Low-Viscosity Polymer Seals Porosity in Welds

    WeldSeal™ is a high-performance methacrylate formulated for sealing porosity in welds as well as cast iron parts that will contain liquid or gas under pressure. Very low viscosity ( 3-5 mPa·s at 25° C) provides excellent wetting, and enables WeldSeal™ to wick (through capillary action) into pores, welds, and seams and between close-fitting metal surfaces. An anaerobic sealant, it cures in the absence of air (such as when confined in tiny cracks).

    Mixing the sealant's two components creates a translucent red liquid that can be applied with a brush. Once mixed, WeldSeal™ has a pot life of 24-48 hours (longer if refrigerated). Drawing a vacuum improves penetration. As it cures to a pressure-tight seal in about 60 minutes at room temperature, WeldSeal™ forms a densely cross-linked thermoset polymer. Heat accelerates curing. Uncured WeldSeal™ can be rinsed from parts, tools, and brushes with water - no detergents or solvents are required.

    Once cured, WeldSeal™ withstands continuous service temperatures of up to 180° C (355° F) and resists a broad range of chemicals, including oils, glycol, chlorinated and fluorinated solvents, mild caustics, acid solutions, and water. Typical cured hardness is 78 Shore D (ASTM D2240).

    Shelf life is12 months. A low-VOC formulation, WeldSeal™ has a typical solvent content of less than 0.1%.





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