POLYUREA

What is polyurea?

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Polyurea is a coating/elastomer obtained from the reaction product of an isocyanate component and a resin-blend component. The isocyanate may be aromatic or aliphatic in nature. It can be a monomer, a polymer, or any reaction variant of isocyanates — a quasi-prepolymer or prepolymer. The prepolymer or quasi-prepolymer can be made from an amine-terminated polymer resin or a hydroxyl-terminated polymer resin.

A sprayed protective coating based on polyurea has the following advantages:

 — Very fast reaction time

— Almost instant return to service

— Can be applied at temperatures from 1 °C to +50 °C

— Works in permanently dry conditions at temperatures from -30 °C to +100 °C

— High crack-bridging performance

— High chemical resistance

— High abrasion resistance

— The coating is UV-resistant but may gradually chalk under prolonged exposure

Application:

On concrete

  • Wear-resistant protective coating for industrial and production facilities
  • Waterproofing of buried structures built by the open method
  • Waterproofing of structures submerged in water
  • Waterproofing of walkways and balconies
  • Waterproofing of floors and car parks
  • Waterproofing of water storage tanks at power plants
  • Protection of secondary settling tanks
  • Chemical protection of tanks and channels at sewage and wastewater treatment plants

On steel

    • Wear-resistant coating for truck bodies
    • Waterproof and wear-resistant coating for steel structures 

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 The polyurea coating technology is not new. In fact, it has been used for almost three decades.
Currently, polyurea is more advanced than traditional coating systems and also has many advantages for the owner and contractor.

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Polyurea can be applied to many different substrates (concrete, metal, wood, etc.) over a wide range of temperatures and ambient humidity. Nevertheless, when using polyurea, as with other protective coatings, it is very important to prepare the surface properly and control quality during application.

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The main advantage of polyurea is its fast application, curing and attainment of its final characteristics. This makes it possible to return the facility to service or operation very quickly, without loss of income during downtime. Downtime for maintenance and coating of water tanks, car parks and chemical-storage reservoirs is very costly for the facility owner, since these facilities must be taken out of service while other coatings are applied and cured. 

Most industrial polyureas are sprayed under high pressure, making it a fairly fast process. Spraying polyurea allows a layer of the required thickness to be applied to the surface in one or several passes. Additional properties such as non-slip additives, surface textures, UV-resistant colours and even NSF characteristics for drinking-water tanks can be achieved by using appropriate additives in the polyurea components.

There are practically no coatings that can compare with polyurea, especially when it comes to achieving certain physical properties.