Primer Coat
A primer coat is the sealing undercoat you roll on drywall, wood, or stained walls before the color paint.
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Introduction
A primer coat is the sealer under your paint—KILZ-style stain blockers, PVA drywall primers, and adhesion primers—not a nail base. You roll it on new drywall, tannin-heavy wood, or stained walls so the topcoat colors evenly and hides old marks.
- Oil-based stain and odor block versus water-based PVA that only seals new board
- Interior-only versus interior/exterior on the can
- A quart for a door versus a gallon or five covering hundreds of square feet
Pick chemistry, interior versus exterior, and can size before you primer coat under color.