HIGH-PURITY WHITE DOLOMITE
Mineral Overview, Grades, and Industrial Applications
A VERSATILE WHITE MINERAL EXTENDER FOR HIGH-PERFORMANCE INDUSTRIAL APPLICATIONS
Dolomite (CaMg(CO₃)₂) is a naturally occurring double carbonate mineral valued for its whiteness, hardness, and chemical stability. As an extender and functional filler, it is used in paints, coatings, polymers, ceramics, adhesives, construction materials, and more. Unlike pure calcium carbonate, dolomite’s magnesium content enhances mechanical strength, UV and weather resistance, and durability—particularly for exterior and industrial applications.
OUR DOLOMITE GRADES
We offer several particle size grades tailored to different end-use applications.
Use the guide below to find the right grade for your application.
INDUSTRIAL APPLICATIONS
Dolomite is used in a variety of sectors:
→ Paints & Coatings – Textured finishes, anti-corrosion primers, emulsion paints
→ Plastics & Polymers – Mineral filler for strength, UV resistance
→ Ceramics – White ceramics, glaze bases
→ Construction – Adhesives, joint compounds, tile grouts
→ Sealants & Putties – Enhanced body and flow control
WHY CHOOSE DOLOMITE OVER CALCIUM CARBONATE
PROPERTY
Chemical Composition
Whiteness (Reflectance)
Specific Gravity
Mohs Hardness
pH in Aqueous Solution
Oil Absorption
Particle Size Options
TYPICAL VALUE
CaMg(CO₃)₂
95%
2.8–2.9
3.5–4.0
8.5–9.5
20–30 g/100g
<45 µm, <20 µm, <5 µm
While calcium carbonate is widely used as a cost-effective extender, dolomite provides distinct advantages in certain formulations:
Higher Hardness → Better Scrub & Abrasion Resistance: Dolomite increases the durability of the paint film, especially in textured and exterior paints, by reinforcing the coating structure.
Superior Weathering Resistance: Ideal for outdoor coatings, dolomite provides better resistance to UV degradation, moisture, and environmental wear than pure calcium carbonate.
Improved Film Strength & Texture Control: In coarse grades (10–45 microns), dolomite improves the texture effect, making it ideal for high-PVC architectural and decorative coatings.
Magnesium-Enhanced Stability: The presence of magnesium enhances chemical stability and resistance to acidic conditions—especially important in polluted or coastal environments.
Low Oil Absorption: Like calcium carbonate, dolomite requires less binder, helping optimize rheology while maintaining good binding strength to substrates.
SUMMARY: DOLOMITE AT A GLANCE
HIGH BRIGHTNESS
Visually clean, color-neutral filler
EXCELLENT UV RESISTANCE
Suitable for demanding outdoor uses
MAGNESIUM CONTENT
Improved hardness & chemical resistance
COST-EFFECTIVE PERFORMANCE
Lower TiO₂ usage, high durability
LOW OIL ABSORPTION
Efficient binder use
SAFER THAN TALC
Non-carcinogenic, EU-compliant
TECHNICAL SUPPORT & LOGISTICS
InduMinerals works closely with certified producers to ensure:
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Consistent grade quality and particle control
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Supply of bulk or bagged material globally
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Technical documentation, SDS, and application insights
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Support in ceramic formulation, compound design, or paint systems
YOUR INDUSTRIAL MINERAL PARTNER
InduMinerals OÜ supplies high-purity wollastonite and dolomite for ceramics, coatings, plastics, metallurgy and construction. We offer reliable CIF and FOB delivery with full technical support. A partner of the European Raw Materials Alliance (ERMA), promoting secure mineral supply in Europe.