High-performance sealant for communication engineering construction

The invention discloses a high-performance sealant for communication engineering construction and belongs to the technical field of preparation of sealants. The high-performance sealant comprises the following components in parts by mass: 62-75 parts of isocyanate, 23-30 parts of polytetrahydrofuran glycol, 1-2 parts of 2,5-di-tert-butylhydroquinone, 5-7 parts of polyisobutene, 3-4 parts of bis(2-dimethylaminoethyl) ether, 3-4 parts of mineral oil, 2-10 parts of polysiloxane, 0.8-2.5 parts of calcium carbonate, 0.8-2.5 parts of mica powder and 0.5-1.3 parts of ceramic powder. The high-performance sealant provided by the invention has the advantages of excellent weather fastness and insulating property and short curing time.