HydroBlock SB

Solventborne, hydrophobic impregnating agent.

  • Effective impregnation
  • Non film forming
  • Improves durability.
  • 4 m²/l
  • 8 m²/l

Solventborne, hydrophobic impregnating agent.

Product Features

HydroBlock SB is a transparent solventborne, hydrophobic impregnating agent that penetrates well into the substance and reacts chemically with the substrate. Very suitable for “tight” mineral surfaces. It creates a water repellent surface that prevents capillary penetration of rain and splashes of water into the structure. Allows water vapour coming from inside the structure to pass through. Reduces salts moving to the surface of the structure. Does not form a superficial film. Reduces the growth of algae, green discolouration and prevents frost damages.

Recommended Uses

Facades, floors in e.g. warehouses, roofs of fibre cement, concrete and clay, paving stones and other materials of mineral origin, such as bricks, sand-lime bricks, mortar, sandstone, granite, and mineral plaster/render.


4-8 m²/l The practical spreading rate depends on application method, form and surface of the material.



Application Conditions

The temperature must be between 5° C and 30° C and relative humidity <85 % RH.

Surface preparation

The surface must be totally dry, clean and absorbing to ensure good penetration. Clean the surfaces from dirt, dust and salts. Wash moldy, mossy and similar surfaces with with Iso A-Clean according to instructions.


First coat:

Soak the surface with HydroBlock SB till saturation point by spraying “wet on wet”. HydroBlock SB must be applied in 1 – 2 “layers” in order to obtain the best result. Avoid application of the product in presence of strong wind or rain as this may cause stains or blotches. A surface already treated with a water-repellent product will not allow the penetration of other impregnating agents (hydrophobic solvents). Liquid not absorbed can cause stains on the surface – these are very difficult to remove. Splashes, if any, must be wiped away from windows immediately. It is recommended to cover windows before applying HydroBlock SB. Newly plastered or rendered walls must be fully hardened and dry before the application of HydroBlock SB. Always make a test coat to ensure the compatibility of product and surface.

Maintenance Painting:

The maintenance treatment for a surface treated with Hydroblock SB is Hydroblock SB. The substrate must be adequately water absorbing and the possible earlier treatments can have an effect on the success of the treatment.


Avoid spillage into drains, water systems and soil. Destroy liquid waste according to the local regulations. Recycle or dispose of empty, dry cans in accordance with local regulations.

Effective impregnation

High “water-pearling” effect. Reduces salts moving to the surface of the structure.

Product usp1prof_img
Master solution

Non film forming

Allows water vapour coming from inside the structure to pass through. Does not form a superficial film.

Product usp2prof_img
Master solution

Improves durability.

Reduces the growth of algae and green discolouration. Prevents frost damages.

Product usp3prof_img
Master solution

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