Abstract: A high viscosity fluid composition having a specific gravity of 1 or more, the physical properties of said fluid composition is not impaired for the use of a long period of time, and a vibration energy damping device which is filled with said high viscosity fluid composition. The high viscosity fluid composition comprises a high viscosity hydrocarbon fluid and an inorganic filler.

Abstract: The present invention provides a packing inside bag for a semisolid viscous material which is constructed by folding one rectangular blank sheet an inner surface of which has release properties, said inside bag being characterized by comprising a rectangular bottom surface 1 formed so as to fit to an outside box, and a front wall 3, a rear wall 3a and pairs of side walls (8, 8a and 9, 9a) which are uprightly raised along the four side edges of said bottom surface 1, said inside box being constructed by folding said blank sheet so that first lugs A, A' extending uprightly along the centers of said side walls may be put on said opposite side walls, and so that second lugs B, B' may be formed which are composed of irregular quadrilaterals extending outward via folds 4, 5 in parallel with said bottom surface from the opposite side edges thereof, said irregular quadrilaterals being formed by putting triangle portions D, D' on extensions C, C' of said first lugs A, A'.