Hydra-Block 1 Gallon Jug

 @ $46.45



Seal the walls and floors or your damp basement with Hydra-Block.  Water vapor and soil gasses such as radon and methane will not migrate through the concrete and into your home.  This improves the air quality of your home.

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

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

Coverage sq. ft./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

Materials to Use Hydra-Block On

  • Brick and masonry sealer
  • Concrete sealer
  • Concrete block sealer

Hydra-Block Benefits

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


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