There is no exotherm with Quick Kick and the small amount of resin used in a futures box install. It is the resin draining into the foam and acting as an anchor in the EPS making it stringer. I advise not using AddF when installing the fin boxes as that makes the resin thinner and allows it to drain more.
We also paint the routed pocked and flange with resin as well as the outside surface of the box when installing. Then pour more resin over the flange to fill the ILT box slots and squeegee the excess resin off the flange and onto the foam.