Search  for anything...

Fasco Cab-O-SIL Fumed Silica thickener in Quart tub

  • Based on 736 reviews
Condition: New
Checking for the best price...
$12.99 Why this price?
Save $5.99 was $18.98

Buy Now, Pay Later


As low as $3 / mo
  • – 4-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, PayTomorrow, Affirm, Afterpay, Apple Pay, and PayPal. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Free shipping on this product

This item is eligible for return within 30 days of receipt

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.


Availability: In Stock.
Fulfilled by Amazon

Arrives Aug 25 – Aug 26
Order within 12 hours and 54 minutes
Available payment plans shown during checkout

Features

  • Cabosil Also called fumed silica, it is a hydrophilic silica powder, a lightweight material that is easy to use and can be added to any application
  • 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.

Brand: Fasco Epoxies


Specific Uses For Product: Craft, Repair, Woodworking, Furniture, Wood, Table Top Coating


Material: Silicon Dioxide (Silica)


Compatible Material: Epoxy Resin, Paint, Silicone


Item Form: Powder


Is Discontinued By Manufacturer ‏ : ‎ No


Product Dimensions ‏ : ‎ 4 x 4 x 6 inches; 3.84 ounces


Item model number ‏ : ‎ FIL01Q


Date First Available ‏ : ‎ August 19, 2017


Manufacturer ‏ : ‎ Fasco Epoxies Inc.


Best Sellers Rank: #10,092 in Industrial & Scientific (See Top 100 in Industrial & Scientific) #52 in Desiccants


#52 in Desiccants:


Customer Reviews: 4.7 4.7 out of 5 stars 736 ratings


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Aug 25 – Aug 26

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Like it
Works great as an epoxy thickener. I have no tools to confirm but I feel the epoxy gets stronger with it. Works great for fillets in thin epoxy.
Reviewed in the United States on July 19, 2025 by Amazon Customer

  • Great Thickener for Resin
Super powdery but worked to thicken my Poly resin. It was a jetski fix underneath and without this I couldn't have thickened my mix into a paste for spreading on. I kept mixing it in until I had the right thickness.
Reviewed in the United States on June 28, 2025 by Heather Spuhler

  • It works
Works perfectly. I used it to bulk up marine epoxy.
Reviewed in the United States on June 9, 2025 by Amazon Customer

  • Epoxy potting of electric motor stator...
Useful for potting an electric motor stator in epoxy resin for optimal heat exchange, preservation of hardened resin integrity and waterproofing. WEAR a good facemask to avoid breathing this extremely fine ground product!
Reviewed in the United States on July 16, 2025 by Michael J. Horoda

  • Thickens
This thickens epoxy well. But to get it into a paste, you will go through this extremely fast. If you only add a bit, like 5%, it won't really increase the sandable quality enough.
Reviewed in the United States on July 22, 2024 by Johnny

  • Good product and affordable.
It does what it said.
Reviewed in the United States on March 23, 2025 by Joseph F.

  • I'm Told It's Great on Dry Flies!
I fly fish. I understand it's great for drying out flies. Too early in the season to tell!
Reviewed in the United States on March 12, 2025 by NE-Phil

  • Great Product!
Great product! Great for making adhesive with resin for boat build! Highly recommend!
Reviewed in the United States on September 26, 2024 by Charles David Kepley Jr

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...