Zinsser Covers Up Stain Blocking Aerosol 400Ml | Zn610481 Oil-based Seals water and smoke stains High hiding capabilities Non-yellowing Theoretical coverage 1.5m2/400ml Zinsser Covers Up Stain Blocking Aerosol 400Ml | Zn610481 Extend the life of stained or dingy ceilings with Zinsser Covers Up. This ultra-convenient product features a vertical aerosol spray that kills stains and touches up ceiling t in a single, smooth, even blast. The Zinsser Covers Up Stain Aerosol is an innovative vertical spraying aerosol that is great for blocking stains on ceilings Dries flat white. Features Matches the color of most ceiling tiles Sticks to all surfaces without sanding Primer and finish in one product Seals water and smoke stains