Paint Shield is an EPA-registered microbicidal paint that continuously kills harmful bacteria on painted surfaces. The interior latex paint kills greater than 99.9 percent of Staph (Staphylococcus aureus), MRSA (Methicillin-resistant Staphylococcus aureus), E. coli (Escherichia coli), VRE (Vancomycin-resistant Enterococcus faecalis) and Enterobacter aerogenes within two hours of exposure on a painted surface, and it continues to kill 90 percent of these bacteria even after repeated contamination on painted surfaces, according to the company. The effectiveness lasts for up to four years as long as the integrity of the surface is maintained.