NOVELTY - Sealing composition comprises a rubber component, polyolefin and hygroscopic compound, where the rubber component comprises butyl rubber and polyisobutylene having a viscosity average molecular weight of 500000-3000000, the mixing ratio of the rubber component to 100 parts by weight of the total amount of the rubber component and the polyolefin is 40-90 parts by weight, and the sealing composition comprises 0-30 parts by weight of hygroscopic compound with respect to 100 parts by weight of the total amount of the rubber component and the polyolefin.    USE - The sealing composition is useful for sealing an end portion of multiple glass or a solar cell panel (all claimed).    ADVANTAGE - The sealing composition: easily and efficiently seals multiple glass and solar cell panel; exhibits excellent insulation property, water resistance, water vapor barrier property and durability; provides solar cell panel which prevents reduction in power generation; and provides a seal material that can be prevented from extruding the end portion when the same is melted by heating.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for:    (1) multiple glass comprising: two glass layers arranged at an interval from each other in the thickness direction; an intermediate layer (6) provided between the glass layers and arranged inside end portions (5) of the glass layers; and a sealing material (1) (made of the sealing composition), filled into the gap between the end portions of the glass layers to seal the intermediate layer; and    (2) a solar cell panel comprising: a glass layer; a support layer arranged at an interval from the glass layer in the thickness direction; a solar cell element provided between the glass layer and the support layer and arranged inside end portions of the glass layer and the support layer, and a sealing resin layer sealing the solar cell element; and a seal material (made of the sealing composition), filled into the gap between the end portions of the glass layer and the support layer to seal the sealing resin layer.    DESCRIPTION OF DRAWING(S) - The figure illustrates a sectional view of multiple glass.    Seal material (1)    End portions (5)    Intermediate layer (6)    Upper-side glass layer (10)    Lower-side glass layer (11)