Fasco Epoxies Cabosil: Fumed Silica Thickener (Gallon Tub)

Overview

Fasco Epoxies Cabosil is a fumed silica thickener packaged in a convenient gallon tub. Designed to increase the viscosity of liquids like epoxy resins, paints, silicones, and varnishes, it helps create a non-sagging, stable film from the first pour to the final cure. The powder delivers a controlled body that can make applications feel more confident, especially on vertical surfaces or complex pours.

Key benefits at a glance

• Thickening performance: raises viscosity to control flow, reducing drips and sag on vertical surfaces
• Adhesive stability: contributes to a stable gel coat and resin mix that stays in place during cure
• Versatile use: suitable for thickening epoxy resin, paints, varnishes, and silicones; also supports ceramic blanket rigidizer applications
• Reinforcement potential: can be used with fillers or fibers to prevent sagging in composite constructions
• Hydrophilic surface: the surface chemistry supports interaction with many liquid systems

Real-world use cases

In hobby or professional setups, users mix Cabosil into epoxy to achieve a thicker, brushable consistency that clings to vertical panels without sliding. It’s also used to modify gel coats, stabilize polyesters, or enhance the body of paints for bulk applications. The texture is light and powdery, making it easy to blend into resin systems with thorough mixing.

Notes on performance:

• The powder is a strong, stable additive that helps improve workability and leveling in complex pours
• Because it is a dry thickener, it blends with minimal clumping when added gradually and stirred thoroughly

How to use

Start with small amounts and increase gradually while mixing thoroughly to reach the desired viscosity. Ideal for projects where control over flow, film thickness, and edge definition matters. Always follow safety guidelines for dry powders.

Quality and handling

The Cabosil powder has a fine, fluffy texture that blends easily into resin systems. Packaged in a sturdy gallon tub, it stores well when kept sealed and kept in a cool, dry place. Pour slowly and mix thoroughly to minimize clumping and achieve consistent results.

Safety and storage

Store in a cool, dry area away from moisture. Use appropriate protective equipment when handling dry powders and follow the safety data sheet guidelines.