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