Legacy Industrial's HD6600-MMA™ Concrete Sealer is a "best in class" 30% solids methyl methacrylate that provides a high performance, fast drying, non-yellowing, sealer for indoor and outdoor concrete applications. HD6600-MMA™ can be considered the ultimate multi-use concrete sealer that has better chemical, weatherability and wear resistance compared to most solvent and water based acrylic sealers that are commonly used in the industry. Use this product for exterior and interior applications. NOTE: THIS IS AN IMPROVED VERSION OF HD6525-MMA™and is compatible with HD6525-MMA™. Want a matte finish for an interior floor? Add a coat of our cherry-wax in matte (improves performance too).