has been tested by The CERIB a recognized European testing laboratory, following standarized procedures and has been found to have a fire rating in excess of up to 12 hours at (17 cm= 6.8") thickness (these test results are available upon request). Two hour fire rating can be achieved with thickness as little as (7 cm=2.9"). Note: European test results are exclusive information, and are not available for Grupo Lezy´s marketing purposes. Independent U.S. laboratory test results on the mix designs will be available for future marketing will not burn, is not combustible, does expel toxic gases fumes or smoke european testing authorities have stated that is considered to be superior to normal concrete for fire resistence, even in reduced section thickness