... a big factory in Beijing!The sealant is double-components cream,component A is white polysulfide sealant ... 10:1. The polysulfide sealant used for waterproof joint sealing or caulking insubway,tunnel,driveway,highway,bridge, ... pure, well-distributed.3.Inject the mixer into joint by sealant gun, use trowel make surface ... .Use any waterproof cloth(fabric) keep the joint surface from rain or water in 24 hours ...