Acrylic based flexible vapor proof protective coating


Polycryl FR is a an acrylic based single component, class A fire-rated protective coating especially designed as moisture vapor barrier on facades application.


  • Class A fire rated (0,10)
  • Environmentally friendly. Low VOC (<10 g/L)
  • Excellent UV, weatherability & color retention properties
  • Single component. Easy to use
  • Cold applied
  • Excellent resistance to vapor and moisture
  • Excellent resistance to carbon dioxide diffusion
  • Excellent resistance to chloride ion penetration
  • Breathable
  • Good abrasion resistance properties
  • Heat resistant
  • Excellent adhesion on most porous and nonporous substrates

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 like dust, traces of curing compound, oil and grease. 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* concrete repair mortar.


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  FR 1 to 1 with water. The primer should be applied at a coverage rate of 4-5m2/L. On horizontal surfaces Polycryl FR can be applied directly without primer provided that recommended surface preparation has been carried out.


Polycryl FR 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.


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 a nonwoven 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 should be applied @1.1 L/m2/coat for a DFT of 1.5mm in 2 coats. As a protective coating, vapor barrier on concrete/render/ plaster surfaces, the coating should be applied @0.70 L/ m2/coat for a DFT of 1mm in 2 coats.