SmartShield is a anti-microbial surface protectant that creates an invisible microscopic barrier on hard or porous surfaces preventing the growth of mold, mildew, algae, fungus and bacteria on surfaces for 1 year or more. EPA-registered, SmartShield can be used outdoors or indoors in countless applications providing superior protection. Ideal for simple spray application to outdoor fabrics, preventing the growth of harmful and unsightly organisms. OUTDOORS: apply to exterior siding, stone, brick, masonry, outbuildings, outdoor kitchen surfaces, wood decking, deck boxes, outdoor cushions & upholstery, awnings, patio umbrellas, flower pots, outdoor area rugs. Ideal in damp pool & spa areas to prevent mold and algae. Available in 32-oz. spray, or 1 gallon RTU.