GROUT-WELL® and GROUT-WELL® DF are one step bentonite grouting materials designed to achieve low permeability seals in water wells, monitor wells, geotechnical borings, and heat pump holes. They achieve a range of solids contents, 17% to 20% solids by weight and are NSF approved. GROUT-WELL® DF's granular nature reduces dusty conditions during mixing operations. Wyo-Ben, Inc. Card No. 321