Abstract: This invention relates to a composition and method of removing oleaginous compounds from aqueous systems, both fresh and salt, by employing a composition comprising a volcanic glass and a fibrous material.

Abstract: When a porous substrate such as perlite insulation board is surfaced with a foamed polymer layer formed in place from liquid components, the liquid components will often partially penetrate the surface, resulting in loss of materials and uneven foaming. A barrier coating which can prevent penetration is provided by applying to the porous substrate an aqueous mix of a thermosetting resin which cures through methylol groups, such as urea formaldehyde, with a component containing a hydroxyl group, such as starch, cereal flour, or the like. When the barrier coating is dried, a water insoluble cross-linked surface is formed which is impenetrable to foam constituents. A greater foam thickness is obtained for a given amount of foamable material and a more uniform thickness also results.