DECOFLEX PU W is high quality, enduring, long lasting, elastic one component fluid designed for long-term hydro insulation surface protection (cold use/hardening).

Decoflex PU W contains water dispersible polyurethane resins with a wide and permanent elongation.

When applied, Decoflex PU produces hydrophobic, 100% water repellent and impeccable membrane (no expansion joints and cracks) that efficiently and durably protects new and old surfaces.

It is used for moisture protection (between tiles) in bathrooms, balconies, utilities …


  • Easy to use (ready-to-use)
  • Without unpleasant odor
  • Seamless membrane, no joints
  • Water resistant
  • Frost resistant
  • Foot traffic enabled on the waterproof surface
  • Mechanical properties remain unchanged in the temperature range from -20°C to +70°C.
  • Water vapour transmission
  • Easy to repair membrane damage (locally in a few minutes)
  • Hues: black, grey


Instructions for work: Decoflex PU W is delivered ready-to-use. To ensure optimal endurance and best final result proper preparation of surface is essential. Surface should be clean, dry and free from any dirt that could harm adhesion of the coating. Moisture content should not exceed 8%. New concrete surfaces require drying for at least 28 days. Old slack coating, dirt, grease, oil, organic substance and dust should be removed with sanding machine. Eventual irregularities on the surface should be smoothed. Remove all loose particles and dust that remained on the surface after sanding. Apply the required primer Decoprimer W to all surfaces (concrete, cement plaster, wood, asphalt, bitumen, metal, etc..) before coating with Decoflex PU.

Useful hint: Decoflex PU W can be used as a primer coating (when the surface is porous). When used as a primer it can be diluted with water in ratio 10-15%.

Warning: Do not wash the surface with water. When applying the first layer of coating on absorbent or fragile surfaces like concrete, cement screed, mortar, plaster, wood etc. … dilute Decoflex PU W with 15% of clean water.
Let the coating dry for 6-24 hours (depending on the temperature). Stir well before use.

Decoflex PU W can be applied with a roller or a brush. Make sure that the surface has been previously coated with Decoprimer W (or with diluted Decoflex PU W when dealing with porous surfaces).

After 6-24 hours (depending on the temperature), apply the second layer of Decoflex PU W coating.

For areas with high traffic, the third layer of coating can be applied. One layer of coating should not be more than 0.5 mm thick (dry film). Provided that tiles are to be laid on the last layer, quarz sand (0.4-0.8 mm granulation) should be sprinkled on a still wet last layer of coating before laying ceramic tiles. Coarser surface provides better glue adhesion to tiles.

Use Decolor sealant tape in joints between the wall and the floor, in corners, around chimneys, pipes, siphons etc. Place it to a still wet layer (between two layers) so that the tape is absorbed/, then coat the joint again. After that, the joint should be recoated again.

Decoflex PU W should not be applied at temperatures below 0°C, or when raining or freezing is expected in next 48 hours. Optimal working temperature is +5°C to +35°C. Lower temperatures slow down drying time, whereas high temperatures speed it up. High humidity can affect final appearance.

Coverage: 1.2 to 1.8 kg/m2, two or three layers on smooth surfaces at optimal conditions. Different factors, such as surface porosity, temperature, humidity or application method can change, i.e.affect the required amoun.


Packaging units:
Metal containers: 1 kg, 4 kg 15 kg, 25 kg

Keep in dry, closed and cool space, at temperature from +5°C to +30°C, protected from dampness, cold and direct sunlight.
Product must be kept in the original, closed manufacturer’s packaging marked with safety instructions, the name of the manufacturer, product name and serial number.


Brush, roller or airless spray.

Tools should be cleaned with water and a detergent immediately after use.



Hydro insulation

Decoprimer W

Water-based epoxy primer coat.

Decoflex PU W

Polyurethane fluid coating for hydro insulation.

Decoflex PU

Polyurethane fluid coating for hydro insulation.

Decolor tesnilni trak

Sealing-insulation tape for sealing joints in combination with hydro-isolation coatings.