Seal Once Nano Poly Concrete & Masonry Sealer

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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 effluorescence, 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 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 & decay.

NANO+POLY is a water based, non-toxic, eco-friendly sealer that will not harm pets, plants or people.  It goes on milky white, dries clear and cleans up with soap & water.  It is a great investment to protect and extend the useful life of your concrete walkways, patio, pool deck, stamped concrete, bricks, or pavers. Not recommended for concrete driveways or garage floors.


  • Brick/Masonry
  • Bricks Pavers
  • Concrete Patios


  • Water-based, Ultra-Low VOC
  • Eco-friendly, Non-toxic, No Odor
  • Won’t harm people, pets or plants
  • Penetrates below the surface
  • Creates flexible, breathable barrier
  • Helps prevent freeze/thaw damage
  • Prohibits cracking, spalling & mold
  • Non-yellowing, Will not peel
  • Easy soap & water clean-up

Additional information

Weight 9 lbs
Dimensions 9 × 9 × 9 in

Quart, Gallon