Abstract: A biocidal wax composition for preventing corrosion and biological fouling nd surface degradation of submerged structures comprises from about 10 to about 40 percent of total biocidal wax composition of a biocidal polymeric gel consisting of a polymer from the group consisting of a polyethylene, polypropylene, a copolymer of polyethylene and vinyl acetate, and mixtures thereof and a solvent selected from the group consisting of mineral oil, a paraffin wax and mixtures thereof, and a biocide; and from about 60 to about 90 percent of total biocidal wax composition of a wax matrix composition consisting of petrolatum, at least two chlorinated waxes, and a microcrystalline wax. The biocidal wax is prepared by shock-cooling a hot solution of a polymer through its cloud point, admixing a biocide with the gel, and admixing the above wax matrix composition with the gel.

Abstract: This invention provides an underwater antifoulant coating that is of a pa-like viscosity and is applied to an underwater surface by brush and comprises a mixture of multiple chlorinated and/or fluorinated waxes, an antifoulant biocide, and a fumed silica utilized as a thickener and produces a viscosity of about 26.75 poises at 25.degree. C., and a density of about 1.28.

Abstract: An antifouling coating for application to submerged surfaces comprises, by eight percent, from about 3-5% fumed silica, from about 60-70% silicone oil, from about 20-30% antifoulant, and from about 0.5-2.0% surfactant.

Abstract: A wax coating composition capable of underwater application to submerged faces comprises a mixture of from about 2% to about 18% of a polymer having the recurring unit-C.sub.2 F.sub.3 Cl -; from about 20% to about 40% of a microcrystalline wax; from about 40% to about 70% of a chlorinated paraffinic hydrocarbon and up to about 5% of a surfactant. An appropriate biocide may be interspersed into the wax to prevent marine growth.Another wax coating composition comprises a mixture of from about 16% to about 27% of a paraffin wax; from about 22% to about 33% of a microcrystalline wax; and from about 36% to about 58% of a chlorinated paraffinic hydrocarbon. A biocide such as the organotins or cuprous oxide antifoulants may comprise from about 2% to about 10% of the wax mixture.