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Pool waterproofing membrane. ACTFLEX 988 CWP on site.

1 min readFORSPEC Technical Team

The short version

  • A concrete pool coated in ACTFLEX 988 CWP: floor, walls and steps.
  • ACTFLEX 988 CWP is a Class II cementitious membrane for the positive or the negative side.
  • It normally needs no primer on sound concrete and is recoated after 4 to 6 hours.

ACTFLEX 988 CWP is the FORSPEC membrane for structures that hold water or hold it back: pools, tanks, lift pits and basement walls.

The figures

Class
Class II
Primer
Normally none on sound, prepared concrete
Recoat
After 4 to 6 hours
Water pressure
350 kPa (typical FORSPEC value)
Fill
At least 10 days after the final coat

Stop any running water with ACTFLEX HYDROPLUG first. The membrane goes on in three coats to 1.5 mm, as shown in a pool detailed the right way.

FORSPEC on Instagram · 4 Nov 2026ACTFLEX 988 CWP in a concrete poolLoads when you tap

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Systems, products and drawings

SystemPools, Tanks & Water-Retaining StructuresThe full build-up, layer by layerProductACTFLEX 988 CWPTwo-part cementitious acrylic membrane for basements, tanks and pools that applies to damp cured concrete, normally without primer.ProductACTFLEX HYDROPLUGRapid-setting cementitious plugging compound that seals flowing water leaks in concrete and masonry under pressure.RangeAll FORSPEC productsBy system, with data sheets and calculators
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On site with FORSPEC

A lift pit lined before the pour, from FORSPEC on InstagramA lift pit lined before the pourThe membrane under the screed, from FORSPEC on InstagramThe membrane under the screedA pool detailed the right way, from FORSPEC on InstagramA pool detailed the right wayPipe details welded into the sheet, from FORSPEC on Instagram▶ 3.2KPipe details welded into the sheet
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