The invention relates to sealant, a display panel and their production method, relates to the technical field of display equipment, and mainly solves the technical problem that frame sealant for liquid crystal display panels has poor watertightness so that display abnormality caused by entering of vapor occurs. According to the technical scheme mainly used herein, the production method of the display panel comprises: placing the sealant between a first base plate and a second base plate; irradiating the sealant for pre-curing; cutting the sealant subjected to irradiating for pre-curing so thatshells of at least part of capsules are cut open; irradiating the cut sealant for curing again, wherein shadowless glue is less than the frame sealant in moisture permeability, and the shadowless glue flowing out can be irradiated again to form a moisture-proof film. Compared with the prior art, the moisture-proof film can provide improved moisture resistance for display panels.