SEMISIL H100 | Fumed Silica Matting Agent for High-Clarity Coatings
Fumed Silica Base

SEMISIL® H100

An advanced untreated fumed silica matting agent with a special structure. Engineered to deliver exceptional transparency, easy dispersibility, and superior chemical stability across diverse coating systems.

Key Features

  • High Transparency: Fumed silica base ensures zero wax hazing, providing the absolute highest clarity for premium clear coats.
  • High Matting Efficiency: Unique spatial structure (BET 230-270 m²/g) maximizes gloss reduction at low dosages.
  • Easy Dispersibility: Highly controlled particle formation allows for rapid incorporation under low shear forces.
  • Chemical Stability & Low Conductivity: Ultra-high purity (SiO₂ ≥ 99.0%) makes it highly chemically inert, ensuring it does not interfere with the conductivity of powder or electronic coatings.

Applications

  • Waterborne / PU Coatings
  • Premium Wood Coatings
  • Printing Inks & Overprint Varnishes
  • PVC Coatings & Powder Coatings

Product Profile & Handling

Unlike standard precipitated silica, SEMISIL® H100 utilizes a high-temperature fumed process. This unique morphology provides distinct advantages in high-end applications.

SEMISIL® H100 d50: 8.0 - 11.0 µm
Recommended DFT: 15 - 35 µm (Medium to Thick Film)
The flagship fumed matting agent. Perfectly suited for high-clarity waterborne PU and powder coatings where traditional precipitated silica might cause hazing or conductivity issues.
💡 Packaging & Storage Tip: SEMISIL® H100 is supplied in industry-standard paper bags. To preserve its high matting efficiency and special structure, we strongly recommend storing the product in closed containers under perfectly dry conditions and protecting the material from any volatile substances.

Physico-Chemical Data

Typical properties for SEMISIL® H100. Backed by rigorous quality control to ensure batch-to-batch consistency in fineness and purity.

Properties & Test Methods Typical Value Unit
BET Specific Surface Area230 - 270m²/g
pH Value (5% aqueous)6.0 - 8.0-
Particle Size (d50)8.0 - 11.0µm
Loss on Drying (2h @ 105°C)≤ 5.0Wt%
Loss on Ignition (2h @ 1000°C)≤ 10.0Wt%
Oil Absorption300 - 380g/100g
Content of SiO₂ (Dry basis)≥ 99.0Wt%
Fineness of Grind≤ 40.0µm

* Typical values only. Not for sales specifications. Refer to COA for batch data.

Frequently Asked Questions

Formulation advice and technical solutions from our R&D engineers.

What is the advantage of a "fumed" matting agent over precipitated silica?

Fumed silica is produced via high-temperature flame hydrolysis, resulting in exceptionally high purity (≥99% SiO₂) and a unique spatial network. This gives SEMISIL® H100 superior optical transparency (zero hazing) and remarkably low conductivity compared to wet-process precipitated silica.

Can SEMISIL H100 be used in waterborne systems?

Absolutely. Because it is untreated and highly pure, SEMISIL® H100 wets out easily and is highly recommended for Waterborne and PU coatings where clarity and chemical stability are critical parameters.

Why is "Low Conductivity" highlighted as a key feature?

In specific applications like Powder Coatings or high-end electronics coatings, ionic impurities can disrupt the electrostatic spraying process or compromise the final film's insulating properties. The fumed nature of H100 ensures minimal ionic content, guaranteeing low conductivity and high chemical stability.

How should SEMISIL H100 be dispersed?

Thanks to its tailored structure, it exhibits excellent dispersibility. We recommend incorporating it using standard high-speed dissolvers (e.g., Cowles blade) under moderate shear. High-energy bead milling is not required and should be avoided to prevent destroying the spatial matting structure.

Alternative Grades

GMATT® 100 Series Untreated Precipitated Silica
GMATT® WB Series Waterborne Specialist

Ready to Test SEMISIL® H100?

Download the full Technical Data Sheet (TDS) and Safety Data Sheet (SDS), or request a complimentary lab sample for your formulation.

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