Welcome to Cirkel

Innovative building materials and
multifunctional minerals

Building Materials

Construction expertise with
strong brands

Multifunctional Minerals

Calcium Silicate Hydrate Products (CSH)

Sustainability

We're already thinking about tomorrow

Careers

We're expanding our team

Aktuelle Meldungen, News und Fachbeiträge von Cirkel

11 Juni 2026

Optimiert für die Praxis: Die neue PORIT Planstein-Generation 480 mm

Wer im modernen Wohnungsbau erfolgreich sein will, muss zwei Dinge miteinander vereinbaren: höchste Energieeffizienz und maximale Wirtschaftlichkeit. Um Ihnen beides noch einfacher zu machen, haben wir unser Sortiment der PORIT Plansteine für Sie optimiert.
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10 Juni 2026

Neue Lebenszyklusuntersuchung belegt Zertifizierbarkeit und Wirtschaftlichkeit

Nachhaltigkeit im Wohnungsbau braucht belastbare Nachweise!
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09 Juni 2026

Kreislaufwirtschaft Teil 5

Projektmanager David Hardt gibt einen Einblick in den Recyclinganteil des Steins, welcher ca. 25 % beträgt. Das Recyclingmaterial stammt aus derm Rückbau der Universität Dortmund.
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ABOUT CIRKEL

Discover the future of building materials and multifunctional minerals.

At Cirkel, innovation and quality are at the heart of what we do. We specialize in high-quality building materials such as PORIT aerated concrete and CIRCOSICHT® facing bricks, as well as KS-PLUS and KS* sand-lime bricks for the construction market. Our multifunctional minerals CIRCOLIT® and CIRCOSIL®, are used in a variety of industries.

Our products are made from natural raw materials such as pure quartz sand, lime, and water. We guarantee continuous internal and external quality control.
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Unsere Kernbereiche und Unternehmen

Sustainability

We take responsibility – with resource-efficient materials and forward-looking solutions.

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Building Materials

Our mineral building materials combine quality, durability, and sustainability in construction.

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Multifunctional Minerals

Whether for water treatment, fire protection, or environmental technology – our silicates create versatile solutions.

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About Us

Get to know Cirkel: a family-owned company with a blend of tradition and innovation.

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Careers

Cirkel as an
Employer

Founded in 1898 as a family-owned business, we currently employ around 200 people across our 5 locations in Haltern am See, Wickede, Emsdetten, Bad Salzdetfurth, and Neuenkirchen-Vörden. With our business units for building materials and multifunctional minerals, we operate in a dynamic environment characterized by the progressive digitalization of business processes in production and administration. A prime example of this is our plant in Neuenkirchen-Vörden, which commenced production at the end of 2020. Here, we are setting new technological standards in manufacturing (Industry 4.0) and energy efficiency.
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What our people say
Employees

Want to build the future with us?

Discover your future opportunities at Cirkel.
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Unsere Produktbereiche und Baustoffe im Überblick. Multifunktionale Mineralien und Baustoffe.

CIRCOSIL®

Raw material for construction chemical applications

CIRCOlit®

Raw material for paper, paint & varnish applications

CIRCOsicht®

The Calcium Silicate Facing Brick

KS-Original

The Calcium Silicate Brick

KS-plus

The smart modular system

porit autoclaved aerated concrete

Autoclaved Aerated Concrete