Abstract: Variation rules of the tensile property and adhesion and peeling resistance of polysulfide sealant were studied in salt spray (25 ℃, 50 g·L^-1 NaCl solution, 1 000 h), heat and humidity (60 ℃, relative humidity of 95%, 90 d), high temperature (70 ℃, 365 d), low temperature (-45℃, 7 d) and outdoor exposure (1 000 h) environments, respectively. The influence of environmental factors on its weatherability was analyzed. The results show that in high temperature, low temperature, heat and humidity and salt spray environments, the tensile strength of the polysulfide sealant decreased with increasing test time, and the break elongation increased; the peel strength changed little, indicating that the adhesion and peeling resistance of the polysulfide sealant was not affected by the above environments and its low temperature resistance was excellent. In outdoor exposure environment, the tensile strength and the break elongation of the polysulfide sealant both significantly decreased with increasing test time, while the peel strength changed little, indicating that ultraviolet irradiation and thermal oxygen aging had an obvious effect on the tensile properties, but had little effect on the adhesion and peeling resistance.