Stain Blocker is General Finishes' revolutionary water-based white primer for interior projects. With a sophisticated resin system and an atypical formulation, Stain Blocker can be used where only solvent based products could succeed before: 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.
š We recommend Stain Blocker to block tannins and existing stained finishes from bleeding through a painted finish.