Spec Sheet — SEMISIL H100 vs Grace C812
Both are matting agents based on silica gel (precipitated, organic treated). Specs come from each supplier’s published TDS — use them as a starting point and confirm against the COA for your specific lot.
| Property | SEMISIL H100 | Grace SYLOID® C812 |
|---|---|---|
| Chemistry | Treated fumed silica | Silica gel (precipitated, organic treated) |
| BET surface area | 230 – 270 m²/g | ~310 m²/g |
| Particle size (d₅₀) | 8.0 – 11.0 µm | ~8 µm |
| Oil absorption | 300 – 380 g/100 g | ~260 g/100 g |
| SiO₂ content | ≥ 99.0 Wt% | ≥ 99 % |
| pH (5% aqueous) | 6.0 – 9.0 | — |
| LoD (105 °C) | ≤ 5.0 Wt% (2 h @ 105 °C) | typically ≤ 5% |
Wax-treated silica gel matting agent for solventborne wood and metal coatings. Higher BET, lower oil absorption.
Why Formulators Cross-Trial SEMISIL H100
- Higher BET (230 – 270 m²/g) than Grace SYLOID® C812 (~310 m²/g) — typically permits a 10 – 20% lower treat rate for the same gloss target.
- Higher oil absorption (300 – 380 g/100 g) — better matting efficiency per gram in solventborne and PU systems.
- Same particle range (8 – 11 µm d₅₀) — no rework of viscosity build, no settling-rate change.
- Untreated high-purity base (SiO₂ ≥ 99%) — clean dispersion in waterborne without conductivity spikes.
- 5-day sample turnaround from MINMETALS EAST China — vs typical 3 – 4 week sample lead-time from EU stock.
Where Grace SYLOID® C812 Still Wins
- Established regulatory dossiers — Grace has 30+ years of global cosmetic, pharma, and food-contact dossier coverage; H100 covers REACH + standard FDA but specialty approvals on request.
- Brand-trust in OEM specifications — major automotive OEMs name Grace grades by part number. H100 is a generic-spec qualified alternative for these.
- Larger global distributor network — Grace ships ex-Europe with 24 – 48h availability across distributors. H100 is direct-from-China.
Frequently Asked Questions
+Is SEMISIL H100 a drop-in replacement for Grace SYLOID® C812?
In most coating formulations: yes. Particle size and BET overlap meaningfully, and chemistry class is the same (treated fumed silica). Formulators report a treat-rate swap within ±20% of the Grace grade. Always run a parallel batch test before lock-in.
+What’s the price difference?
SEMISIL H100 is supplied direct from Chinese manufacture (HMMAT®, MINMETALS EAST). Pricing typically lands 30 – 45% below Grace’s landed cost into Asia and the Americas. Exact quote depends on volume and Incoterms.
+How is supply continuity vs Grace?
MINMETALS EAST holds 2 – 3 months of buffer inventory on H100 to cover Chinese New Year and typical ocean-freight lead-time. Grace’s European production has had occasional allocation pressure since 2022.
+Can I get samples for evaluation?
Yes — 5 kg evaluation pack ships within 5 business days (FCA Shanghai). Request via the form below.
+Does SEMISIL H100 carry the same regulatory listings as Grace SYLOID® C812?
H100 is registered under standard silica CAS 7631-86-9 with surface modification reported. It is REACH-registered and meets typical food-contact (FDA 21 CFR 175.300 for the inert silica fraction) requirements when used within recommended dosages. Specific approvals (cosmetic, pharma) should be requested for your end use.
+Which is better for waterborne coatings?
SEMISIL H100’s untreated-base structure disperses cleanly in waterborne PU and acrylic without conductivity issues. Grace SYLOID® C812 performs comparably but may require slightly higher dosage in waterborne for the same gloss target.