We are offering biocide for mill sanitation. Olklin-ac-12 is highly effective quaternary ammonium compound based broad spectrum micro-biocide that can be effective in controlling the growth of algae, bacteria and fungi. The unique composition of olklin-ac- 12 is effective against both the gram positive and gram negative bacteria, as well as active against fungi. The result is that unusually low dosage levels of olklin-ac-12 are required to maintain control.