Carbon-Core Lightweight Composite Honeycomb Core Materials and Structures Plastic honeycomb, lightweight panels, core material, lightweight core material, plascore, coosa, matline, laminated panels, fiberglass panels, transom compound, boat repair, boat building, marine industry, honeycomb Carbon-Core manufacturer of lightweight, high strength, sandwich core materials and structures offering high impact core resistance, low water material absorption, high dimensional thermal stability, sound and thermal insulation.