The gap seal between the planes usually uses a solid gasket. Due to the roughness of the plane processing and the influence of the tool marks, it is uneven in the microscopic view. It is impossible for the solid liner to 100% fit the processing surface. The solid liner is aging due to temperature, medium, and mechanical force, causing looseness and leakage. Huayu series of plane sealants are single-component glues with good medium resistance, no shrinkage during curing, 100% full gaps, flexibility and shock resistance, and no leakage or leakage after long-term use.