Foam core is a silicone based adhesive that works well on EPP and EPO foam. It is crystal clear and clears to a more flexible consistency than CA. Can be applied to both pieces allow to dry for about ten minutes, to speed curing time. Accelrator does not work with Foam cure. 
 It is good to glue things to foam such as canopy, wood or plastic. It  does require exposure to air for drying,