CONmicSHIELD® is a unique solution designed to stop the corrosion before it begins. Incorporated into the concrete mix like any liquid additive CONmicSHIELD® is a highly charged cationic polymer that is dosed directly into the concrete at the time of production. The concrete structure becomes inhospitable for bacteria and reduces their ability to convert the H2S (hydrogen sulfide gas) into H2SO4 (sulfuric acid). Since it is not a surface treatment, it cannot wash off, chip off, delaminate, or disbond. The protection is permanent and lasts just as long as the concrete.