High peeling strength polysulfide sealant and sealing method

The invention belongs to the technical field of polymer sealants, and relates to a high peeling strength polysulfide sealant and a method for sealing by using the sealant. The sealant is composed of a component A-based paste and a component B sulfur paste, wherein the component A is composed of a filler, a plasticizer, a crylic acid-terminated modified polysulfide rubber, a coupling agent and a liquid polysulfide rubber; and the component B is composed of manganese dioxide, dibutyl phthalate and an accelerator D. The invention provides the high peeling strength polysulfide sealant and a sealing method thereof. The adhesive property of the sealant is increased without increasing the viscosity of the sealant.