Abstract: An aqueous coating material for use in an in-mold coating process in which a coating material is applied to an inner wall of a cavity within a mold to form a coated film, and a filler material is then injected into a gap between this coated film and an object to be treated, thereby forming a coating of the filler material on the surface of the object to be treated, with the coated film being formed as the outermost layer. Wherein the aqueous coating material includes water and a film forming aid, such that 10 g of the aqueous coating material placed in an acrylic pipe having a height of 1 m and an inner diameter of 34 mm and a pressure in the acrylic pipe is reduced to form a foam, the foam rises to a height that is at least 400 mm.

Abstract: A soft polyurethane foam which has a rebound resilience percentage of not higher than 30% and whose temperature dependency of a compression force deflection that is represented by a difference between a 25%-compression force deflection value at -20.degree. C. and a 25%-compression force deflection value at +20.degree. C. is not larger than 0.030 kg/cm.sup.2.