flex foam-it! iii flexible polyurethane foam - trial unit smooth-on warning: keep out of reach of children. do not get into eyes or on skin. do not take internally. do not breathe fumes. use only with adequate ventilation. wear vinyl or nitrile gloves and eye protection when handling this product. review the technical bulletin prior to use for safe handling instruction. flexfoam-it! expanding flexible foams are easy to use and durable. they are lightweight, versatile and most are available in easy to measure mix ratios. they can be used for padding/cushion material, gasket material, or to make props and special effects. vibrant colors can be achieved by adding color pigments.