Name: Darson Kaolin for Construction Products
Brand: Darson

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Kaolin for Construction

Kaolin (also called China clay)

Construction products such as tile adhesive powders, wall putty, skim coat, joint compounds, and polymer-modified renders all require inert mineral fillers that add body, control workability, and reduce shrinkage without reacting with binders.

UT-WHITE hydrous kaolin at D50 4.571 µm works as a functional mineral filler in dry-mix construction products. Its fine particle size improves dispersion and flow in powder formulations, while chemical inertness ensures compatibility with cement, gypsum, and polymer binders. Low oil absorption (46.8 g/100g) allows high filler loading without compromising spreadability.

Functional filler in tile adhesive powder and dry-mix mortars
Extender in wall putty, skim coat, and exterior render
Improves workability and reduces cracking in polymer-modified compounds

Turning Weakness into Strength

Chemical reaction converting lime into structural strength

Performance Characteristics

Inert Mineral Filler

Chemically inert at ambient temperature; compatible with cement, gypsum, and polymer binders in dry-mix mortars, putty, and renders without unwanted side reactions.

Workability Aid

Fine D50 4.5 µm particle size improves powder flow and application consistency in tile adhesive powders, skim coat, and dry-mix mortar formulations.

Cost Extender

Extends more expensive mineral components at high loading with low oil absorption (46.8 g/100g), reducing formulation cost while maintaining spreadability and bond strength.

Recommended Grades

Grades for construction materials, improving workability, whiteness, and durability in cement, dry-mix mortars, and cementitious coatings.

UT-LUMP

Entry-level hydrous kaolin, rotary-screened and sun-dried, as fine powder with small lumps. At 74.3% ISO brightness, a cost-effective choice for ceramic bodies, construction, and agricultural use.

Brightness (ISO)74.3%

Moisture0.51%

Mean Particle Size7.742 µm

D₅₀5.047 µm

Oil Absorption48.0 g/100g

pH7.02

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UT-WHITE

Finely ground hydrous kaolin with 80.3% ISO brightness and a consistent 400-1200 mesh particle size, for smoother, more uniform mixing. A bright, reliable filler for rubber compounds, plastics, paper, and adhesives.

Brightness (ISO)80.3%

Moisture0.33%

Mean Particle Size6.115 µm

D₅₀4.571 µm

Oil Absorption46.8 g/100g

pH8.0

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Coming Soon

UT-WASH

A meticulously refined material developed for technical precision. The specialized washing process eliminates grit to ensure smooth, defect-free production in ceramics where structural integrity is critical.

ProcessPrecision Washing

Target WhitenessHigh (94%+)

Target QualityGrit-Free

Purity LevelReduced Contamination

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Coming Soon

UT-ULTRA

Our upcoming calcined kaolin grade, processed at high temperatures to maximize structural hide and opacity. Designed for specialty industrial applications requiring higher purity and performance.

ProcessFull Calcination

Target WhitenessExtremely High

Target QualityLow-Iron, High-Purity

Purity LevelNear-Zero Impurities

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Start Your Inquiry

Factory direct pricing for local and international orders. Darson exports kaolin FOB Bangkok to buyers across Thailand, Bangladesh, Malaysia, India, and Southeast Asia.

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