Remove traces of rust, lime scale and mineral deposits in a controlled manner without unnecessarily attacking the concrete.
Betonreinigung
Rust and limescale efflorescence can only be removed with acidic cleaning products. Acidizing is a chemical process used to remove cement residue, chalk and rust stains. This process can be used to achieve color fastness, particularly with colored exposed concrete.
Here, too, it is recommended to treat cleaned exposed concrete surfaces with a concrete protection so that no pollutants can penetrate the concrete and the surface remains clean and beautiful at the same time.
At a glance
Concrete cleaning against rust and limescale removes mineral deposits and discoloration from concrete surfaces in a controlled manner. The aim is to clean without unnecessary traces of attack on the concrete.
Suitable for administrations, builders and those responsible for maintenance of exposed concrete, facades, stairs, bases and technical concrete surfaces.
Water flow, metal parts, efflorescence or construction deposits cause visible traces.
BKOS tests suitable cleaning methods and adapts chemistry, mechanics and exposure time to the concrete.The surface becomes cleaner without uncontrollably roughening the concrete.
Leaking connections, water courses or corroding metal parts cause new deposits.
BKOS points out recognizable causes and coordinates cleaning and possible protective steps accordingly.Cleaning is not isolated but planned in the context of the cause.
Your property
Send us photos or project details. We will assess the most suitable method.
Cleaning must always be checked on the sample. Processes that are too aggressive can open pores, change the color or compromise protective systems.
BKOS works throughout Switzerland for private, commercial and public construction projects. The deployment planning depends on the object, surface, access and appointment window.
Winterthur / Zuerich / Lachen / Deutschschweiz / Schweiz
Practical expertise
BKOS assesses cleaning, concrete cosmetics and subsequent protection together so that cleaned surfaces function better in the long term.
Content reviewed on 17.06.2026.FAQ
Rust can be caused by metal parts, runoff water or iron-containing entries. Traces of limescale and efflorescence are often caused by moisture, waterways and mineral deposits.
Uncontrolled acid can attack cement paste, roughen the surface and change the color. BKOS carries out preliminary tests and adjusts the means, concentration, exposure time and neutralization to the concrete.
Fresh superficial deposits are usually easier to treat than deeply embedded or long-standing discolorations. The realistic result is assessed based on a sample cleaning.
Yes, if the cause such as water flow, corroding metal or permanent moisture persists. A sustainable solution combines cleaning with root cause elimination and, if necessary, a protection system.
For absorbent and contaminated surfaces, coordinated protection can reduce renewed contamination. Whether it makes sense depends on the surface, appearance, moisture and use.
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