Zinsser Cover Stain is a fast-drying oil-based alkyd primer, sealer, and stain blocker designed for the toughest priming challenges. The alkyd formula penetrates and seals bare wood grain while blocking severe stains from smoke, fire damage, water marks, nicotine, and heavy tannin bleed that water-based primers can struggle with. Interior and exterior use on wood, drywall, plaster, concrete, masonry, and previously painted surfaces.

• Oil-based alkyd formula for superior stain blocking and penetration
• Coverage approximately 400-450 sq ft per gallon
• Dries to touch in 1 hour; topcoat in 2 hours
• Blocks smoke, fire, water, nicotine, and tannin stains
• Penetrates and seals bare wood for smooth enamel hold-out
• Sticks to glossy surfaces without sanding
• Low-VOC oil formula for regulatory compliance in most jurisdictions
• Apply by brush, roller, or airless sprayer
• Compatible under oil-based and latex topcoats
• Clean up with mineral spirits

Tip: Reach for Cover Stain when facing heavy nicotine, fire, or wood tannin bleed - the alkyd resin locks these stains down where water-based primers can bleed through.

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