PURPOSE: To obtain the titled composition useful as coating compound and adhesive, having improved bond strength to glass and water resistance, consisting of an ultraviolet-curing resin resin of radical polymerization type and a specific photopolymerization initiator.

CONSTITUTION: An ultraviolet-curing resin of radical polymerization type (e.g. epoxyacrylic oligomer, trimethylolpropane trimethacrylate, etc.) is blended with a bis [(alkoxysilyl) alkyl] disulfide [e.g. compound shown by the formula (R1 and R2 are 1W4C alkyl; R3 is 1W4C alkylene; n is 0, 1 or 2), etc.] or a tetrasulfied compound as a photopolymerization initiator to give the aimed composition. The amount of the photopolymerization initiator used is preferably 0.5W10wt% based on the total amount of the ultraviolet-curing resin of radical polymerization type.