React-Shun solvent only. If you forget to close the lid on your React-Shun bottle and too much of the solvent evaporates, this is to replace that and get your material back to the correct concentration. the solvent in the React-Shun resin barrier evaporates. The ideal concentration for most people is when fully settled, the white material is about 18 - 20% of the liquid in the bottle. You can check and estimate this using a ruler.
React-Shun is formulated with this carrier so that it dries so fast that it will not drip and it leaves a completely even coating over your entire part. Runs or streaks can show up in your castings or waxes depending on how dialed in your system is.
NOTE: THIS PRODUCT ONLY CONTAINS THE SOLVENT AND IS NOT THE COMPLETE RESIN BARRIER CHEMICAL.