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Fasco Epoxies

Fasco Epoxies Cab-O-SIL Fumed Silica thickener Quart

  • Based on 1,141 reviews
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Availability: In Stock.
Fulfilled by Amazon
Arrives Thursday, Oct 8
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Size: quart


Features

  • TURN THIN EPOXY INTO A HIGH-STRENGTH ADHESIVE Fasco Cab-O-SIL Fumed Silica transforms low-viscosity epoxy, polyester resin, vinyl ester resin, silicone, paints, and coatings into a smooth, non-sagging mixture ideal for bonding, filleting, gap filling, and structural repairs.
  • PROFESSIONAL MARINE & COMPOSITE APPLICATIONS Ideal for fiberglass repairs, boat building, marine maintenance, woodworking, automotive fiberglass, composite construction, mold making, and general industrial projects. Creates strong fillets and vertical repairs without excessive sagging or running.
  • CUSTOMIZE THE CONSISTENCY YOU NEED Add small amounts gradually to achieve anything from a brushable coating to a peanut butter-like structural adhesive. Perfect for filling gaps, creating fillets, bonding joints, and repairing cracks while maintaining excellent workability.
  • WORKS WITH MOST EPOXY & RESIN SYSTEMS Compatible with epoxy resin, polyester resin, vinyl ester resin, gelcoat, silicone, paints, varnishes, and coatings. Can also be combined with fiberglass fibers, milled fibers, microballoons, and other fillers to create custom repair compounds for demanding applications.
  • PREMIUM FUMED SILICA FOR CONSISTENT RESULTS Lightweight, high-purity hydrophilic fumed silica provides reliable thickening, improved stability, and excellent performance for marine, woodworking, automotive, and composite repair projects.

Brand: Fasco Epoxies


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


Material: Silicon Dioxide (Silica)


Item Form: Powder


Special Feature: Thixotropic


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


Item Form: Powder


Other Special Features of the Product: Thixotropic


Container Type: Pail


Viscosity Level: High


Water Resistance Level: Not Water Resistant


Compatible Material: Epoxy Resin, Paint, Silicone


Item Package Quantity: 1


Volume: 1 quarts


Material Type: Silicon Dioxide (Silica)


Color: Clear


Brand Name: Fasco Epoxies


Model: FIL01Q


Unit Count: 128 Fluid Ounces


UPC: 819794020756


Number of Pieces: 1


Global Trade Identification Number: 56


Manufacturer: Fasco Epoxies Inc.


Part Number: FIL01Q


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Oct 8

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

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Top Amazon Reviews

    • Worked Great for boat gel coat repair
Great value and worked perfectly with my gel coat repair kit for my boat. Turned out good and mixed well.
Reviewed in the United States on March 25, 2026 by Jake
    • Great product
Great quality, easy to use, and great value
Reviewed in the United States on April 27, 2026 by Heather Stewart
    • Good stuff don't inhale it.
Works great for thickening up fiberglass rosin when you don't want it to drip leak or run. Use it on vertical body work. You might want to use a mask when using it, it tends to fly around in a breeze.
Reviewed in the United States on April 12, 2026 by G.Mac
    • Its great but it takes a ton of it to thicken resins
As far as quality and end results its great. My only complaint is that it takes a massive amounts of this to thicken to a putty. Its not a quality thing, its just something you need to know. It took about a third of the quart to thicken just 4oz of resin to a putty consistency. For smaller jobs this may be a non-issue, but when its something bigger, like a boat in my case, it would cost a fortune of it to use this for all the areas I need to use it for. ... show more
Reviewed in the United States on February 21, 2026 by Jay
    • Use less than half your resin volume
Works good , don’t use too much. Use a little less than half the volume of epoxy. Example: if you are using 8oz of resin use less than 4oz of cabosil. Start with 2oz of cabosil than gradually mix in more without going over halfway point of resin volume, good luck!
Reviewed in the United States on February 19, 2026 by Rikirud
    • Great thickener for JB Weld!!
Excellent product! I use it to thicken JB Weld! The plus side is that it actually strengthens JB Weld! Also, great for epoxy.
Reviewed in the United States on April 22, 2026 by Albert H Fortman
    • Arrived fast
It's the gold standard for glass work
Reviewed in the United States on May 27, 2026 by Robert J Fenske
    • No lumps Silica
No lumps like other silica
Reviewed in the United States on June 6, 2026 by Michael Hill

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