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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint744,769 companies indexed · Last updated: today
DirectoryBusiness & Technical ServicesResearch & DevelopmentLandquartKLARK AG
KLARK AG Logo
Verified· 4 sourcesOwner confirmed
Last updatedAugust 20, 2026
Summary

About the company

Die Gesellschaft bezweckt die Herstellung, den Handel, Dienstleistungen und die Logistik von Baustoffen jeder Art, insbesondere von ökologischen Baustoffen und CO2-Senkeleistungen in der Schweiz oder im Ausland. Sie kann ferner ein Lizenzsystem aufbauen, entwickeln und führen und alle damit verbundenen Tätigkeiten wahrnehmen. Sie kann Niederlassungen und Tochtergesellschaften errichten, sich an anderen Gesellschaften beteiligen und für die Tätigkeiten notwendige Vermögenswerte besitzen. Die Gesellschaft kann alle weiteren Geschäfte tätigen und Massnahmen ergreifen, die den Zweck der Gesellschaft fördern oder mit diesem direkt oder indirekt zusammenhängen.

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KLARK AG

Offering

Products & services

Industry:Research & DevelopmentSpecialized Construction ActivitiesSustainability SectorGlass, Ceramics, Stone & Construction Materials IndustryRetail - Construction & Raw MaterialsWholesale - Construction & Raw Materials
✓ Offered1
KLARK
KLARK is a CO₂-storing concrete. CO₂ is permanently bound in the building material via certified biochar (biogenic carbon). Thus buildings and components become CO₂ sinks. The storage performance is effective immediately and externally verified. KLARK is the only building material with a net-zero balance that also separately shows the CO₂ storage performance. The CO₂ emissions generated during production are offset, and the permanently stored biogenic carbon is also transparently and measurably disclosed. Variants (offsetting the production-related CO₂ emissions, A1-A3): KLARK 100%: full offset, net-zero balance KLARK 75%: offset of 75% KLARK 50%: offset of 50% Technology: comparable properties to conventional concrete (base C30/37), also usable as a partial application (e.g., base slab, stairwell). Model: distribution via a licensing system, licensees (concrete manufacturers) produce and deliver KLARK.
auf Anfrage
Expertise

Expert

AS
Andreas Schefer
Managing Director

Andreas Schefer is the managing director of KLARK AG, the Swiss company for CO₂-storing concrete. He has accompanied KLARK since its beginnings and drives the nationwide establishment of this Graubünden climate innovation.

Common questions

Answers

What is KLARK?
KLARK is a CO₂-storing concrete from Switzerland that permanently binds CO₂ in the building material with the help of certified biochar, turning buildings into long-term CO₂ sinks.
How does KLARK's CO₂-neutral concrete work?
KLARK mixes biogenic carbon from biochar into the concrete. This remains permanently bound even after multiple recycling cycles and offsets the production-related CO₂ emissions, up to a net-zero balance.
Is KLARK's CO2 impact proven?
Yes. KLARK's environmental balance sheet is prepared according to KBOB rules, externally verified, and listed in the official KBOB register. The sink performance is measurable and certified. The CO2 storage capacity is shown with a CO2 certificate.
How much CO₂ does KLARK concrete store?
KLARK stores up to around 250 kg CO₂ per cubic meter of concrete, depending on the variety, permanently bound in the structure, with technically equivalent properties to conventional concrete.
Where can I buy KLARK concrete?
KLARK is distributed through a Swiss licensed network. Regional concrete manufacturers produce with regional resources and deliver KLARK directly to the construction site, also for partial applications.
Press

Media

July 24, 2026Media
Eines der grössten Referenzobjekte für CO2 -speichernden Beton
schweizer-bauwirtschaft.ch
May 22, 2026Media
Klimastiftung Schweiz fördert neu acht KMU
punkt4.info
January 1, 2026Media
KLARK AG Nomination ZKB Pionierpreis Technopark 2026
zindel-united.swiss
January 1, 2026Media
Die KLARK AG erweitert laufend die Verfügbarkeit durch zusätzliche Lizenznehmer
klark.swiss
January 1, 2026Media
Ersatzneubau in Zürich mit KLARK.
betonsuisse.ch
Credentials

Certifications & memberships

KBOB/ecobau Ökobilanz
KLARKs Netto-Null-Bilanz ist über die KBOB-Liste, den Schweizer Ökobilanz-Standard im Bau, anerkannt
January 1, 2024
Knowledge

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Contact

Location

Sägenstrasse 8
7302 Landquart
Opening hours
Mon
07:30 - 17:00
Tue
07:30 - 17:00
Wed
07:30 - 17:00
Thu
07:30 - 17:00
Fri
07:30 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-314.037.382
Founded
2025 · 1 year
Last commercial register change
September 10, 2026
Employees
1 to 10

Active throughout Switzerland