MasterProtect H 303

Clear water repellent based on alkyl alkoxysilane for the protection of concrete surfaces - BD 43/03 compliant

What is MasterProtect H 303?

MasterProtect H 303 is a single component clear, deeply penetrating water repellent used to protect both vertical and horizontal concrete surfaces from deterioration by atmospheric pollution, salt attack and freeze thaw cycles etc.

What is MasterProtect H 303 used for?

MasterProtect H 303 is used to protect vertical and horizontal concrete surfaces such as buildings, bridges, highways, concrete barriers, car parks, sports stadia and cooling towers etc.

What are the benefits of MasterProtect H 303?

  • MasterProtect H 303 provides a long-lasting protection: by penetrating deep into the surface acting as a water repellent that prevents water, salts (chloride ion), atmospheric pollution and freeze/thaw cycles from deteriorating the concrete.
  • Improves the aesthetics by reducing efflorescence, algae growth and dirt build-up.
  • Surface appearance remains unchanged.
  • Reduces volatile organic emissions into the atmosphere in comparison with today’s commonly used organic-solvent-based repellents.
  • Provides a safer working environment for the applicator by minimising health hazards associated with organic solvents.
  • Ready for use; no dilution on site, which means constant quality.
  • One coat, no primer.
  • Masking window plate glass is not necessary before spray application.
  • May be applied to damp substrates.
  • Application equipment easily cleaned with soapy water.
  • Virtually no product evaporates during spray application, therefore more active silane can reach its intended target, so minimising wastage and maximising coverage.

Direct contact

Chris Gallivan

Product Manager

+44 7966123422


MasterProtect H 303: Declaration of Performance

pdf (40.42 Kb)

MasterProtect H 303: Technical Data Sheet

pdf (109.47 Kb)