The embodiment of the invention provides sealant, a liquid crystal display panel and a liquid crystal display device and aims to avoid defects occurring in a static test, and the phenomena of greening and light leakage at the edge of the liquid crystal display device can be avoided. The liquid crystal display panel comprises array substrates, opposite substrates opposite to the array substrates, black matrixes arranged on the sides, facing the arraying substrates, of the opposite substrates and sealant, wherein the sealant comprises matrix materials and insulating materials mixed in the matrix materials; the sealant is arranged between each array substrate and the corresponding opposite substrate and arranged on the outer side of each black matrix, and sealing cavities are formed.