Abstract: A protective system for concrete, wood and steel piling or other structures subject to corrosion or wear from the action of water. The system includes an encasement sleeve surrounding the piling or other structure and made of fiberglass, epoxy resin, or other inert, corrosion resistant material, and a filler of concrete, epoxy resin or the like between the encasement sleeve and the piling. The encasement sleeve is made of separate sections connected together by tongue and groove joints. The encasement and filler are left permanently on the structure to protect the same from water or other elements, and also to reconstruct worn portions to achieve the original structural integrity of the structure.