Can repair the porous of fe, al, mg, zn, cu metal casting components and powder metal components and ceramic components and wood components.\n yj-85c impregnant sealant has good quality. yj-85c impregnant sealant is started from 1992. now it is used in global, just like gm, guangzhou auto, yiqi, ford, dongfeng, matsuta, toyota, nissan, komatsu etc. \nthe points:\n1. unique points:\na. the best washablity: (only 2 companies in the world.)\nb. recycling industrial waste water: