LastiSeal is a water-based, polyester-polymer and polyurethane sealer for brick, concrete, pavers, stones, mortar and other porous masonry. LastiSeal penetrates up to 4 in. and fills the pores, bonds the substrate and cures as a hard plastic below the surface. Unlike paints or surface sealers, LastiSeal will not change the appearance or feel or your brick, concrete or masonry. LastiSeal does not form a surface film and will not leave a gloss finish or color on the surface. Once cured (24 hours), the seal is practically permanent. Seal brick walls and floors, indoors and outdoors, basement concrete, outdoor concrete, pavers, driveways, pool-decks, patios, stones, tiles, grout, water-features and porous stone. Non-toxic, non-flammable and non-hazardous. No odor. Ultra-low VOCs. Not harmful to plants. Protects against: Freeze-thaw damage, wind-driven rain, negative side water pressure, spalling, spills, mold, algae, humidity and efflorescence. Approx. coverage per 5 Gal. pail: Bricks - 800 sq. ft. to 1,000 sq. ft., Poured Concrete - 1,000 to 1,2000 sq. ft. More porous surfaces may require a light second application. Color: Clear/Matte.