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90Mesh
CENOLITE
2621900090
Cenospheres for Fillers & Coatings are lightweight hollow aluminosilicate microspheres with 90 Mesh Through particle size and true density around 0.90-0.95 g/cm³. This grade is designed for lightweight fillers, coatings, putties, and general direct sales applications where stable mineral filling and weight reduction are required.
▸ This grade is selected for customers who need a practical lightweight mineral filler for coatings, putties, fillers, and general industrial formulations.
▸ 90 Mesh Through particle size provides a balanced distribution for easy blending, volume filling, and surface material applications.
▸ The relatively higher true density range of approx. 0.90-0.95 g/cm³ provides stable filling performance while still reducing weight compared with dense mineral fillers.
▸ Balanced Filler Grade: Suitable for general filler use where cost, density, and processing stability must be balanced.
▸ 90 Mesh Through Particle Size: Practical for coatings, putties, fillers, and direct sales applications requiring stable handling.
▸ Lightweight Volume Filling: Hollow spherical structure helps reduce formula weight and improve volume efficiency.
▸ Good Blending Behavior: Spherical particles support dispersion and mixing in dry and wet systems.
▸ Multi-Use Application: Suitable for coating fillers, putty systems, lightweight compounds, and general mineral filler markets.

▸ Lightweight fillers for coatings and putties
▸ Wall putty, repair compounds, and surface finishing materials
▸ General industrial filler and volume extender applications
▸ Lightweight coating and texture systems
▸ Direct sales grade for distributors and formulation trials

| Chemical Analysis (Typical) | |
| SiO₂ | 50-60% |
| Al₂O₃ | 25-40% |
| Fe₂O₃ | 1-6% / low iron grade available |
| CaO | 1-1.5% |
| Physical Properties | |
| Shape | Hollow spherical powder |
| Color | Light grey to white |
| Particle Size | 90 Mesh Through |
| True Density | Approx. 0.90-0.95 g/cm³ |
| Recommended Use | Lightweight fillers, coatings, putties, and general applications |
| Bulk Density | Grade dependent |
| Customization | Particle size and density available on request |
▸ CENOSPHERE TDS — general technical data for product introduction, customs declaration, and customer evaluation.
▸ Coating Grade Specification Sheet — detailed particle size distribution, pH, and iron content for coating formulations.
▸ 600 kg jumbo bags — approximately 40 bags per 40' High Cube FCL, depending on grade and loading plan.
▸ Custom packaging, palletizing, and private labeling are available upon request.
▸ Store sealed in dry conditions. Reliable container shipment is available to major ports worldwide.
▸ It means the product is screened to pass 90 mesh, making it suitable for general filler, coating, and putty applications.
▸ It can be used in many coating and surface systems, but very smooth thin-film coatings may require a finer coating-grade selection.
▸ This density range offers stable filling and handling while still providing weight reduction compared with dense mineral powders.
▸ Yes. It is suitable for general direct sales, distributors, and customers evaluating cenosphere filler applications.
▸ Yes. Samples, TDS, and batch COA can be provided for testing.
Contact SEPPE for product specifications, samples, formulation trials, OEM packaging, and bulk pricing.
Request a QuoteSEPPE operates a fully integrated ISO 9001:2015 certified quality management system for coating grade cenospheres. Quality control focuses on particle size consistency, low iron content, particle density, moisture, chemical composition, and dispersion performance for coating applications.
▸Our quality control process covers the key stages from raw material verification to final shipment, with acceptance criteria confirmed by the applicable TDS, COA, purchase specification, or agreed test plan.
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| Test Parameter | Test Method | Specification |
|---|---|---|
| Particle Size Distribution | ISO 13320:2020 Laser Diffraction | D50: 45–60 μm D98: 105–140 μm |
| pH Value | ISO 787-9:2019 10% Aqueous Suspension | 7.0 ± 1.0 |
| Iron Content (reported as Fe₂O₃) | X-Ray Fluorescence (XRF) | < 6% |
| True Density (Particle Density) | ISO 12154:2014 Gas Displacement Pycnometry | 0.70–0.90 g/cm³ |
| Moisture Content (Matter Volatile at 105°C) | ISO 787-2:2021 105°C, 2 h | ≤ 0.3% |
| Chemical Composition | X-Ray Fluorescence (XRF) | SiO₂: 55–65% Al₂O₃: 27–33% |
| Dispersion Test | High-Speed Mixing + Hegman Gauge Agreed Coating System | According to the selected coating system and customer-approved test plan |
Testing note: Final specifications, test methods, acceptance limits, and testing frequency shall be confirmed in the applicable TDS, batch COA, purchase specification, or customer-approved test plan.
▸ Our laboratory equipment supports the coating-grade control parameters listed above:
• Laser Particle Size Analyzer – particle-size distribution by ISO 13320:2020.
• pH Meter – pH of a 10% aqueous suspension by ISO 787-9:2019.
• XRF Spectrometer – iron content and major oxide composition.
• Gas Pycnometer – particle density by gas displacement pycnometry in accordance with ISO 12154:2014.
• Drying Oven and Analytical Balance – matter volatile at 105°C by ISO 787-2:2021.
• High-Speed Disperser and Hegman Gauge – dispersion assessment under customer-agreed coating-system conditions.



▸ CENOLITE 910 quality control covers the following critical parameters:
• Particle size distribution – laser diffraction by ISO 13320:2020; D50: 45–60 μm and D98: 105–140 μm.
• Iron content (reported as Fe₂O₃) – controlled below 6% by XRF.
• pH value – 10% aqueous suspension by ISO 787-9:2019; 7.0 ± 1.0.
• True density (particle density) – gas displacement pycnometry by ISO 12154:2014; 0.70–0.90 g/cm³.
• Moisture content – matter volatile at 105°C by ISO 787-2:2021; ≤ 0.3%.
• Dispersion performance – evaluated with high-speed mixing and a Hegman gauge under the selected coating system and agreed test conditions.
▸ D50 = 45-60 μm, D98 = 105-140 μm, optimized for thin-film and industrial coatings.
▸ Low iron (≤6%) ensures lighter color and better opacity, especially for white or light-colored paints and primers.
▸ Dispersion can be evaluated using high-speed mixing and a Hegman gauge under a customer-agreed coating system, addition level, mixing speed, test duration, and acceptance criterion.
▸ Yes, each shipment includes a digital Certificate of Analysis with batch-specific test results.
▸ Yes, we offer custom cuts (e.g., D50=30-40μm for high-gloss finishes) upon request.
Contact our coating specialists to discuss custom PSD, iron content targets, or to request batch samples for your formulation.
Contact Coating Team