Seal-Once Nano+Poly Matte Clear Water-Based Concrete and Masonry Sealer 1 gal, Pack of 4

SEAL-ONCE® NANO+POLY Concrete & Masonry Sealer combines proprietary nanotechnology with the strength of polyurethane to provide 360° of protection. NANO+POLY penetrates below the surface to protect against water damage from the inside-out. It forms a long-lasting water-resistant shield within the capillaries of concrete and masonry, preventing efflorescence, cracking, spalling, mold and mildew growth, lime bloom and freeze/thaw damage. In addition to penetrating to coat the pores of the concrete, NANO+POLY creates a durable surface coating that protects against UV fading, wear and tear and water damage. It creates a UV-stable, non-yellowing coating that preserves the natural color of the concrete and resists weathering and decay.