CoversUp Aerosol is a low odour vertical aerosol that is a stain killer and ceiling touch-up paint in one. Zinssers stain blocking primer technology is incorporated into this next generation product that offers a flat white finish, which matches most acoustic ceiling tiles and white ceiling paints. CoversUp is a great stain blocking primer for any ceiling surface. It is the perfect touch up paint when you do not want to repaint the entire ceiling due to spot damage. One coat of CoversUp permanently blocks and seals most common ceiling stains. Application - For interior use only. Use at room temperature in a well ventilated area - avoid high humidity. Shake can vigorously until ball inside can rattles. Turn upside down and continue shaking for one minute - shake occasionally during use. Spray 25-30cm from object with short dusting strokes. Surface may be painted in 30 minutes. To clear spray for future use, turn can upside down and spray until clear gas is emitted. Coverage - Approximately 1.5m2 per can.Drying Times - Dry in 30 minutes. If a topcoat is required, allow two hours before applying high-hide water based or solvent based paints. For best results when applying solvent based coatings, allow to cure overnight.