TRU-BORE from Wyo-Ben Inc. is a highly concentrated bentonite-based drilling fluid designed for difficult drilling operations in both vertical and horizontal borings. It is non-toxic and environmentally safe. Its fast-hydrating formula allows contractors to mix fast and build viscosity quickly. TRU-BORE stabilizes formations ranging from moderate clay soils to high concentrations of sand. Wyo-Ben Inc., Card No. 203