1. The upward movement of asphalt in an asphalt pavement resulting in the formation of a film of asphalt on the surface; usually caused by too much asphalt in one or more of the pavement courses, resulting from too rich a plant mix, an improperly constructed seal coat, too heavy a prime or tack coat, or solvent carrying asphalt to the surface; usually occurs in hot weather; also called Flushing. 2. The autogenous flow of mixing water within, or its emergence from newly placed concrete or mortar; caused by the settlement of the solid materials within the mass; also called Water Gain. 3. In gypsum board, a discoloration, usually at a joint, which may occur on a finished wall or ceiling. 4. Penetration of color from the underlying surface; seeping of a stain or lower coat through the top coat, spoiling the appearance of the top coat. 5. When coloring material from the wood or undercoat works into succeeding coats and imparts to them a certain amount of color; see Extractive Bleeding. 6. Slowly reducing the pressure of liquid or gas from a system or cylinder by slightly opening a valve. 7. The draining or loosening of saturants from the roofing material.