Penefil 375 H is a two-component, water blown, closed cell, rigid, slab-jacking foam designed to raise and stabilize concrete foundations in commercial and industrial uses. Penefil 375 H is a hydrophobic 3.75 pcf polyurethane polymer, which provides powerful and steady lifting for heavy slabs. Penefil 375 H cures quickly and provides longer-lasting stability for higher dead-weight loads.