Zinsser 5 gal. Cover-Stain Interior and Exterior Oil-Based Primer Sealer

Get ultimate hiding power indoors and out with the Zinsser 5 gal. Cover-Stain Interior and Exterior Oil-Based Primer Sealer. This whole house primer sealer is a favorite with professionals and DIYers alike, formulated to effectively block tough stains, hide dark colors, and prevent tannin bleed. It penetrates and seals exterior wood while adhering tightly to a wide variety of surfaces without requiring sanding. Ideal for whole house priming, this high-performance formula seals water, smoke, and nicotine stains to ensure a clean, uniform topcoat finish. Whether tackling remodeling projects, new construction, or exterior siding, it delivers dependable adhesion and stain-killing performance.