Ashford Formula is a chemically reactive liquid that penetrates the concrete, solidifying the concrete surface components into a solid mass.It produces a permanently denser, harder, penetration and abrasion-resistant concrete surface. Ashford Formula is inorganic, nontoxic, VOC free, colorless and odorless. Ashford Formula, the leader in concrete densification since 1949, is a transparent, chemically reactive, water-based sealer that penetrates concrete and masonry building materials, protecting, preserving and strengthening them permanently.