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Zinsser® Cover Stain™ is a high performance, oil-based undercoat/sealer/stain blocker/bond coat that combines fast dry convenience with excellent adhesion and stain blocking properties. This all-purpose oil-based undercoat primer-sealer can be used over or under any water or solvent-based architectural paint and is suitable for new construction and remodeling. Cover Stain is suitable for interior and exterior walls, doors, trim, paneling, siding, window frames and shutters – any surface where a fastdrying and high hiding undercoat is needed.