How to choose the right fumed silica grade for coatings?

Use SEMITECH's Product Finder to filter by industry (Coatings & Inks), need (Rheology Control, Anti-Settling, or Gloss Reduction), and product type (Hydrophilic or Hydrophobic Silica). The tool recommends matched grades with technical reasoning.

What is the difference between hydrophilic and hydrophobic fumed silica?

Hydrophilic fumed silica has surface silanol groups (Si-OH) suited for water-based and polar systems. Hydrophobic grades are surface-treated with HMDS, DDS, or PDMS for non-polar systems like silicone rubber and solvent-based coatings.

What silicone fluids does SEMITECH offer for LSR and RTV systems?

SEMITECH's MESIL® range covers vinyl silicone fluid (Vi-PDMS, 20–20,000 cSt) as LSR base polymer, hydrogen silicone oil (0.18–1.58% Si-H) as crosslinker, hydrogen-terminated PDMS (THF series, MW 6k–15k) as chain extender, and silanol-terminated PDMS (OH polymer, 750–550,000 cSt) for RTV sealants and condensation cure systems.

Which anti-corrosion pigment should I use to replace chrome yellow?

SemiJun® JP-8018 (Molybdate/Chromate alternative) and JP-B808 (Zinc Phosphate) are the recommended chrome-free replacements. Both comply with heavy metal standards and are suitable for high-gloss industrial and automotive primer systems.

What silicone emulsions are available for textile finishing?

SEMITECH offers the MESIL® TX series (amino-modified, 30–63% solids) for fabric softening across cotton, polyester, and nylon, and the MESIL® EM series (non-ionic PDMS emulsions, 350–1,000,000 cSt) for mold release, lubrication, and polish applications.

Can I get a free sample from SEMITECH?

Yes. After finding your matched product in the Product Finder, click View Specs to access the product page, or contact SEMITECH engineering at semitechnm.com/contact-us/ for free 200g–500g R&D samples dispatched within 48 hours.

Selection Guide — Find Your Product

Select your industry, formulation need, and product type. We'll recommend the best SEMITECH solution with a technical explanation.

All steps are optional. Select one or more filters to find matching products.

Step 1

Your Industry

Coatings & Inks Silicone & Sealants Composites Batteries Epoxy Flooring Anti-Corrosive Textile Oral Care Personal Care

Step 2

Your Need

Rheology Control Reinforcement Gloss Reduction Anti-Settling Flow Aid Conductivity Crosslinking Softening Waterproofing Corrosion Protection Release Agent

Step 3

Product Type

Hydrophilic Silica Hydrophobic Silica Matting Agent Conductive Powder Precipitated Silica Anti-Corrosion Pigment Reactive Silicone Silicone Emulsion Amino Silicone Oil

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