Thompson’s Stain Block Aerosol is the quick and easy no mess solution to obliterate unsightly stains preventing them from reappearing. Dry in only 10 minutes, stain block can be used on both walls and ceilings to obliterate the stains. Suitable for use on interior walls or ceilings, including plaster, cement and stone. Touch dry in 10 minutes. Shake well until mixing ball rattles and continue for one minute. Shake can occasionally during use. Hold can 9″-12″ (20-30cm) away from stained area, commence spraying, moving can in a motion from left to right or up and down until the area is covered with an even coat. Allow to dry fully and apply a second coat if required. When completely dry, surfaces can be painted or wallpapered over.