PE-51 is a natural and neutral PH solution for maximum waste degradation on any surface. Our exclusive blends of bio-engineered good bacteria are radically different from other enzyme cleaners available. PE-51 is made from highly expensive live liquid enzymes, never from a powder. Our enzymes have the ability to withstand up to 200 degrees Fahrenheit. They are resistant to chlorinated products, disinfectants, bleach, and high acid or alkaline conditions. PE-51 is non-toxic and certified salmonella free, non-pathogenic and contains only the naturally occurring bacteria that reduce BOD (biochemical oxygen demand) and COD (chemical oxygen demand) 80% within 5 days. Will NOT corrode burn, dissolve or eat away the surface by chemical action like other cleaners. PE-51 will not hurt vegatation, real sod, plants and can help in the cleaning of natural or artificial wetland systems. PE-51 liquid has a shelf life of 30 years but the container will most likely not last that long!