Top 10 Best fumed silica powder in 2026

Main highlights

• •Optimal Solution: Fiberglass Supply Depot Inc.’s colloidal silica is a must-have product for those of you who want to work with smooth, non-saggy epoxy resin. This product acts as a premium thixotropic agent that allows you to control the viscosity of mixed epoxy systems.
• •Easy to Use: This epoxy thickener is designed to be used alone for a smooth and non-sagging high-strength mixture. Additionally, it can also be combined with fillers or fibers to prevent them from sagging.
• •Designed for Resin: This fumed silica is formulated to provide sag resistance, as well as anti-settling and anti-corrosive performance. Our colloidal silica ensures high shelf stability and mechanical reinforcement in epoxy coatings.
• •Small Size: Our fumed silica comes in a 4oz package and can be mixed with other fillers to create custom blends. Cabosil can be added to any type of resin mix and simply stirred by hand.
• •Technical Features: This Cabosil filler may be synthesized by high temperature hydrolysis of SiCl4 in O2(N2)/H2 flame. The formula is amorphous and it possesses a very high specific area. The microdroplets of amorphous silica fuse into a branch and form a chain-like agglomerate, which helps to thicken the resin mixture.

Main highlights

• •Thickener - Thickening powder for epoxy, silicone, paints, varnishes, and liquids significantly increases the viscosity of the liquid and produces a non-sagging property
• •Strong Adhesive - Fumed silica has strong stability, making it easy to strengthen gel coat, epoxy, polyester, paint and so on; It is also used to make ceramic blanket rigidizer
• •Multi Usage – Cabosil is suitable for thickening epoxy resin; Additionally, it is suitable for rubber reinforcement, and can also be combined with fillers or fibers to prevent them from sagging
• •Hydrophilic surface

Main highlights

• •100% Pure - Professional fumed silica, hydrophilic silica powder with a specific surface area of 200, is a lightweight material that is easy to use and can be added to any application with just hand stirring, also known as gas-phase silica or colloid.
• •Paint Thickener - Thickening powders for epoxy, silicone, paints, varnishes, and liquids significantly increase the viscosity of the liquid system and produce non-sagging properties. TITGGI fumed silica is an excellent touch-changing agent.
• •Strong Adhesive - Fumed silica is highly temperature resistant, has strong stability, creates non-sagging properties, can repair holes & thicken sailboat hull gel coat, it is also to make ceramic blanket rigidizer.
• •Multi Usage - Fumed silica suitable for thickening epoxy resin for dreamer and resin art. Additionally, it is suitable for rubber reinforcement, and can also be combined with fillers or fibers to prevent them from sagging.
• •Look for TITGGI fumed silica powder to achieve unparalleled results in your projects. With its fine, lightweight particles, TITGGI fumed silica ensures optimal dispersion and superior effectiveness, making it an essential ingredient for high-quality applications. Trust TITGGI for precise, reliable results and elevate your work to the next level.

Main highlights

• •Premium Epoxy Thickener: Also referred to as colloidal or hydrophilic fumed silica, our silica thickener is an excellent thixotropic agent designed to work as an epoxy resin thickener
• •Measure And Mixing: Mix the appropriate amount of resin, Part A, and hardener, Part B, then add silica thickener in increments, and mix thoroughly, stirring from the bottom to the top until the desired consistency is reached
• •Features: Silica thickener easily mixes into epoxy resin systems
• •Consistency: Fumed silica powder can be used alone to create a very smooth, non-sagging, high-strength epoxy mixture, but can also be combined with other fillers or fibers to prevent sagging
• •Cleanup: Clean hands, exposed skin, and work surfaces with mild soap and water

Main highlights

• •Thickening Agent: Elevate the performance of epoxy, resins, paints, and more with Cabosil fumed silica, designed to enhance viscosity and texture without altering the chemical composition
• •Industrial and DIY Use: Perfect for use in aerospace, automotive, marine, and flooring applications. Cabosil improves the strength, stiffness, and heat resistance of composite materials like fiberglass and carbon fiber
• •Produced by Cabot: Backed by over a century of expertise in material innovation and commitment to quality. Cabot ensures consistent performance in every use
• •Easy to blend: Cabosil allows for smooth blending into both aqueous and non-aqueous solutions, to achieve the desired thickness with minimal effort
• •Safe and Reliable: Manufactured adhering to the highest standards, Cab-o-sil is non-toxic, and suitable for a wide range of professional and personal projects.

Main highlights

Main highlights

• •Optimal Solution: Fiberglass Supply Depot Inc.’s colloidal silica is a must-have product for those of you who want to work with smooth, non-saggy epoxy resin. This product acts as a premium thixotropic agent that allows you to control the viscosity of mixed epoxy systems.
• •Easy to Use: This epoxy thickener is designed to be used alone for a smooth and non-sagging high-strength mixture. Additionally, it can also be combined with fillers or fibers to prevent them from sagging.
• •Designed for Resin: This fumed silica is formulated to provide sag resistance, as well as anti-settling and anti-corrosive performance. Our colloidal silica ensures high shelf stability and mechanical reinforcement in epoxy coatings.
• •Large Size: Our fumed silica comes in a 1-quart package and can be mixed with other fillers to create custom blends. Cabosil can be added to any type of resin mix and simply stirred by hand.
• •Technical Features: This Cabosil filler may be synthesized by high temperature hydrolysis of SiCl4 in O2(N2)/H2 flame. The formula is amorphous and it possesses a very high specific area. The microdroplets of amorphous silica fuse into a branch and form a chain-like agglomerate, which helps to thicken the resin mixture.

Main highlights

• •Hydrophilic fumed silica, also known as cabosil or colloidal silica, is a thixotropic additive thickening agent that lets you customize the viscosity of epoxy, polyester resin, paint and more
• •Epoxy thickened with this fine silica powder won’t sag or slump, ideal for vertical and overhead surfaces. Easy to stir into mixed resin and hardener, and easy to sand upon full cure
• •It creates a smooth, strong epoxy compound ideal for bonding, filleting, and filling. Epoxy or polyester resin thickened with silica can be used to fill holes, cracks, and gaps
• •Combine this versatile filler with TotalBoat epoxy and Glass Micro Balloons or Milled Glass Fibers for easy sanding and additional strength
• •Use with gelcoat, paints, acrylics, silicones, rubber, urethanes, adhesives and other materials to prevent sagging. Available in 1 Quart and 5 Quart sizes

Main highlights

• •Great for flying fishing lures
• •Perfect for loads of refills for smaller containers
• •Great to buy and share/split with friends
• •Odorless and non-toxic
• •High quality fumed Silica