Grouts must undergo little shrinkage, must adhere permanently to the tile edges, and must possess a certain flexibility so that requirements for esthetics and functionality aspects may always be met. WACKER dispersible powders from the VINNAPAS^® series improve adhesion to tile edges, increase deformability and substantially increase abrasion resistance. Furthermore, grouts modified with VINNAPAS^® are water-repellent. As a result, they reduce water absorption and reliably protect against soiling, discoloration and efflorescence.