- Fumed silica thickens epoxy and polyester resin systems to prevent sagging or slumping on vertical and overhead surfaces
- Creates a smooth, strong filleting compound
- Cured surface is extremely hard and abrasion resistant
- Creates secure structural bonds on porous and non-porous surfaces
- Fills holes and gaps
- Always wear proper safety protection when blending Silica Thickener or other fillers into mixed resin/hardener
- Product Color: White
- Cured Color: Dull White
- Sizes: Available sizes include 1 Quart, 5 Quarts, and 10-lb. bag
Where to use TotalBoat fillers
Silica Thickener can be used alone or combined with other fillers to achieve the desired properties. For example, blend into mixed resin/hardener along with TotalBoat Glass Microballoons (sold separately) to allow easy sanding when fairing. Or, combine with TotalBoat Milled Glass Fibers (sold separately) for added strength and sag resistance.
TotalBoat fillers can be used with either epoxy or polyester resins to change the resin properties for various uses, such as bulking out the resin or making it easy to sand. Because fillers can affect the pot life of a resin, create a small trial batch first to determine how much working time you’ll have.
|Glass Microballoons||Milled Glass Fibers||Silica Thickener|
|Fairing||✔||✔ (blended with Glass Microballoons)|
|Filleting||✔||✔||✔ (blended with Glass Microballoons)|
|Vertical Surfaces||✔ (in thick enough concentration)||✔|
|Surfboard or Sailboard Repair||✔|
NOTE: A 5-quart quantity of TotalBoat Silica Thickener combined with the 1 Gallon Kit of TotalBoat 5:1 Epoxy, Group Size B (sold separately), will produce approximately 1.75 gallons of smooth, thixotropic epoxy filler.
Frequently Asked Questions
What is Silica Thickener used with epoxy for?
Silica Thickener is used with epoxy systems and polyester resins as a thickening agent to create a smooth, non-sagging, high-strength mixture for structural bonding, filleting, and filling. It’s best to use Silica when high-strength and low-density are required. Silica is great to mix with epoxy for various uses, like bulking out the resin or making it easy to sand.
Can you sand epoxy with Silica Thickener?
Yes, you can sand epoxy with Silica Thickener. Although it’s not as easily sanded as microballoons, it’s easier than sanding straight epoxy.
Can you mix Colloidal Silica with Microballoons?
Yes, you can mix Colloidal Silica with other fillers, including Microballoons. Oftentimes, using two fillers are more effective than any single filler used alone. You can blend Silica into mixed resin/hardener along with TotalBoat Glass Microballoons to allow easy sanding when fairing.
How much should you add to epoxy when making an adhesive for bonding?
A 5-quart quantity of Silica Thickener when combined with 1 gallon of mixed epoxy/hardener, will produce about 1.75 gallons of smooth, thixotropic epoxy filler.
Can you mix Colloidal Silica with wood flour?
Yes, you can mix Colloidal Silica with wood flour. Adding no more than 30 percent by volume has the benefit of making wood flour fillets smoother and easier to spread.