RS Cleanroom Blue Sponge Mop Head. This blue foam mop head is produced from special, fine-pore polyurethane foam, perfect for cleaning and disinfecting within a cleanroom or other controlled environment. Features:. Excellent tear and abrasion resistance Can be used on walls and ceilings as well as floors Non-sterile (RS No. ; 8295332 8295332 ) and sterile by gamma radiation (RS No. ; 8295341 8295341 ) versions available Can be used with M01 polyester cover. Applications:. All cleaning or disinfecting applications that require low particle generation but high absorbency Ideal for use in cleanrooms, laboratories or other dust or dirt-free environments Pharmaceutical or biotechnological industries