Epoxy Fillers

Manufacturer of Epoxies

Epoxy fillers are a powdered material that you add to an epoxy system in order to impart specific and desired physical characteristics depending upon the application used for the system. Each particular filler possesses its own unique set of physical attributes, however their use in an epoxy system can be loosely placed into two general categories:

• High Density Fillers
• Low-Density Fillers

Interested in purchasing our fillers? Check out our custom manufactured fillers. Contact us today for custom ordering. Depending on the type of project, certain epoxy fillers will work better than others. We can work with you to match your desired specifications.

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High Density Fillers

High-density fillers are used in the manufacturing of strong, but hard-to-sand systems. These systems are used mostly in structural applications like bonding, adhesion and reinforcement.

Low Density Fillers

A low-density filler is used in light and easily sanded epoxy systems that are applied where the system needs to be shaped, filled or faired due to cosmetic reasons.

What Are Epoxy Fillers

Epoxy fillers are used to thicken liquid epoxy for various reasons. Reasons other than coating or wetting out fiberglass. With fillers, you can use one epoxy system for different applications, such as adhesive bonding, fairing, gap filling, and filleting. All of that instead of buying a separate resin for each. The most notable applications for epoxy fillers pertain to boat building and repair, household projects, and woodworking.

Tip on How to Add an Epoxy Filler

If you are purchasing filler for epoxy systems, you likely know how to use it. But here are some common tips on the best way to add an epoxy filler.

• Before adding an epoxy filler, thoroughly mix together the epoxy resin and hardener components. Do so according to the mix ratio specified, otherwise the filler may not work the way you want it to.
• When working with epoxy and adding epoxy fillers and sanding cured epoxy, it is important wear proper safety gear. While doing this work, you do not want to breathe in any of the fumes, filler particles or dust.
• Stir fillers in gently to keep the particles from becoming airborne.
• If you are combining more than one filler in your mixture, stir each one in thoroughly before adding another. Do not try to stir multiple fillers all in at once.
• Any added epoxy resin filler or thickener may affect the pot life or working time of the epoxy. Epoxy fillers can increase the volume of material, which shortens the working time of the epoxy, and adds to the exothermic reaction. We recommend testing a small batch before using the filler on your actual project to make sure it is working as you expect.
• If you are planning on adding colloidal silica to a mixture containing other epoxy fillers, it is recommended to add the colloidal silica last.
• Adding filler shortens the working time. Due to this, if the epoxy you are using has a slow speed hardener available, then you may want to use it over a fast speed hardener.
• For some applications, the mixture may consume a large amount of fillers or thickeners in order to achieve the desired viscosity and consistency, so you’ll want to work quickly and diligently.