The thicker viscosities are also useful, often in conjunction with mat or chopped fiberglass, as a covering and reinforcement for rigid foams such as Styrofoam . Use sparingly, excess KBC can thin the mix. It is used primarily for reducing demolding and set times, and is also useful for making a quick-set patching putty. Stir 30 seconds. Amount of XLR-8 to be added is figured as a percent of the total weight of the mix.
Percentages are approximate.
It may also be used as a release agent for rigid polyester molds. Then, using a second, clean piece of terry cloth, rub off the SEPR-8 leaving a thin film. Repeat the above procedure for a second time. Then proceed as usual, applying the Aqua-Resin mix to the mold. Working with rigid molds requires that the cast part have no undercuts.