Cover Stain® Primer - Sealer 2.5 litre - Zinsser ZN7080001C1, Zinsser's Cover Stain® is an interior / exterior primer, sealer, stain sealer and bond coat that dries for recoat in only two hours.On interior surfaces, Cover Stain® dries quickly and has great hiding power, 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 nicotine and water stains. New wood trim can be primed, sanded and top coated the same day, saving time and money. On exterior surfaces, Cover Stain® has a unique formulation that delivers full penetration and flexibility on all surfaces, especially dimensionally unstable wood panelling and trim, where few oil-based primers can succeed. It resists cracking and peeling and is compatible with all decorative top coats. The primer is white in colour, but can also be tinted to mid-tone colours. It can be applied via an airless sprayer, brush