XL-CHEM-F is a specially formulated 100% solids epoxy grout and rebuilding product for filing holes and rebuilding severely chemically attacked concrete floors and secondary containment areas. XL-CHEM-F provides an excellent base for other products, such as XL-CHEM-C, XPL-2721, XPL-4520 etc., where more acid resistance or a smoother finish is required.