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    Filling large voids requiring a rather limited load-bearing capacity is most efficient and economical by using a highly expansive hydro-insensitive polyurethane foam.

    AP FILL 2-component polyurethane resin with expansion

    capacity up to 35 times its original volume was specifically developed for filling large voids or disused structures, pipes, mine shafts and tunnels.

    The 2-component PU foam fits seamlessly due to its good adhesion to soil and concrete.