Zinsser Coverstain is a solvent based primer/sealer for interior and exterior use on a veriaty of substrates. Suitable for blocking out water marks, nicotine and smoke damage. It is self piming and will adhere to most surfaces without sanding. Ideal for use on wooden surfaces where the flexible film and fast drying means most jobs can be completed within the day. Over coatable with both water-based and solvent-based paints. Touch dry in 30 minutes and recoat in 2 hours.