A water based primer-sealer for interior or exterior surfaces. Binds chalky siding, without washing; adheres to glossy walls and trim, without sanding. Covers dark colours . seals cedar and redwood bleed . other stains. Flexible. breathable film assures exterior paint durability. Recoat 1 hour . clean up in soap and water. Extremely low flame spread and smoke generation ratings, which makes it excellent for use in institutional, commercial and industrial application. Blocks out most stains, graffiti, water, grease, rust, smoke, redwood, cresote and asphalt so they can't bleed through top coats and ruin the job. Can be top coated with either oil-based or latex paint