Our Microbe Shield is colorless, odorless, nonbleaching, environmentally safe, noncorrosive and whilst completely gentle for humans and animals, is deadly for a wide range of bacteria, viruses and fungi. Zoono Microbe Shield is water-based and does not contain alcohol. When applied to a surface it leaves behind a mono-molecular layer that permanently bonds to the surface. The product contains a molecule that, once dried and hardened, creates a surface of microscopic pins and needles that can pierce and destroy harmful organisms for up to 30 days between applications.