As a strong, lightweight, and buoyant alternative to solid panels, these aramid honeycomb cores are used to make interior wall panels and floor boards in marine, structural, and industrial applications. Compared to aluminum honeycomb cores, they're lightweight and more flexible, so you'll often find them lining boats and high-speed cars. However, they’re not as strong as aluminum cores. Aramid cores also resist flames, self-extinguish without melting or dripping, and are thermal and electrical insulators. Aramid is commonly known as Nomex.