Key Facts

Polycryl PF

Single component, acrylic waterproofing and protective coating

Properties

  • Excellent UV, weatherability & color retention properties
  • Single component. Easy to use
  • Excellent resistance to water and moisture
  • Breathable
  • High solar reflectance
  • Environmentally friendly. Low VOC (<10 g/L)
  • Excellent adhesion on PU Foam and most porous
  • substrates

Polycryl PF is a single component, acrylic waterproofing and protective coating especially designed for PU Foam on roof applications. Polycryl PF upon curing forms a tough, flexible and durable coating which is resistant to UV and other weathering agents, due these factors the coat will be perfect bonded to PU Foam surface, representing the safest option for both permanent and temporary exposed roofs

This TDS is applicable for the United Arab Emirates only. Please contact your local Polybit sales office for the available TDS in your region

Step by Step

Surface preparation

The surface shall be cleaned thoroughly of all contaminants. For concrete substrate, impurities like dust, traces of curing compound, oil and grease shall be cleaned thoroughly. Light mechanical grinding/grit blasting/high pressure water jet may be used to clean the surface of all the contaminants depending on the degree of contamination on the surface to be coated. All surface imperfections and protrusions shall be removed and repaired. Structurally unsound and friable concrete must be removed and repaired with a suitable Polycrete* range concrete repair mortar.

Priming

On horizontal surfaces Polycryl PF can be applied directly without primer provided that recommended surface preparation has been carried out. A primer coat is recommended, particularly on the vertical surfaces to seal the pores and stabilize the surface. The primer coat can be made in the site by diluting the Polycryl PF 1 to 1 with water. The primer should be applied at a coverage rate of 5m²/L. Allow the primer to become dry (approx. 30 minutes at 23°C 50% RH) prior to the application of the top coating. On horizontal surfaces Polycryl PF can be applied directly without primer provided that recommended surface preparation has been carried out. Primer coat is not required when applied as a protection coating for PU Foams.

Mixing

Polycryl PF is single component but stirring of the pail is recommended prior to the application of the coating. This will remove any sediment which may occur during storage. The use of a slow speed drill and suitable paddle should be used in order to avoid the formation of air bubbles.

Application

Apply the coating with a brush, roller or airless spray. Allow the coating to dry completely before applying the subsequent coats. 2 coats should always be applied; the second coat at 90° to the first. We recommend that Watertite CL 252 /a non-woven geo-textile membrane be embedded into the first coat whilst it is still wet at all expansion joints projections and corner fillets to reinforce these areas. Allow the final coating to cure fully (72 hours) after which it can be put in service. For roof applications, the coating shall be applied @0.85 L/m²/coat for a DFT of 1.0mm in 2 coats.

 

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