On interior surfaces, Cover Stain dries quickly and has great hiding power, providing outstanding stain killing and enamel undercoating performance. It permanently seals stains of all kinds, so topcoats are blemish-free. Suitable for both interior and exterior use, it sticks to all surfaces without sanding. It seals water, smoke, and nicotine stains, and is our best exterior wood sealer, blocking cedar and redwood bleed. It touches dry in 35 minutes and is recoatable in 2 hours.