Moss Out, Covers 500-Sq. Ft.

On outdoor structures, damaging moss can grow in nearly any location where dampness persists. Controlling structural moss may add years of service to roofs, decks, and walks. Liquid concentrate Moss Out spray kills moss and algae within hours on patios, driveways, sidewalks and roofs, yet it won't stain bricks, concrete, or asphalt. 27 oz. liquid concentrate covers 500 sf.