A-Tech Hydra-Block

From: $50.00 USD

  • Reduces basement dampness
  • Improves basement air quality
  • Stops water vapor transmission
  • Lowers soil gas transmission
  • Reduces radon gas transmission
  • Hardens brick and concrete surfaces
  • Eliminates brick and concrete dusting


  • Water-based
  • Substrate traction remains the same
  • No appearance change
  • Chemical bond to substrate
  • 100% Vapor impermeable

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Interior Basement Floor and Wall Sealer

Improve the air quality of your home by stopping radon and methane gas, water vapor and water from migrating into your basement. Seal the walls and floors with Hydra-Block for permanent protection.

Penetrating water-based formula leaves no surface film. The appearance of the substrate will not change. The color and sheen will remain.

Ready to use. Do not thin. Apply with brush, roller or sprayer.

Materials to Use Hydra-Block On

Brick and masonry sealer
Concrete sealer
Concrete block sealer

Application & Coverage

Coverage Per Gallon:

Clay brick                                  150-200

Stucco, Rough Stone                    100-200

Concrete                                   150-200

Precast Concrete                         150-200

Concrete Block                            100-140

Where to Use

  • Interior concrete walls and floors
  • Interior brick and masonry