Add stiffness to composite sandwiches without adding a lot of weight. These cores are lighter in weight than balsa wood and aluminum honeycomb cores, but not as strong. Their cross-linked foam polymers, however, make them stronger and more durable than PET foam cores. All of these cores are moisture resistant and offer good sound insulation. Use them in composite layups, structural panels, partitions, and industrial tanks.

Scored cores have cuts in a grid pattern that make them easier to bend and form into complex shapes than plain cores.