... density,hard surface 2.waterproof, mould proof 3.Durability 4.billboard use PVC foam board : PVC Foam Board Introduction: ... .2. Fire retardant and self-extinguishing.3. Heat preservation. 4. Sound-insulated.5. Insulation.6. Non-corrosion.7. Non ... Foam BoardSpecifications: Thickness (mm): 2 - 32Width (mm): 1220, 2050Length (mm): 2440, 3050Color: white, black, red, blue, yellow, green, gray 4 mm PVC Foam Board