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Product Details

MAS Cab-O-Sil Epoxy Filler is a fumed colloidal silica additive which thickens mixed epoxy, making it ideal for all types of filleting, filling, surfacing, and bonding. Cab-O-Sil hardens to a high-strength, high-density solid that is tough and durable, making it more difficult to sand and shape compared to other epoxy fillers.

Reviews for MAS Cab-O-Sil Colloidal Silica Epoxy Filler

3 of 3 Reviews

September 8, 2016

good stuff
By weldor from albuquerque nm

Verified Purchase

excellent product

Bottom Line Yes, I would recommend to a friend

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May 3, 2016

I will buy this product again.
By Mark from Ellenton FL

Worked the way I needed to for verticals on poured in place rubber. We will definitely be buying more. Quick shipment as well. We are very happy.

Bottom Line Yes, I would recommend to a friend

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September 15, 2013

This is great stuff!!!
By HappySailor from North Miss...

This is great stuff, similar if not the same as West 406, but a TON cheaper... The ½ gallon tub makes it so much easier to dispense instead of pouring from a small cardboard tube like the 406 comes in. I keep a small beaker in each tub to add to the resin cups... Easy to mix, and very forgiving on the ratio... Mix in consistencies from syrup to peanut butter for your application. I've used it to fill voids ground out in the hull, adhering layup/constructed parts and panels, and making fillets. I've also used a quick shot of spray enamel to give the mix a color without any adverse effects. Easy to smooth out with a gloved finger, mixing stick or spreader. This stuff cures to a rock like hardness, but is not too difficult to sand if you have to. Filling voids is definitely easier if you don't get excess outside the void... Fair with phenolic after this step... Overall... Great stuff!!!

Filled hull voids
Filled ground out stress cracks before glassing
Bottom Line Yes, I would recommend to a friend

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