METHOD FOR SEALING POROUS OBJECT

摘要

PROBLEM TO BE SOLVED: To provide an economically advantageous method for sealing a porous object such as a casting by which the generation of foam is suppressed without damaging the stability of an impregnating solution, and also, the reduction of an impregnating cycle is possible. SOLUTION: In the method of repeatedly performing the process of feeding an impregnating solution 3 containing methacrylate as a component into an impregnating tank 2 from a solution storing tank 1 of the impregnating solution 3, impregnating a porous object 5 with the impregnating solution 3 in the impregnating tank 2 and thereafter returning the impregnating solution 3 to the solution storing tank 1, the impregnating solution 3 after the impregnation is stayed in piping 4 connecting the solution storing tank 1 and the impregnating tank 2.