Ecolab® Ultrasil™ 67 is a neutral, enzymatic liquid cleaner. It is designed for use with an Ultrasil membrane approved alkaline cleaner as a two-part cleaning program for reverse osmosis, nanofiltration, ultrafiltration and microfiltration membrane systems. Ultrasil™ 67 helps rapidly remove fatty soils as well as penetrate and break down proteins. It is compatible with most commonly used membranes including: polysulfone, fully aromatic polyamide, polyacrylonitrile, polyvinyl difluouride, polypiperazine amide, polypropylene, polyether urea, aluminum oxide, zirconium dioxide, and electrodialysis membranes. This product is not intended to be used with cellulose acetate membranes, as they may be irriversibly damaged.