Foamcore does not adhere well to some glues, such as superglue, and certain types of paint. The foam tends to melt away and dissolve.  Some glue works well in casual settings, however, the water in the glue can warp the fibers in the outer layers. Best results are typically obtained from higher-end spray adhesives. A hot glue gun can be used as a substitute, although the high viscosity of hot glues can affect finished projects in the form of board warping, bubbles, or other unsightly blemishes.
This page contains all about Foam Core Poster Board 24 X 36.