Zinsser Cover Stain White Oil-Based Alkyd Primer and Sealer — 5 gal is a veteran choice for taming stubborn stains and delivering a rock-solid base for topcoats on any surface, indoors or outdoors. Built on an oil‑based alkyd foundation, this primer seals in blemishes, blocks bleed‑through, and creates a durable, uniform surface that topcoats can cling to with confidence.
What makes this primer stand out
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Powerful stain blocking: Formulated to tackle common troublemakers like water stains, smoke marks, grease, and tannin bleed, so you can paint with fewerPrep steps and fewer reworks.
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Versatile adhesion: Bonds reliably to a wide range of surfaces—wood, plaster, drywall, metal, and previously painted substrates—even glossy or slick finishes that typical primers struggle with.
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Oil-based alkyd performance: The durable, film-forming alkyd resin provides excellent hide and superior stain sealing, helping you achieve a smooth, uniform topcoat outcome.
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Tintable option: While shipped white, it can be tinted to achieve the perfect undertone for your final color, reducing the chance of showing through on final coats.
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Practical workflow: A 2-hour recoat window speeds up your project, with full cure in about 7 days for a robust finish. Clean up with paint thinner when you’re done.
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Generous coverage: Packaged in a 5-gallon can that covers up to roughly 2000 sq ft (about 400 sq ft per gallon), making it economical for larger jobs or multiple rooms.
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Indoor and outdoor use: Suitable for exterior siding, trim, and interior walls, so you can use a single product across projects for consistent results.
Ideal uses and scenarios
- Priming new or repaired wood surfaces, plywood, or mitered trim where tannin bleed or knot resin is a concern.
- Sealing water stains, smoke damage, or grease marks on walls, ceilings, or surfaces that will receive topcoat enamel or acrylic finishes.
- Priming glossy sheens, metal doors, railings, or previously painted surfaces where superior adhesion is required for long-lasting color retention.
- Exterior applications on siding or trim where a tough, stain-blocking base helps the final paint resist peeling and staining from weather exposure.
How this primer fits into your project plan
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Prep and prime sequence: Clean the surface, shake well, and apply a uniform coat. For knotty or stained areas, a slightly heavier, even lay-in helps ensure complete bleed-through prevention.
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Topcoat readiness: After the recommended recoat window of about 2 hours, you can apply your chosen water- or oil-based topcoat. Sand lightly between coats for maximum smoothness.
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Ventilation and safety: Use in a well-ventilated area due to the oil-based formulation. Clean tools with paint thinner after use and allow full cure time before heavy use or cleaning of the finished surface.
Why choose this primer over alternatives
- For jobs where bleed-through is a risk, especially from tannins, water stains, or nicotine, this Cover Stain primer provides a more reliable seal than standard latex primers.
- Its durable alkyd film resists scuffs and provides a solid base for both exterior and interior topcoats, helping colors stay vivid longer on challenging surfaces.
- One product covers multiple needs—prime and seal in one coat, reducing the number of products you need to buy and simplify your project plan.
Key specifications at a glance
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Base Type: Oil-Based
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Coating Material: Alkyd
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Color: White (tintable)
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Container Size: 5 gal
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Coverage Area: up to ~2000 sq ft per container (about 400 sq ft per gallon)
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Time Before Recoating: ~2 hours
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Full Cure Time: ~7 days
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Indoor/Outdoor: Indoor and Outdoor
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Clean Up: Paint thinner
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Recommended Surface: All Surfaces
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VOC Level: 350
