Zinsser Cover Stain is an oil-based interior or exterior primer, sealer, stain sealer and bond coat that dries for re-coat in only two hours. Cover Stain sticks to all surfaces without sanding has great hiding power on interior surfaces providing outstanding stain killing and enamel undercoating performance. Stains of all kinds are permanently sealed so topcoats are blemish-free. Cover Stain is especially effective on smoke, nicotine and water stains, new wood trim can be primed, sanded and top coated the same day, saving time and money. Cover Stain is Zinsser best exterior wood sealer and delivers full penetration and flexibility on all surfaces, especially dimensionally unstable wood panelling and trim, also blocks cedar and redwood bleed. Cover Stain resists cracking and peeling and is compatible with all decorative topcoats. Cover Stain resists cracking and peeling and is compatible with all decorative topcoats. Coverage - 9.8m2 per Litre. Touch dry in 35 mins, hard dry in 4 - 7 days and re-coatable in 2 hours.