TB1121 is a non-drying liquid gasket on the basis of denatured ester resin developed and patented by ThreeBond from the viewpoints of user safety and easy detachment of joined surfaces. TB1121 is applied on one of the fitting surfaces and can be assembled immediately after application. After assembly of the parts it is completely adapted to the surface structure of the fitting faces. All small indentations, such as tool marks and scratches, are filled in as well as any unevenness of the fitting surface. It exhibits exceptional sealing effect without becoming thin due to solvent evaporation. Further, joined surfaces are easy to separate, resulting in enhanced working efficiency during disassembly.