HydroFort™ VB is a water-based epoxy vapour barrier for concrete and masonry affected by rising damp, hydrostatic pressure or moisture transmission. It can be applied to suitably prepared damp concrete and provides a moisture-control layer beneath compatible coatings and HydroFort™ PU waterproofing systems.
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HydroFort™ VB is a two-component water-based epoxy vapour barrier designed to control moisture transmission through concrete, masonry and other cementitious substrates.
The self-priming system provides excellent adhesion to properly prepared damp concrete and resistance to hydrostatic pressure greater than 40 metres. It helps control rising damp and efflorescence where residual substrate moisture could affect subsequent coatings or waterproofing systems.
HydroFort™ VB is low odour, low VOC and water-thinnable, with a long working time for practical roller or brush application. It is suitable for concrete floors and walls, masonry and plastered cementitious surfaces.
HydroFort™ VB can also be used as the moisture-control primer beneath HydroFort™ PU Polyurethane Waterproofing Membrane where concrete is damp or subject to moisture transmission.
Two-Component Water-Based Epoxy
Ensure the substrate is sound and free from dirt, oil, grease, laitance and other contaminants. Fill holes and non-structural cracks with a suitable two-component epoxy repair material before application.
HydroFort™ VB may be applied to suitably prepared damp concrete, but do not apply over saturated surfaces or standing water. On dry concrete, lightly mist the surface with clean water and allow it to become surface dry before application.
Mix Parts A and B thoroughly at a 1:1 ratio. Apply by brush or roller; a 270 mm microfibre roller with approximately 5 mm nap is recommended.
For the first coat, thin the mixed product with approximately 10% clean water. Apply the second coat undiluted. Apply two coats at approximately 7–10 m²/L, allowing 3–72 hours between coats. The finished system provides approximately 80–90 microns total dry film thickness.
Where HydroFort™ VB is used as a moisture-control layer, allow it to cure as specified before applying HydroFort™ PU Waterproofing Membrane or a compatible Fortis epoxy floor coating system.
Suitable Surfaces
Typical Applications
4 L, 10 L
What is HydroFort™ VB used for?
HydroFort™ VB helps control moisture transmission, rising damp and hydrostatic pressure through concrete and cementitious substrates before compatible coatings or waterproofing systems are applied.
Can HydroFort™ VB be applied to damp concrete?
Yes. It can be applied to suitably prepared damp concrete, but not saturated surfaces or areas with standing water.
Is HydroFort™ VB self-priming?
Yes. HydroFort™ VB is self-priming on suitable prepared cementitious substrates.
How many coats are required?
Apply two coats at approximately 7–10 m²/L. The first coat may be thinned with approximately 10% clean water and the second coat applied undiluted.
Can HydroFort™ VB be used under HydroFort™ PU?
Yes. HydroFort™ VB can provide the moisture-control layer beneath HydroFort™ PU where concrete is damp or subject to moisture transmission.
HydroFort™ VB - Technical Data Sheet
HydroFort™ VB Pt.A - Safety Data Sheet
HydroFort™ VB Pt.B - Safety Data Sheet
