SCHAEFER KALK GmbH & Co. KG
About
SCHAEFER KALK GmbH & Co. KG is a fifth-generation family-owned lime manufacturer headquartered in Diez, Germany, with approximately 700 employees worldwide and over 160 years of continuous operation. The company produces a comprehensive portfolio of high-purity lime and limestone products, ranging from raw limestone and crushed lime through burned lime (calcium oxide) to hydrated lime, lime milk suspensions, and precipitated calcium carbonates. For the water and wastewater sector, SCHAEFER KALK offers several specialized brands: SCHAEFER KLAROLIT optimises biological treatment processes and increases acid capacity in wastewater plants; SCHAEFER PRECAphos provides combined phosphate precipitation and biological treatment enhancement, with an aktiv variant for higher-performance phosphorus removal; SCHAEFER PRECAsorb blends fine white lime with sorbent additives such as lignite coke and activated carbon for contaminant adsorption in environmental and flue gas applications; and PRECAL Milk of Lime is available in concentrated (PRECAL 75) and standard (PRECAL 71/72) formulations for precise dosing in water treatment. The company also manufactures PRECARB precipitated calcium carbonates under several sub-brands — PRECAseal and PRECAflow for sealants and adhesives, PRECAfood for food and pharmaceutical grades, and PRECAfeed for animal feed — along with PRECAL lump, crushed, and hydrated lime products meeting EN 459 and EN 12518 standards. SCHAEFER KALK operates production facilities across Germany, Europe, and Asia, and was recognised with a European Sustainability Award from AggregatesEurope in 2026.
Key Products
Lime-based product for wastewater treatment that optimizes biological wastewater treatment processes and increases acid capacity in treatment plants.
Innovative phosphate precipitation product that combines phosphorus removal with optimization of biological wastewater treatment in a single application.
Activated phosphorus product variant providing enhanced phosphate precipitation performance in wastewater treatment applications.
Fine white lime or limestone powder blended with additives such as lignite coke or activated carbon for sorption applications in environmental and flue gas treatment.
Chemically pure lump and crushed calcium oxide products in defined grain sizes for industrial, water treatment, and construction applications.
High-purity, high-reactivity calcium oxide meeting EN 459/EN 12518 standards, available in Type N and Type S variants for water treatment and construction.
Very high chemical purity calcium hydroxide available in multiple grades (PRECAL 50 S/N, 54, 56, 660) for water treatment, flue gas desulphurization, and industrial processes.
Calcium hydroxide product specifically formulated for asphalt production applications.
Highly reactive lime slurry available in concentrated (PRECAL 75) and standard (PRECAL 71/72) formulations for technical dosing applications in water and wastewater treatment.
Limestone granules, sands, and powder in defined grain sizes (90 µm and coarser) for filtration, neutralization, and construction applications.
Precipitated calcium carbonate with controlled particle morphology and defined grain structure for paper, paint, plastics, sealants, and adhesive applications.
Surface-treated precipitated calcium carbonate (cPCC) providing enhanced performance in sealant and adhesive formulations with improved dispersion and rheology.
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