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COSMO AF is a simple and economic solution for waterproofing and protection. It is a one component , low viscosity , polyurethane fluid which cures with the humidity in the atmosphere to produce a highly elastic membrane with strong adhesion to many types of surfaces.

It is based on pure elastomeric hydrophobic polyurethane resin plus special inorganic fillers, which result in excellent mechanical, chemical , thermal , UV and natural element resistance properties.

Apply with brush, roller or airless spraying in two coats. Minimum total consumption: 1.2-1.5 kg/m2


CE:ETA-04/0082. See table below


Waterproofing and protection of :

  • Gypsum and cement boards ,
  • Tiles (under) ,
  • Bathrooms ,
  • Roofs ,
  • Light roofing made of metal or fibrous cement ,
  • Asphalt membranes.
  • As the main waterproofing membrane in car park waterproofing systems.

25 kg .


Not recommended for:

  • Unsound substrates ,
  • Waterproofing of swimming pool surfaces in contact with chemically treated water.
  • When used in dark colours for exposed use, a protective topcoat of COSMO TOP COAT 440 (always pigmented) is required.
  • No thinning is required but pure xylene may be used.
  • Excellent weather and UV resistance. The white colour reflects much of the solar energy and so reduces the internal temperature of buildings considerably.
  • Excellent thermal resistance, the product never turns soft. Max service temperature 80 oC, max shock temperature 200 oC.
  • Resistance in the cold: The film remains elastic even down to – 40 oC.
  • Excellent mechanical properties.
  • Good chemical resistance.
  • Non-toxic after full cure.
  • Water vapor transmission:The film breathes so there is no accumulation of humidity under the coat.
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