Mixing Instructions for Epoxy Systems


ResinLab epoxy systems are typically in a two-component format containing a resin and a hardener. The resin can be a thin liquid or can be highly viscous. The high viscosity resins contain fillers, which can settle to the bottom of the container. A resin that has settled out will need to be mixed to a homogeneous consistency prior to introducing the hardener. Hardeners are usually a polyamine, but can also be an anhydride. Hardeners may also require mixing before use if settling has occurred.


Surface Preparation

Things to consider prior to mixing your epoxy system regarding surface preparation:


Mixing the Epoxy System

After creating a homogenous resin and hardener, blending of the A/B system can occur:

Reaction rates are typically stated in the technical data sheets as a temperature/mass variable. (ex: 25 minutes / 100 grams). If you are creating a larger mass the reaction rate will be shorter because the system will generate its own heat. Lower masses or a thin film will have a longer rate. If your starting temperature is higher than what is on the TDS your reaction speed will also be faster.

The video below explains how to fix filler settling and material separation prior to using an epoxy system:



Epoxy System Molding

If you plan to mold with an epoxy system, a typical mold is made from RTV silicone and will require a mold release to be applied prior to molding with the epoxy. The silicone molds without a mold release will bond to your epoxy casting.

An option to not having to use a mold release is to have a mold made from urethane:

Another option is to use Johnson’s Paste Furniture Wax. The wax can be applied to a warm mold and will provide the needed barrier protection between your mold and the epoxy casting. The wax can also be mixed with mineral spirits to create a spray mold release.


Contact us with any questions you may have for the proper use of your epoxy system.


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