Single-component grout based on special cements with high resistance to abrasion and compression, such as PTL 52,5R, quartz aggregates and synthetic additives that make the mixture extremely workable, smooth and easy to clean. Suitable for sealing the joints of any kind of ceramic material, vitreous mosaic, glass bricks, marble and natural stone from 4 to 18 mm in width, without creating cracks or slits.