In one application, this Mold Armor Mold & Mildew Killer kills mold and mildew 99.9% of bacteria in 30 seconds. This is not just a typical bathroom cleaner, Mold Armor works wonders on non-porous surfaces including bathtubs, shower doors, toilet seats, countertops, sinks, sealed grout, vinyl, garbage cans, plastic surfaces, sealed fiberglass, sealed granite, glazed porcelain tile, glazed ceramic tile, laminate, formica and linoleum. Nothing will get your shower cleaner than this mold control shower spray.