Medium Chips aid in: • The prevention or to stop extreme fluid loss in porous geology consisting of boulder, cobble, gravel and sand lenses. • Fill large voids and porous regions within the excavation. The chips are manually pushed into voids by the drilling tool and immediately begin to swell to form a tight, flexible seal. • Provides a permanent, flexible seal, easily added during drilling and aids in shaft stability. Packaging: 50 lb bag/48 per pallet MSDS Sheets available upon request!