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Everflex VBS Water-based Epoxy PrimerVendor:
Everflex VBS is a two-part, water-based epoxy primer and moisture-vapour barrier for concrete, screeds and suitable masonry substrates. It helps prepare slabs and other mineral surfaces for compatible waterproofing membranes, flooring adhesives and coatings where residual substrate moisture could compromise the finish. VBS has...- $440.44
- $440.44
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- per
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Megapoxy 154Vendor:
Megapoxy 154 is a water-based epoxy primer and sealer for concrete and masonry, including suitably prepared damp or green concrete. It seals porous surfaces and forms a tough, matt finish, making it particularly useful when preparing a slab for a flooring system.Prime damp slabs...- $700.00
- $700.00
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Gripset Xpress Primer H2O Plus PrimerVendor:
Gripset Xpress Primer H2O Plus is a one-component vapour-barrier primer for damp or green concrete and other mineral substrates before compatible waterproofing membranes and coatings. It controls residual substrate moisture that could otherwise cause an overlaid membrane to blister or lose adhesion, without changing...- $389.93
- $389.93
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Gripset E-60 Epoxy PrimerVendor:
Gripset E-60 Epoxy Primer is a two-component water-based epoxy primer and moisture barrier for damp or green concrete, masonry, screeds and other suitable mineral substrates. It is designed to manage residual substrate moisture and specified negative-side hydrostatic pressure before compatible waterproofing membranes, tile adhesives...
- From $106.24
- From $106.24
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RLA Moisture Seal PrimerVendor:RLARLA Moisture Seal is a two-part water-based epoxy coating used to control moisture movement through prepared concrete and compatible mineral substrates before installing suitable floor finishes, levellers or waterproofing systems. Choose it where ordinary acrylic primer does not address the moisture conditions. Its effectiveness...
- $459.03
- $459.03
- Unit price
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EPOCOTE™ F100W Epoxy Primer – Clear or Grey - GreyVendor:
EPOCOTE F100W is a two-part, water-based epoxy primer and sealer available in Clear and Grey. Use it on prepared damp or green concrete with up to 10% moisture content before compatible waterproofing systems. Prime damp and green concrete EPOCOTE F100W promotes adhesion for specified...- From $471.81
- From $471.81
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Grey
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Clear
Frequently Asked Questions
What is the difference between a moisture-barrier primer and a regular primer?
A moisture-barrier primer blocks water vapour and hydrostatic pressure from the substrate. A regular primer improves adhesion only. Moisture-barrier primers use two-part epoxy chemistry and need a minimum dry film thickness to perform.
Which moisture-barrier primers resist hydrostatic pressure?
Ardex WPM 300, Gripset E-60, RLA Moisture Seal, and Everflex VBS all resist hydrostatic pressure up to 25 metres of water head. Gripset H2O Plus and Mapeproof 1K Turbo manage vapour transmission only and are not rated for hydrostatic conditions.
Can I use a single-component moisture-barrier primer?
Yes. Mapeproof 1K Turbo is a single-component polyurethane that tolerates substrates up to 95% relative humidity. Gripset H2O Plus is another single-component option with a colour-change drying indicator. Both suit vapour control but not hydrostatic pressure.
How thick does a moisture-barrier primer need to be?
Most two-part epoxy moisture-barrier primers need 300 microns dry film thickness across two coats. The first coat often accepts water dilution for penetration on porous substrates. Sand-seed between coats for tiling or screeding over the barrier.
Are any moisture-barrier primers trafficable?
Yes. Megapoxy 154 is the only trafficable moisture-barrier primer here. It supports foot traffic and light vehicles once cured. It is a two-part epoxy that also works as a dust sealer. It does not bridge cracks and yellows under UV.