Method and composition for sealing a borehole. A chemically bonded phosphate ceramic sealant for sealing, stabilizing, or plugging boreholes is prepared by combining an oxide or hydroxide and a phosphate with water to form slurry. The slurry is introduced into the borehole where the seal, stabilization or plug is desired, and then allowed to set up to form the high strength, minimally porous sealant, which binds strongly to itself and to underground formations, steel and ceramics.
STATEMENT REGARDING FEDERAL RIGHTS
This invention was made with government support under Contract Nos. W-7405-ENG-36 and W-31-109-ENG-38 awarded by the U.S. Department of Energy. The government has certain rights in the invention.