What Gebr. Dorfner Gmbh & Co. KG does

Gebr. Dorfner GmbH & Co. KG is a 130-year-old, family-controlled German specialty minerals group that extracts, refines, and sells functional fillers and industrial minerals to manufacturers of paints and coatings, quartz composites, construction chemicals and building materials, ceramics, glass, and paper. The company's proprietary particle technology and high-tech modification processes transform high-quality raw materials — sourced from exclusive access to one of Germany's most important kaolin and quartz deposits — into engineered products marketed under brands such as REFINERALS® and GRANUCOL®.

Core offerings span calcined kaolins for dispersion paints and lacquers, GRANUCOL® filler systems for quartz composite sinks and surfaces, construction-grade filler systems for flooring, concrete, and mortar, silicatic raw materials for paper and glass production, and metakaolin solutions for CO2-reduced concrete. Dorfner applies artificial intelligence to translate more than a century of accumulated product and process knowledge into optimized customer formulations, an approach that won the 2025 Best of AI Award. The business serves enterprise and mid-market manufacturers across four primary verticals: paints and coatings, quartz composites, construction and building materials, and classical industrial sectors (paper, glass, ceramics).

Commercially, Dorfner operates a direct enterprise sales model with application-engineering support, quoting custom specifications per customer. Distribution is anchored by wholly owned subsidiaries in Germany (Hirschau headquarters, Munich), the United States (Tucson-based ACS International Products, LP), and Poland (Dorfner Minerals Polska), complemented by a 2021 joint venture with India's 20 Microns covering Asian and African markets. A June 2025 acquisition of strategic business divisions of the U.S. R.J. Marshall Company materially extends North American reach, and the group's EcoVadis Silver Medal (2026) underwrites ESG-qualified enterprise procurement access.

Name

Gebr. Dorfner Gmbh & Co. KG

Legal name

Gebrüder Dorfner GmbH & Co. KG

Website

https://dorfner.de

Company type

Private

Founded year

1895

Operating status

Operating

Headcount range

1–10 employees

Short description

Founded in 1895 in Hirschau, Germany, Gebr. Dorfner GmbH & Co. KG is a family-owned specialty minerals group that refines and sells functional fillers — including calcined kaolins, GRANUCOL® composites, and metakaolin — to manufacturers of paints, quartz composites, construction materials, ceramics, glass, and paper across Europe, North America, and Asia.

Ownership category

akta.pro rank

Headquarters

HQ city

Hirschau

HQ country

Germany

HQ region

Europe

Offices4 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Operations, Supply Chain, Personnel, Technology or R&D, Infrastructure, Marketing or Sales

Revenue model

1. Functional Fillers and Industrial Minerals Sales: Primary revenue from manufacturing and selling refined industrial minerals and functional filler systems including calcined kaolins, coated quartz products, and specialty mineral compounds to manufacturers across coatings, construction, composites, and industrial sectors.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels4 records

Core offering

Gebr. Dorfner extracts, refines, and sells industrial minerals and functional filler systems—including calcined kaolins, GRANUCOL composite fillers, REFINERALS, silicatic raw materials, and metakaolin—to manufacturers of paints, coatings, quartz composites, construction materials, ceramics, glass, and paper. Products are customized through application engineering and AI-optimized recipe development to improve customer product performance, durability, and cost efficiency.

Product overview

Dorfner is a leading expert in the extraction, refinement, and application of industrial minerals and functional filler systems. The company operates as a single unified product portfolio focused on specialized mineral solutions. The core offerings include GRANUCOL® fillers for composites, calcined kaolins for coatings, filler systems for construction applications, silicatic raw materials, REFINERALS® brand of highly refined industrial minerals, and metakaolin for sustainable construction. These products serve manufacturers of paints, lacquers, quartz composite objects, flooring systems, ceramics, glass, paper, and construction materials, enabling customers to make their products more performant, durable, or economical.

Differentiator

Problem solved

Functional benefit

Brands

• GRANUCOL®: Functional fillers for quartz composite sinks and composite materials, providing durable and resistant surfaces.
• REFINERALS®

Products and services

• Coatings (Calcined Kaolins) Calcined kaolin products that improve dispersion paints, lacquers, and coatings for DIY and professional applications, with AI-driven recipe optimization.
• GRANUCOL Filler Systems Functional fillers for quartz sinks and composite materials, providing long-lasting, resistant, and aesthetically flexible surfaces for kitchen, sanitary, and other composite applications.
• Constructions (Filler Systems) High-quality filler systems and minerals for flooring systems, concrete, mortar, and other construction and building chemistry applications.
• Silicatic Raw Materials Silicatic raw materials supplied for paper, glass, ceramics, building materials, and construction chemistry applications.
• REFINERALS Highly refined industrial minerals produced through proprietary processing of high-quality raw materials from Dorfner's exclusive German kaolin and quartz deposits.
• Metakaolin Metakaolin product used in concrete and other construction applications to reduce CO2 emissions and improve sustainability of construction materials.

Quantifiable outcome

• EcoVadis Silver certification for environmental and labor practices
• +1 more outcomes

Named customers6 records

Segments4 records

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Three partnerships are on record, tiered core and minor.

• 20 MicronscoreStrategic or Co-development Partner · 1 January 2021In 2021, Dorfner and 20 Microns established a joint venture in India for the development, marketing, and distribution of color sand products in India as well as further Asian and African markets. The JV focuses on Indian color sand business for industrial applications, importing products from Hirschau and sourcing local products from 20 Microns.
• ANZAPLAN GmbHcoreOthersANZAPLAN is a leading consulting and engineering firm for industrial, specialty mineral, and metal projects. They offer process design, market and application consulting, and high-precision analyses along the entire project value chain. Positioned as an ideal addition to the Dorfner Group.
• SiO2 Ventures GmbHminorOthersSiO2 Ventures operates alongside the development of their own projects and ideas, supporting small and medium-sized companies in forward-looking digitalization topics. Part of the Dorfner Group that enables new ways to shape the future.

Scale indicators3 records

Recent moves7 records

Expansion highlights6 records

Direct peers

• Thiele Kaolin Company: US kaolin producer supplying coatings, adhesives, plastics, and rubber. Comparable mineral filler product portfolio and customer industries.
• KaMin LLC: US-based kaolin miner and processor serving paper, paint, coatings, and adhesives markets. Direct overlap on calcined kaolins and functional fillers for coatings.
• Quarzwerke GmbH: German family-owned mineral processor producing silica, feldspars, and functional fillers for industrial applications. Closest geographic and product-line competitor with similar Mittelstand positioning.
• SCR-Sibelco: Global silica, nepheline, and feldspar producer serving glass, ceramics, construction, and industrial markets. Overlapping product lines (siliceous raw materials, fillers) and similar customer industries.
• Active Minerals International: Producer of functional mineral additives including kaolin and attapulgite for paint, coatings, construction, and industrial applications. Direct competitor in specialty fillers.
• Imerys: Global leader in specialty minerals including kaolin, quartz, and functional fillers serving paper, coatings, plastics, and construction. Directly comparable product portfolio, end-market mix, and global distribution model.
• Minerals Technologies Inc. US-listed specialty minerals company producing fillers, pigments, and additives for paper, construction, and consumer products. Directly comparable in fillers, coating additives, and construction chemistry exposure.
• Elementis plc: UK-listed specialty chemicals company producing performance additives and functional minerals for coatings, construction, and personal care. Overlapping filler and additive product lines.

Broad incumbents

• Evonik Industries: German specialty chemicals major with silica, additives, and coating solutions divisions. Larger, more diversified competitor with partial overlap on functional fillers and construction chemistry.

Emerging players

• 20 Microns: Indian specialty minerals producer that is Dorfner's joint venture partner for India and emerging Asian/African markets. Comparable industrial mineral and filler products in a different geographic footprint.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/gebr-dorfner-gmbh-&-co-kg

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries6 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Gebr. Dorfner Gmbh & Co. KG