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Sealed Microdur Plus microcement in the lounge at Maysan, LXR Doha
Primers and sealers — technical data

Maxipur 100%

Two-component polyurethane sealer — gloss, satin, matt

Manufacturer Cemher
Country of origin Spain
System family Primers and sealers
Supplied and applied by Conmarble Natural Finishes

The product

The solvent-based sealer for the Cemher systems: a two-component aliphatic acrylic polyurethane with high chemical resistance, in gloss, satin or matt. The recoat window is 4 hours to 3 days — miss it and the surface has to be abraded.

Where it is used

  • Sealing microcement and lime plaster systems
  • Metals and multiple other substrates
  • Areas requiring high chemical resistance

Substrates

  • Microcement and lime plaster, hardened and below 5% moisture
  • Metals
  • Multiple mineral substrates

Application data

Coverage, thickness, mix and cure, as declared by the manufacturer. Site conditions in the Gulf sit at the top of most of these ranges — allow for it in the programme.

Type Two-component aliphatic acrylic polyurethane varnish
Appearance Gloss, satin or matt
Consumption 8 – 9 m²/L
Touch dry at 23 °C 4 hours
Total drying at 23 °C 24 hours
Recoat 4 hours minimum, 3 days maximum
Workability at 20 °C Approx. 2 hours
Operating conditions 12 – 25 °C, relative humidity below 80%
Minimum application temperature + 10 °C
Packaging Comp A 4 L, in matt, satin or gloss
Shelf life 24 months from manufacture, stored correctly

Performance data

Every figure below is reproduced from the manufacturer's own technical data sheet, with the test standard it was measured against. The sheet itself is in the download section.

Property Result Standard
Chemical resistance High resistance to chemical agents Cemher data sheet
Drying behaviour Lower temperatures and higher humidity extend drying Cemher data sheet

Where not to use it

The limits are as much a part of the specification as the performance. Everything here is stated on the manufacturer's data sheet.

  • Solvent-based — specify Aquamax where a water-based sealer is required
  • Operating range 12 – 25 °C with relative humidity below 80%
  • Minimum application temperature +10 °C
  • Do not apply until the finish is below 5% moisture, measured by meter
  • Maximum recoat interval 3 days
Specification clause

Sealer: Cemher Maxipur 100% two-component aliphatic acrylic polyurethane in [matt / satin / gloss], applied at 8–9 m²/L in [two] coats to the finish scheduled. Applied only when substrate moisture is below 5% measured by meter, at 12–25 °C and relative humidity below 80%. Recoat interval not less than 4 hours and not more than 3 days.

Square brackets mark the choices that belong to the project. Send us the finishes schedule and we will return the clause completed, with the sample and mock-up programme against it.

Documents

Every document is the manufacturer's own, reproduced in full and unaltered under our cover. Free to download, no form.

The rest of the primers and sealers range

Primer 100 Water-based adhesion promoter AURO Plaster Primer No. 301 Plaster primer

Technical support for the design team

We supply the material and we apply it, so the specification and the workmanship sit with one party. Send a finishes schedule, an elevation or a mood board and we will come back with the system, the build-up, the sample programme and a completed clause.

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