MoldShield is a durable and water-resistant anti-fungi protectant. Its proprietary polymer forms a long lasting barrier on virtually all hard surfaces and fabric to resist growth of molds for up to 12 months.  Test proof: 12 months?control and kill Aspergillus niger,? Penicillium pinophilum, Choetomium globosum, Gliocladium virens, Aureobasidium pllulans.