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. Use 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 is designed for effectiveness, not price point. This primer has a sophisticated resin system and an atypical formulation. Use on pieces where you are concerned about bleed-through. For best stain & Tannin blocking 2 coats is recommended