American Society for Testing and Materials (ASTM). Current edition approved Dec. 1, 2011. Published January 2012. Originally approved in 1977. Last previous edition approved in 2008 as D3574 – 08. 29 p. These test methods apply to slab, bonded, and molded flexible cellular products known as urethane foams. Urethane foam is generally defined as an expanded cellular product produced by the interaction of active hydrogen compounds, water, and isocyanates.