A dense white block specifically manufactured for manual sculpting. You can "rough out" your design with hot knives and use rasps for fine details. Available at United Art & Education for $19.99. FloraCraft Desert Foam Blick Art Materials& more Go to product viewer dialog for this item.
For detailed carving and fine lines, you need high-density rigid foams that won't crumble under carving tools or sandpaper. buy foam blocks
CNC and Modeling Foam (Rigid Polyurethane Foam) - High Density 4lb/ft3 Etsy - Seller Go to product viewer dialog for this item. A dense white block specifically manufactured for manual