Clean + Disinfect + Protect. Traditional disinfection kills germs, but surfaces become re-contaminated quickly upon human contact. Applying Clearstream's Penetrexx or Biotrexx antimicrobial surface protectors, make the surface resistant to the growth of bacteria and other microorganisms that can cause human illness. One application creates an invisible shield that independent studies have shown is effective against microbial attack for 30 days or more!! Perfect for schools, hospitals, hospice and long-term care, offices, vehicles, equipment, factories, warehouses and more.