SPI ENVELO-POUR™ 2.0 - 30.0 is a closed cell 2.0 lb - 30 lb density is a two component, rigid polyurethane system for pour foamapplications. This foam is low viscosity and is specifically designed for pour operations to produce rigid foam for slabjacking, as well as pole set in lieu of concrete. Other uses include tooling, flotation, mold fabrication, and void filling.