Icon Kontakt Email


Icon Telefon

+49 2638 | 9317-0



Concrete Stabilizer ALPHALITH® F2 (ST)

High performance liquid stabilizer for concrete to reduce bleeding and sedimentation.

Stabilizers have a positive effect on the sedimentation behavior of concrete.

Bleeding of concrete is the separation of water from a ready-mixed, poured, compacted concrete.

This phenomenon is caused by separation of the concrete and occurs during and after processing.

Bleeding of the concrete lasts until the setting or hardening process begins. Various factors, such as mixtures with a low cement content, excessive water content or an overdose of superplasticizer can have an effect on bleeding.

The use of mixtures with low fines content is yet another reason for concrete bleeding. In this case, stabilizers have a positive effect on the quality of the concrete and reduce water separation on the surface.

We would be happy to advise you on how you can use a stabilizer and check if it will work for your individual application.

ALPHALITH® F2 (ST) is used in the production of self-compacting concrete (SCC), flow concrete, exposed concrete and pumping concrete.

Your Inquiry

    Bitte beweisen Sie, dass Sie ein Mensch sind und wählen Sie den Schlüssel aus.

    Concrete Stabilizer EN 934-2, T. 4

    Stabilisierer Bluten von Frischbeton auf Baustelle

    Please note that this list is only an informative excerpt from our product range. We will be happy to help you.



    ALPHALITH® F 2 ST is an effective stabilizing admixture for mortar and concrete, especially effective in the production of Self Compacting Concrete (SCC) in conjunction with high-performance superplasticizers, like PCEs e.g.

    The use of ALPHALITH® F 2 ST results in a homogenous concrete mix with minimized segregation and bleeding. With suitable SCC mixes in conjunction with high-end superplasticizer ALPHALITH® Hyperflow type, ALPHALITH® F 2 ST gives a readily-flowing concrete with a good cohesiveness.

    The concrete shows a proper air-detrainment and a uniform surface finish.


    • minimized segregation
    • reduced bleeding
    • improved homogeniety
    • improved cohesion
    • less variation in concrete consistency due to waterbinding capacity
    • improved, more uniform surface finish

    Fields of Application:

    • self-compacting-concrete (SCC)
    • precat elements with improved surface finish
    • pumped concrete
    • anti-washout admix for underwater concrete
    • concrete with lack of fines/powder
    ALPHALITH Viscoton® K

    ALPHALITH® Viscoton® K is a high quality viscosity modifier for cement-based products. ALPHALITH Viscoton® K results in very stable and homogeneous mixtures with high flowability, especially with high-performance concrete such as self-compacting concrete (SVB) in conjunction with high-performance superplasticizers (e.g. alphalith Hyperflow series).


    • bleeding and demixing is effectively prevented
    • improved homogeneity
    • higher sedimentation stability (robustness) of SCC
    • improved fair-faced concrete quality
    • more even grain distribution on shot-blasted

    Fields of Application:

    • concrete that tends to bleed and segregate
    • self-compacting concrete (SCC)
    • exposed concrete
    • blasted special parts

    We are happy to advise you

    We will be happy to help you select a suitable plasticizer for your concrete block products. We analyze your precise requirement profile together with you. Our own quality management system guarantees consistent quality. All products and services of Rhein-Chemotechnik GmbH are measured and evaluated in accordance with the specifications of a DIN EN ISO 9001 certified quality management system.

    We are happy to advice you

    We are happy to advise you

    Your Inquiry

      Bitte beweisen Sie, dass Sie ein Mensch sind und wählen Sie den Schlüssel aus.

      Concrete admixtures for a wide range of applications

      We stock concrete admixtures for the concrete block industry, the precast concrete industry, as well as for ready-mixed and construction site concrete.
      Please contact us. We will be happy to advise you.

      Surface Protection Products
      Impregnation | Sealing| Coating

      Surface protection products protect the stone, increase the colour brilliance and extend its product life. Surface protection products from Rhein-Chemotechnik GmbH are tested according to strict quality specifications in our own laboratory and by independent, external institutes.

      Release Agents

      Our release agents from the tectol series enable you to create attractive and smooth concrete surfaces. tectol includes release agents for various formwork materials such as wood, plastic or steel. We will be happy to advise you.

      Cleaning and Maintenance Products

      Cleaning and maintenance in concrete and precast plants increase safety, improve working conditions
      and extend the service life of the assets. We will be happy to advise you

      Admixture Dispensers

      You can improve the properties of your fresh or hardened concrete with optimally dosed concrete admixtures. Our concrete admixture dosing systems help you get the most out of your product. We will be happy to advise you.

      Biodegradable Granulate

      PAVELITH® InterLay - the new and environmentally friendly layer separation for concrete block products. We will be happy to advise you.

      Service | Consulting | Chemistry and Concrete Laboratory

      The quality of our products and services ist of utmost importance. All products and services of Rhein-Chemotechnik GmbH are measured and evaluated in accordance with the specifications of a DIN EN ISO 9001 cerified quality management system.

      Welcome to Rhein-Chemotechnik GmbH

      With our team of 40 employees, we develop and sell high-quality concrete admixtures and surface protection products. With fixed project partners, we accompany you from the first enquiry to the use of our products on your site.


      Rhein-Chemotechnik GmbH
      Gewerbepark Siebenmorgen 8
      53547 Breitscheid

      Phone. +49 (0)2638 | 9317-0

      Business hours
      Mon - Thu 08.00 a.m. - 17.00 p.m
      Fri 08.00 a.m. - 16.00 p.m.