More than 99% in first 24 hours of contact. Eventually, all microbes that come into its contact will die. GFT kills over 1000 types of bacteria and fungus. Germ Free Tiles from Orientbell have been tested as per Japanese Industrial Standard (JIS Z 2801:2010). This standard includes tests effectiveness against 2 most dangerous strains of Bacteria – Escherichia Coli (E. Coli) and Staphylococcus Aureus and OBL GFT has passed this test. is a perfect shield against all these harmful microbes.