The Dynarex Poly Mixing Pads with Foam Back (1800 Sheets/Case) is made of poly-coated sheets that can be used to mix cements, composites, rubber-based materials and silicates during any dental procedure. The poly-coating on each sheet, ensures there is no penetration between sheets during use. Each pad has a non-skid foam backing to provide a secure placement, and is available in three size choices.