Reusable – exchange resin

QLEEN sets are filled with a “reusable exchange resin”. We can always regenerate this resin. There is no waste and is therefore sustainable. QLEEN eco. As a manufacturer, we thus contribute to climate protection.

Cleaning with the power of pure water

All QLEEN systems work with the proven water treatment technology PURAQLEEN, which completely demineralizes normal tap water and converts it into lime-free, powerful “pure” water.
The mixed-bed resin granulate is used here. We can insure 90% of the regenerated yield compared to new resin.

Use the form of sustainability and do your part to protect the environment. 


  • Founded in 1895
  • Owner-managed company – today in the 5th generation
  • Headquarter in Neustrelitz, Mecklenburg Vorpommern


  • More than 100 years of know-how in window leather
  • Pioneer in the development of efficient and ergonomic cleaning methods


Hanns Joachim Supthut, Shareholder.


“We support our customers in implementing sustainable cleaning concepts – with efficient systems and solutions that reduce the consumption of water, energy and cleaning agents. With our products and innovations, we make an effective contribution to making daily cleaning work even safer and more productive.”

Lehmann outdoor and indoor cleaning solutions are used successfully worldwide. Convincing products and systems. MADE IN GERMANY.