General

Epoxy products can only be made fire-retardant at the manufacturing level.  There are currently no materials that can be post-added to our epoxies to make them fire-retardant.

There are two common reasons why the epoxy didn't cure:  incorrect measuring and incomplete mixing.  Measuring and mixing is really easy with most System Three® epoxy systems because they mix at a 2:1 or 1:1 volume ratio, but this doesn’t mean you don’t have to pay attention to what you’re doing. First , read the label or Technical Data Sheet to see what the correct ratio is for the product you are using. Customers will call our Technical Support line suggesting that something is wrong with the epoxy because it didn’t cure properly. We know of no situation where properly-mixed resin/hardener has gone bad or has been contaminated and wouldn’t cure. In the majority of cases, it turns out that the batch was either incorrectly measured or insufficiently mixed. Epoxy chemistry just will not allow it to work any other way.

If you’re working on a project that requires you mix many small resin batches, develop a measuring technique that is sufficiently accurate and stay with it. Doing it the same way each time will minimize the chance for error. 

Yes. The white solid or haziness is a mass of resin crystals. Crystallized resin will not cure properly. To bring the resin back to a usable state, heat the bottle up in a water bath above 125 degrees F until the resin clears up. It will then be ready for use.

We will guarantee the performance of our epoxy products for three years from the date of manufacture, printed on the bottom of the containers, provided they are stored properly. They will probably last much longer, but they should be tested first after the three-year period. The resin may crystallize or the hardener may darken but this does not affect its performance. Crystallized resins should be reheated in a water bath that is 125 F until the resin clears up prior to use in your application.

Appendix A is a section from the System Three Epoxy Book and can be found as a separate file on our website here: Appendix A - Estimating Usage

Yes, we offer a pourable Epoxy Pigment Dispersion specifically formulated to be dispersed in System Three epoxy resins. They are available in 7 standard colors and can be blended with each other to create additional colors. Please check our our blog and product page for more information on these color pigments here.

All other dyes and colorants should be tested by the user to ensure it cures to their satisfaction.

System Three epoxies do not accept stains well and should be applied before the epoxy. In general, oil-based wiping stains can be used so long as they are completely cured before applying mixed epoxy resin. However, it is prudent to do a test by staining some scrap and then applying epoxy. Check for appearance and bonding.

The general rule is that epoxies will bond over cured polyester but polyesters do not bond over System Three epoxies. To get around this problem, we developed a resin system that can be used as a "tie-coat" barrier and is unique in allowing polyester resins and gel coats to be bonded directly over it. This epoxy is called the SB-112 and is available on our website here.

Crystallization occurs when the product is exposed to low temperatures for prolonged periods of time; the presence of any impurities will then initiate the crystallization process. 
System Three products are formulated to resist Crystallization, but it can still occur. 
Heat will bring the resin back to a usable state, and the best way to heat the resin is to place the container in a water bath with water heated to 125°F. 

Yes.  The original System Three® "how to" manual is alive and well on the website.  It is available in downloadable sections, or all at once here.

Epoxy resin adhesives will bond all woods, aluminum and glass well. It does not bond to Teflon, polyethylene, polypropylene, nylon, or Mylar. It bonds poorly to polyvinyl chloride, acrylic and polycarbonate plastics. The only way to tell if an epoxy will bond to a material is to try it. Generally, epoxy adhesives are the best choice for bonding dissimilar materials together. If epoxy bonds to Material A and to Material B it will bond the two materials to each other. The best thing to do is to try it and see for yourself.

Yes, epoxy may be thinned with up to ten percent lacquer
thinner to lower the viscosity and improve brushing. The use of solvents will retard the
cure time somewhat so don’t use any more than needed. Add just
enough thinner to allow the epoxy to brush easily. Never add
solvents to epoxy for gluing or fiberglassing.

Our products are marine or industrial, and not intended for use in applications involving food contact. To claim that a product is food-safe, it must be tested by an independent lab, which we do not do. On the other hand, when some of our two-part epoxy products are properly measured and mixed, then properly cured, they are theoretically inert and would be no more of a problem than many other plastics. But since the accuracy of those processes is beyond our control, we can’t make those claims.