A sealant, a liquid crystal display panel and a liquid crystal display device that can eliminate defects during electrostatic testing are provided. The phenomenon of greenish edge and light leakage can also be avoided. The liquid crystal display panel includes an array substrate and a counter substrate arranged opposite to the array substrate; a black matrix arranged on a side of the counter substrate facing the array substrate; and a sealant including a matrix material and an insulating material mixed in the matrix material. The sealant is arranged between the array substrate and the counter substrate and arranged at a periphery of the black matrix to form a sealed cavity.