Bedec All Prime Stain Blocking Rust Inhibitor Metal Primer Interior and Exterior Water Based All surface all purpose primer Quick Drying and Recoatable after 4 hours Water-based and environmentally friendly Bond Coat, Knotting, Stain blocking primer and sealer Use on walls, ceilings, doors, trim, fascia, soffits, railings, ferrous, and non-ferrous metals For interior and exterior walls, ceilings, doors, trim, fascia, soffits, foundations, railings, ferrous, non-ferrous metals and related paintable surfaces. Some stains may require a second coat. For best results, allow to dry overnight before applying topcoat. Very porous woods may require two coats before the topcoat. Coverage 10m2 Per Litre. Coverage may vary with surface porosity