a protective material comprising a pre - polymer and a curative is applied to a finished surface . near equal amounts of the pre - polymer and curative are mixed , pre - heated , and applied to the finished surface by a portable spray mixer apparatus having a disposable mixing spray nozzle . for temporary protection , a releasing agent is applied to the finished surface prior to application of the protective material . the short cure period of the present invention facilitates repeated , fast applications in construction sites to provide impenetrable protection for finished surfaces .