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100 Mesh
CENOLITE
2621900090
SEPPE cenospheres for FRP composites are lightweight hollow aluminosilicate microspheres with 100 Mesh Through particle size and approx. 0.80-0.85 g/cm³ true density. This grade is designed for fiberglass composites, FRP panels, molded composite parts, and weight-reduction applications requiring stable lightweight mineral fillers.
▸ Cenospheres for FRP composites are hollow ceramic microspheres used as lightweight composite fillers in fiberglass-reinforced plastic systems.
▸ The 100 Mesh Through grade supports dispersion in resin-fiberglass systems and helps reduce finished part weight in FRP panels and molded components.
▸ The approx. 0.80-0.85 g/cm³ true density range provides effective weight reduction while maintaining inorganic stability in composite formulations.
▸ FRP Composite Filler: Suitable for fiberglass composite filler applications, FRP panels, molded parts, and lightweight structures.
▸ Composite Weight Reduction: Hollow microspheres lower density in composite materials while maintaining filled volume.
▸ 100 Mesh Through: Fine screened particle size supports more uniform distribution in resin and fiberglass systems.
▸ Dimensional Stability Support: Inorganic aluminosilicate particles can help improve dimensional consistency in suitable composite formulas.
▸ Low Density Composite Filler: Approx. 0.80-0.85 g/cm³ true density is suitable for composite weight-saving projects.

▸ FRP composite panels and molded components
▸ Fiberglass-reinforced plastic parts
▸ Lightweight composite filler systems
▸ Marine, transportation, and construction composite materials
▸ Weight reduction filler for composite formulations
| 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 | 100 Mesh Through |
| True Density | Approx. 0.80-0.85 g/cm³ |
| Recommended Use | FRP composites, fiberglass composite filler, panels, molded parts, and weight reduction |
| Bulk Density | Grade dependent |
| Customization | Surface treatment and particle size selection available on request |
▸ CENOSPHERE TDS — general technical data for FRP composite filler evaluation and customer documentation.
▸ Coating Grade Specification Sheet — particle size distribution, pH, iron content, and coating-grade controls.
▸ 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.
▸ Cenospheres reduce composite weight while adding stable hollow mineral filling to resin-fiberglass systems.
▸ Yes. The fine screened grade supports distribution in resin and helps reduce coarse particle defects in composite parts.
▸ It can support dimensional consistency in suitable formulations, but final performance should be confirmed by composite testing.
▸ Yes. It can be evaluated in FRP panels, molded products, lightweight structures, and fiberglass composite materials.
▸ SEPPE can provide samples and basic grade selection guidance, while final loading should be confirmed by your resin and composite process tests.
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