Gunk GS-4 GreenSorb GUNK is a local family owned company based out of Charlotte, NC. For more than 75 years, GUNK products, developed by the people who use them, has earned the trust of hard-working tradesment and the active DIYer through consistent, superior performance and a commitment to innovation. Absorbs medical and lab fluids, toxins, bodily fluids, alcohols, paint and sewage Use in wet, dry, inside and outdoor conditions Non-leaching, more than 99 percent retention Changes hazmat liquids to dry solid waste