Vinyl Foam: Divinycell 5 lb. DensityLooking to make a strong composite part? DIAB closed cell vinyl foam is an ideal sandwich core where ultimate laminate strength is critical. With compressive strengths over 200 psi, the 5 lb. cubic foot foam offers more strength to a laminate than other lightweight core materials, like honeycomb, while adding only slightly more weight. Because it is still significantly lighter than other traditional options, 5 lb. foam is used extensively in high