Concrete & Masonry Sealer Stops Radon & Water Vapor
Hydra Block Seals Concrete and Masonry from Water Vapor and Soil Gasses
Hydra Block is a water-based concrete and masonry penetrating sealer that is vapor impermeable. The product penetrates below the substrate's surface and reacts with the free lime content to fill the microscopic pores. This hardens the surface and makes it impermeable to water, water vapor and gases such as radon. Dusting from the concrete or masonry will be reduced or eliminated.
Sealing the interior walls and floors of a basement will greatly reduce the humidity and dampness in a basement. Reducing the humidity makes for a better environment with reduced musty odors and dampness.

Easy Application:
Apply to bare, unsealed, unpainted concrete or masonry. Adhesives, dirt, oil, grease, paint or any other substance that will prevent the sealer from soaking into the substrate must be removed prior to application.
Where to Use:
- Interior concrete basement walls and floors
- Interior masonry
- Interior concrete block walls
Suitable Substrates:
- Concrete
- Concrete block
- Brick and masonry
Features:
- Vapor impermeable
- No substrate appearance change
- Water-based formula
- Low VOC content
- Horizontal and vertical applications
- Paintable after curing
Benefits:
- Reduces basement dampness
- Lowers radon transmission
- Improves basement air quality
- Stops water vapor transmission
- Hardens brick and concrete surfaces
- Stops gas and vapor transmission
- Dusting is prevented
100% Vapor Impermeable
Hydra-block is 100% vapor impermeable barrier. Liquid water, water vapor and soil gasses such as radon will not be able to move through the substrate. When used on the interior of a building, the humidity that arises from water vapor transmission will be reduced. The dampness and musty odor of basements new and old will also be reduced.
FREE SHIPPING to 48 STATES on PAILS
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.
Apply to bare, unsealed, unpainted concrete or masonry. Adhesives, dirt, oil, grease, paint or any other substance that will prevent the sealer from soaking into the substrate must be removed prior to application.
Coverage
100-200 sq. ft./Gallon
Features:
- Vapor impermeable
- Lowers soil gas transmission
- Reduces radon gas transmission
- Paintable after curing
- No substrate appearance change
- Water-based formula
- Low VOC content
- Horizontal and vertical applications
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.
Apply to bare, unsealed, unpainted concrete or masonry. Adhesives, dirt, oil, grease, paint or any other substance that will prevent the sealer from soaking into the substrate must be removed prior to application.
Coverage
100-200 sq. ft./Gallon
Features:
- Vapor impermeable
- Lowers soil gas transmission
- Reduces radon gas transmission
- Paintable after curing
- No substrate appearance change
- Water-based formula
- Low VOC content
- Horizontal and vertical applications
2 Gallon Hand Sprayer
Professional grade pump up hand sprayer to apply A-Tech Hydra-Block
- Polyethylene construction
- Fan pattern spray tips for even application
- 1/4, 1/3, 1/2 gpm nozzles
- Lock in place spray guard to protect siding
- Wide funnel top
- 2 gallon usable capacity
1 Gallon Hand Sprayer
Professional grade pump up hand sprayer to apply A-Tech Hydra-Block
- Polyethylene construction
- Fan pattern spray tip for even application
- 1/4 gpm nozzle
- Wide funnel top
- 1 gallon usable capacity