized together with a dry component containing a dehydrating powder and curing chemicals. This combination is mixed and applied on the job resulting in a smooth monolithic underlayment to receive finishing flooring.