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Product Details

TotalBoat Silica Thickener is an extremely fine powder used to create a smooth, non-sagging, high-strength mixture for structural bonding, filleting, and filling. It can be used alone or in conjunction with Milled Glass Fibers or Phenolic or Glass Microballoons.

To prepare, first mix together the amount of resin/hardener that your project requires. Then add any fiber fillers or bulking agents and mix well. Add silica thickener to the mixture last. Remember to ALWAYS stir bottom to top.

Info & Guides
A 5-quart quantity of Silica Thickener when combined with 1 gallon kit of TotalBoat 5:1 epoxy (group size B), will produce about 1.75-gallons of smooth thixotropic epoxy filler

Reviews for TotalBoat Silica Thickener

10 of 22 Reviews

May 18, 2021

Good Product
By Drew from Hamilton, Ohio

Verified Purchase

Great product and fast shipping

Bottom Line Yes, I would recommend to a friend

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May 10, 2021

TotalBoat Silica Thickener
By Coyote from New London, WI

Verified Purchase

Was very happy with this product. Used to make my gelcoat thicker.

Bottom Line Yes, I would recommend to a friend

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April 10, 2021

Great thickener for me.
By Mark aka Randy California the drummer from NIagara Falls, NY

Verified Purchase

I use it mainly as a thickener for vertical layups and also for "gluing" support pieces together. It's very uniform and mixes in easily.

Bottom Line Yes, I would recommend to a friend

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April 9, 2021

Good product -Did some of what I wanted
By Ocala Joe from Ocala FL

Verified Purchase

I used the product to thicken the epoxy I was putting on so that I could slope it. It got thicker but I did not use enough and it still ran. Apparently, you have to use quite a bit to get it to thicken and become more solid than liquid but still pliable. Instructions would have been helpful. It makes it easier to sand but not by much. The epoxy is so hard, I had to use a grinder disk on my oscillator to lower some high spots.

Bottom Line Yes, I would recommend to a friend

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January 17, 2021

I don't use this unless I need to thicken laminate.
By Comedy Bob from Lafayette, Indiana

Verified Purchase

This product is very fine and being silica I am very careful not to breathe when using, so I use less.

Bottom Line Yes, I would recommend to a friend

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October 26, 2020

Quality stuff for small order
By brew from billings, Montana

Verified Purchase

Well packaged, no leaks product worked great for small repairs, quick shipping, great vendor.

Bottom Line Yes, I would recommend to a friend

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August 17, 2020

Good stuff
By Hold fast marine from Barre ma

Verified Purchase

It does what it's supposed to, thickens real nice. A WARNING to anyone who wants to use this. WEAR A RESPIRATOR!!!!. Silica will kill you if it gets into your lungs! This stuff is a fine powder and gets everywhere.


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May 11, 2020

I Would buy this product again
By Gguy from Virginia

Verified Purchase

Used to mix with TB 5/1 epoxy to make repairs to a 22 foot Columbia

Bottom Line Yes, I would recommend to a friend

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March 30, 2020

I would buy this product again.
By Billfisher72 from Springfield, LA

Verified Purchase

Works for its intended purpose. Mixes very well with epoxy.

Bottom Line Yes, I would recommend to a friend

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March 24, 2020

Great deal
By Ober from Nortern Minnesota

Verified Purchase

This is the best deal I've found on quart size silica thickeners. Great price plus free shipping because it's a Total Boat product. Everything I've ever ordered from Jamestown/Total Boat comes well packaged so it arrives in good condition. Jamestown has certainly been good to deal with everytime I've orded from them.

Bottom Line Yes, I would recommend to a friend

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