Two Censil grades map to ED 30, depending on the finish you're after. Both are wax-modified precipitated silicas for waterborne wood and plastic coatings, at 20–30% lower cost.
Quick answer
Censil660 (d50 5.0 – 5.3 μm) is the closest particle-size match to ED 30 and the one to start with for water-white clear topcoats. Censil1650A (d50 6.2 – 6.5 μm) runs coarser and is the choice when you want a lower-gloss, deep-matte surface. The ED supplier publishes ED 30 at 5.5 μm with organic surface treatment; we publish pore volume and surface area, which the ED supplier does not.
Each column reproduces figures from the publishing manufacturer’s own documentation, cited below the table.
| Parameter | ED 30by the ED supplier | Censil660Lead — high-clarity water-white | Censil1650ALead — low-gloss deep-matte |
|---|---|---|---|
| Median particle size, d50 | 5.5 μm (average, light scattering) | 5.0 – 5.3 μm | 6.2 – 6.5 μm |
| Pore volume | Not stated in cited source | 1.6 – 1.8 mL/g | 1.6 – 1.8 mL/g |
| Specific surface area | Not stated in cited source | 250 – 280 m²/g | 250 – 280 m²/g |
| Surface treatment | Organic | Wax-modified (organic / PE-wax; grade-dependent) | Wax-modified (organic / PE-wax; grade-dependent) |
| pH | 7.0 | 6.0 – 8.0 (5% susp.) | 6.0 – 8.0 (5% susp.) |
| Oil absorption | 300 g/100g | Not stated in cited source | Not stated in cited source |
| SiO2 content, dry | Not stated in cited source | ≥ 99% | ≥ 99% |
| Recommended dosage | Not stated in cited source | 1 – 4% | 1 – 4% |
| Packaging | 15 kg bag | 20 kg multi-wall bag, palletized | 20 kg multi-wall bag, palletized |
ED 30 column — ED supplier — Technical Information, Product Properties EMEA Region, DOC062 (© 2021). Positioning note — ED supplier website — product line page (accessed 16 Jul 2026). Censil columns — Censilcoat published grade specification, products page. “Not stated in cited source” means the value does not appear in the document cited; no figure has been estimated, inferred, or transferred between columns.
Separate from the datasheet comparison above: our laboratory in Fujian ran a commercially purchased sample of ED 30 and Censil660 and Censil1650A side by side in the same waterborne acrylic clear topcoat over 2025 Q4 – 2026 Q1. Every figure below is our own parallel measurement — not a manufacturer specification. Star ratings are relative in-house assessments on identical panels.
| Parameter | ED 30lab-measured, purchased sample | Censil660lab-measured | Censil1650Alab-measured |
|---|---|---|---|
| Median particle size d50 (measured) | 5.5 μm | 5.1 μm | 6.3 μm |
| d50 spread, Δd50 | ±0.5 μm | ±0.3 μm | ±0.3 μm |
| Pore volume | 1.8 mL/g | 1.8 mL/g | 1.8 mL/g |
| Specific surface area, N₂ | 300 m²/g | 265 m²/g | 260 m²/g |
| Oil absorption | 300 g/100 g (DBP) | 270 g/100 g (DBP) | 275 g/100 g (DBP) |
| pH (5% suspension) | 7.2 | 6.5 | 6.5 |
| SiO₂ content, dry basis | 99.0% | 99.2% | 99.1% |
| Loss on drying, 105 °C | 3.5% | 4.5% | 4.8% |
| Surface treatment | Wax-treated (organic) | High-melting PE wax | High-melting PE wax |
| Blushing after cure, 85% RH | Slight blushing ★★★☆☆ | No blushing ★★★★★ | No blushing ★★★★★ |
| Suspension in waterborne system, 7 days | Slight soft sediment | No hard sediment | No hard sediment |
| Clarity on dark panel | High clarity ★★★★★ | Water-white ★★★★★ | High clarity ★★★★★ |
| Surface smoothness (touch) | ★★★★★ | ★★★★★ | ★★★★★ |
| Matting efficiency at equal loading | ★★★★★ | ★★★★★ | ★★★★★ |
Method notes: d50 by laser diffraction (Malvern); blushing rated after cure and conditioning at 85% relative humidity; suspension observed over 7 days in the waterborne system; matting efficiency compared at equal loading. Lab-measured values for the reference grade may differ from the manufacturer’s published specification.
Censil660 (d50 5.0 – 5.3 μm) is the closest particle-size match to ED 30 and the one to start with for water-white clear topcoats. Censil1650A (d50 6.2 – 6.5 μm) runs coarser and is the choice when you want a lower-gloss, deep-matte surface. The ED supplier publishes ED 30 at 5.5 μm with organic surface treatment; we publish pore volume and surface area, which the ED supplier does not.
Datasheet parity is the starting point, not the proof. A 1:1 replacement is confirmed on your own line: run the Censil grade at the same dosage as your current import, compare gloss at 60° and 85°, clarity on a dark panel, touch and can stability — then fine-tune dosage within ±0.3%. Typical evaluation cycle is 1–2 weeks, and we ship a free 2 kg sample with a 1:1 benchmark sheet for exactly this.
It is built as one: start at the same dosage you run today, then fine-tune within ±0.3% to land your target gloss. Datasheet parity is the starting point — the replacement is confirmed on your own line. We ship a free 2 kg sample with a 1:1 benchmark sheet for exactly this.
Censil660 (d50 5.0 – 5.3 μm) for water-white clear topcoats where transparency and wood-grain depth matter. Censil1650A (d50 6.2 – 6.5 μm) for low-gloss deep-matte surfaces. If you're replacing ED 30 in a clear topcoat, start with Censil660.
The ED supplier positions the ED series for solvent-based wood coatings and recommends its AQ, W and 7000 series for waterborne. Many Southeast Asian formulators nevertheless run ED 30 in waterborne systems. Censil grades are engineered for waterborne from the start — that is the point of the range.
The ED supplier does not publish numerical pore volume or BET surface area for ED 30 in its EMEA product properties table — only a graphical matting-efficiency chart. Censil660 and Censil1650A are published at 1.6 – 1.8 mL/g pore volume and 250 – 280 m²/g surface area.
20–30% below imported ED 30 pricing, factory-direct with no distributor margin. First orders are flexible at 500 kg to 1 ton — not the 5–10 tons or full container multinational suppliers typically require.
A 1:1 physicochemical benchmark sheet against ED 30, the relevant TDS, SDS, COA per batch.
Send your resin system, target gloss and the grade you use today. We’ll ship a free 2 kg sample with a 1:1 benchmark sheet against ED 30, the relevant TDS. We reply within 24 hours.
Request a Free 2 kg SampleCensilcoat is not affiliated with, endorsed by or sponsored by the manufacturers of the reference grades. Trademarks are used solely to identify the reference products a customer may currently use, for comparison purposes. Reference-grade figures are reproduced from the manufacturers’ published documentation as cited and were current on the page date; manufacturers may revise specifications without notice. Censil figures are typical guidance values — the controlled specification per grade is stated in the grade TDS. Performance must be verified by the customer under their own conditions.