Stain Blocker is General Finishes' revolutionary water-based stain-blocking primer for interior projects. Stain Blocker can be used to protect pigmented finishes from stain, dye and wood tannin bleed-through. Brush or spray over an existing finish, raw wood or MDF as a base coat for light-colored General Finishes Milk Paint and Pigmented Polys

General Finishes Stain Blocker