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Pyro-Paint^tm 634-ZO is a high purity, zirconium oxide filled, water-based, chemically resistant coating system used to extend the life of ceramic, graphite and metal crucibles and molds used in the handling of molten metals in applications to 3270 ^oF (1800 ° C). Pyro-Paint^tm 634-ZO exhibits excellent adhesion to ceramics, graphites and metals and is resistant to wetting by a wide range of metals including Steels, Acidic Slags, Al, Pt, Rh, Zr, Nb, Mo, W, U, Ti, Pd and Ru. Pyro-Paint^tm 634-ZO provides excellent durability and erosion resistance.

Pyro-Paint^tm 634-ZO is formulated with a solids content of 54.0% by weight and 32.4% by volume to a viscosity range is 3,000 to 5,000 cps. It is typically applied by brush, roller or conventional spray equipment. Dry films up to 5-10 mils can be produced without cracking. Cured films are greater than 95% pure zirconium oxide.

Pyro-Paint^tm 634-ZO is a simple to use, environmentally friendly, water-based formulation containing no volatile organic compounds. It dries at room temperature in several hours and cures fully within 2 hours at 200 ^oF.

Pyro-Paint^tm 634-ZO is part of a line of refractory coatings based on ceramic fillers including aluminum oxide, alumino-silicate, boron nitride, carbon, graphite, and yttrium oxide.