VARNISH-PU 650 MF

VARNISH-PU 650 MF is a one-component, transparent, aliphatic, polyurethane coating used for a satin-matt finish over ISOFLEX-PU 650. VARNISH-PU 650 MF is a watertight, elastic and shows excellent resistance to mechanical and chemical loads. Being UV-stable, it features non-yellowing properties. Consists of high-quality elastomeric and hydrophobic resins, which help maintain its transparency and elasticity in the long term. The system of ISOFLEX-PU 650 and VARNISH-PU 650 MF offers the following advantages:

  • Easy application
  • Effective waterproofing and protection of surfaces covered with tiles
  • Continuous membrane, without seams or joints
  • Stability to UV radiation
  • Resistance to weather conditions (rain, frost)
  • Resistance to detergents, oils and sea water
  • Resistance to pedestrian traffic

The system of ISOFLEX-PU 650 and VARNISH-PU 650 MF is ideal for waterproofing and protection of:

  • Flat roofs, terraces and balconies covered with glazed tiles, ceramic tiles, natural stone, wood, microcement coating, screeds, etc.
  • Walls made of glass bricks, natural stone, etc.
  • Skylights, atriums and greenhouses made of glass, plastic materials (polycarbonate sheets), etc.

Substrate
The substrate must be completely dry, vlean, free of grease, loose particles, dust, old paints, etc. Surfaces with trapped moisture must be left to dry completely prior to application of ISOFLEX-PU 650.
1.1. Non-porous surfaces should be treated with the special adhesion promoter PRIMER-S 165. The surface is cleaned with a cloth that has been soaked with the promoter. The cloth must be frequently changed. The first layer of ISOFLEX-PU 650 is applied 20-30 min after the application of PRIMER-S 165. The adhesion promoter cleans the surface and increases the bond strength of ISOFLEX-PU 650. PRIMER-S 165 should not be applied to transparent plastic materials (e.g. polycarbonate sheets).

1.2. Porous surfaces should be primed with PRIMER-PU 150. PRIMER-PU 150 is thoroughly stirred and uniformly applied to the substrate by brush, roller or spray. The first layer of ISOFLEX-PU 650 is applied 3-4 hours after the application of PRIMER-PU 150.

Application of ISOFLEX-PU 650
ISOFLEX-PU 650 should be slightly stirred before application. Excessive stirring should be avoided in order to prevent air entrapment in the material. ISOFLEX-PU 650 is applied by roller in 2-3 layers. Each subsequent layer follows afterr 12-18 hours, depending on the weather conditionsand not later than 24 hours. 

Application of VARNISH-PU 650 MF
VARNISH-PU 650 MF is applied at least 12 hours after the application of the final layer of ISOFLEX-PU 650. Before application, it is recommended to slightly stir VARNISH-PU 650 MF. Extensive stirring should be avoided to prevent air entrapment in the material. VARNISH-PU 650 MF is applied by roller in one layer.
VARNISH-PU 650 MF is supplied in tin buckets of 4 kg. 9 months from date of production if stored in original, unopened packing, in a frost-free and dry place. Recommended storage temperature between +5oC and +35oC.

  • Surfaces that have been treated in the past with hydrophobic impregnations might show adhesion problems. It is recommended to perform a trial application first, in order to check the compatibility of the substrate.
  • VARNISH-PU 650 MF is not suitable for contact with chemically treated water of swimming pools.
  • Low temperatures retard the curing of ISOFLEX-PU 650 and VARNISH-PU 650 MF. High temperatures accelerate the curing of ISOFLEX-PU 650 and VARNISH-PU 650 MF.
  • For application to polycarbonate sheets, please consult the Technical Support Department.
  • Temperature during application and hardening should be between +8oC and +35oC.
  • Unsealed packaging shall be used at once and cannot be restored.
  • VARNISH-PU 650 MF is intended for professional use only.
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Surface: Glazed tiles, ceramic tiles, wood

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Application: Roller