Bostik CGM 30618996 25 LB Dash Patch Floor Leveler & Wall Patch, Can Be Used With Joint Compound To Set Fast. A fast setting gypsum based skimcoat used in preparation of finished floor coatings. Can be used to smooth cracks, joints, or other imperfections in concrete, wood, vinyl, ceramic tile or other subfloor surfaces. Can also be used to repair walls and ceilings. Does not shrink. Versatile that can be used on virtually any substrate including walls and ceilings. Can be easily enhanced with the addition of PolyBond. Adhesive friendly – low alkalinity. No aggregate which allows for a true skimcoat. Fast drying. Contains no Asbestos or Formaldehyde.