Grout is usually a mixture of cement, sand, and water or chemicals that are used to fill gaps. They are used in repairing concrete cracks, filling seams and gaps in tiles, gaps for sealing and waterproofing, and for soil stabilization. It is also used to give additional strength to the foundations of load-bearing structures. The grating is basically a process of injecting a pumpable material into a structure to change its physical properties.