... surface must be dense,dry,clean,no oil,dust free China supplier tile interface renovationproduct short introduction:The ... Substrate requirements:the substrate must be solid, clean free of oil or sludge and other pollution. Concrete ... be dense, dry, clean, no oil, dust and other pollution.2,when doing the mosaic ... do the construction on the old tile surface.3,Paste and sealing: for marble, granite, and ...