It is an object of the present invention to provide a 
sealant for a One prop Fill process which hardly causes a peeling phenomenon between the 
sealant and a substrate in production of 
liquid crystal display device since the 
sealant has excellent adhesion to the substrate, and which is most suitable for producing a 
liquid crystal display device having low color irregularity in 
liquid crystal display since the sealant does not cause liquid 
crystal contamination, and relates to a sealant for a One prop Fill process, in which in production of 
liquid crystal display device by a One prop Fill process, even a portion where light may be not directly irradiated can be adequately cured, a liquid 
crystal is not deteriorated by 
ultraviolet light to be irradiated in curing the sealant, and high display quality and high reliability of the 
liquid crystal display device can be realized, a vertically conducting material, and a 
liquid crystal display device obtained by using these. The present invention is directed to a sealant for a One prop Fill process, which contains a (
meth)
acrylate compound having a structure represented by the following general formula (1), 10 to 70% by weight of a curable resin component contained in the sealant being the (
meth)
acrylate compound. In the general formula (1), R1 represents a 
hydrogen atom or a 
methyl group, X represents one species selected from the group expressed by the following 
chemical formula (2), Y represents one species selected from the group expressed by the following 
chemical formula (3), A represents a ring opening structure of cyclic 
lactone, and n has a value of zero or one.