Hydroxypropyl methylcellulose (HPMC) is a widely used chemical compound in the manufacturing of an extensive array of construction and building materials, such as tile adhesives. It is a white to off-white powder that is odorless, non-toxic, and tasteless. HPMC has high viscosity and can be readily dissolved in water, resisting enzymatic hydrolysis, and pH change. This unique combination of properties makes HPMC an ideal ingredient in tile adhesives, giving them several valuable characteristics. Tile adhesives are necessary for fixing tiles onto surfaces like floors, walls, and ceilings. The tiles can be made from a range of materials, including ceramic, porcelain, and stone. Tile adhesives are formulated to bond the tiles to the substrate firmly, ensuring that the tiles remain in place. They must also provide excellent water resistance and flexibility to accommodate the varying thermal expansion and contraction rates of different materials. Hydroxypropyl methylcellulose (HPMC) is a commonly used polymer in tile adhesive formulations, serving as a vital binder, thickener, and rheology modifier. It improves the adhesive’s consistency and strength, while also reducing water absorption, improving workability, and extending its open time. HPMC eliminates the need for water pre-soaking, which is commonly required for other types of adhesives. As a result, tile application time is reduced, and the tiles have better bonding potential. HPMC is available in a variety of grades to cater to specific requirements of tile adhesives. For instance, higher viscosity grades are used in adhesive products designed for vertical tile installations to prevent sagging or slipping patterns, while lower viscosity grades are used for more flowable and less viscous tile adhesives. Additionally, the specific modification of HPMC can enhance its performance in different applications. For example, the addition of hydrophobic groups can improve the adhesive's water resistance and help it to withstand freeze-thaw cycles. In conclusion, Hydroxypropyl Methylcellulose (HPMC) is an essential ingredient for tile adhesives, providing valuable benefits such as reducing water absorption, improving workability, and extending open time, among others. The use of HPMC in tile adhesives formulation has helped improve the strength, bonding potential, and water resistance of the product. Manufacturers can tailor the use of HPMC in their products to meet the varying requirements of different tile adhesive applications.