This 1.6 lb density foam has a fine texture that carves like soft wood and won't crack or split. You can find it at Blick Art Materials for $52.69.
CNC and Modeling Foam (Rigid Polyurethane Foam) - High Density 4lb/ft3 Etsy - Seller Go to product viewer dialog for this item. buy foam blocks
This rigid polyurethane foam from Etsy is dust-free and easy to paint. It provides crisp edges, making it a professional replacement for wood in signage or prototyping. FloraCraft Styrofoam Sculpting Block United Art and Education Go to product viewer dialog for this item. This 1
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. This rigid polyurethane foam from Etsy is dust-free
If your piece needs to be durable, flexible, or wearable, high-density EVA foam is the industry standard. Foam Forge Ultra High Density EVA Foam 50mm Block Walmart - Foam Forge Go to product viewer dialog for this item.
Morning Glory 18" x 18" x 2" High Density Craft and Cushion Foam Go to product viewer dialog for this item.
Specifically designed for floral art, this green foam holds stems and picks securely in place. It is available at Hobby Lobby for $1.99.