Using tile adhesive instead of grout is not recommended and can lead to various issues with your tiled surface. Grout and tile adhesive serve different purposes and have distinct properties, so they should not be used interchangeably. Here's what could happen if you use tile adhesive instead of grout:
Lack of Proper Bonding: Tile adhesive is designed to bond tiles to the surface, while grout is used to fill the gaps between tiles. If you use tile adhesive in the gaps between tiles, it may not bond properly with the tiles' edges, leading to weak adhesion and potential tile failure.
Inadequate Flexibility: Tile adhesive does not have the same flexibility as grout, which can accommodate slight movements or expansions of the tiles due to temperature changes or settling of the building. This lack of flexibility can cause tiles to crack or pop out over time.
Unsightly Appearance: Tile adhesive is not formulated to create a smooth, even, and attractive finish between tiles. It may dry unevenly, leaving gaps and inconsistencies in the surface, which can be unattractive and difficult to clean.
Difficult to Clean: Unlike grout, tile adhesive is not designed to be water-resistant or stain-resistant. Using tile adhesive instead of grout can make it challenging to clean and maintain the tiled surface, as debris and liquids may get trapped in the gaps between tiles.
Poor Water Resistance: Grout is specially formulated to prevent water from seeping into the gaps between tiles, protecting the underlying structure from water damage. Tile adhesive does not offer the same level of water resistance, potentially leading to moisture-related issues over time.
Longer Drying Time: Grout is designed to set and dry relatively quickly, making the installation process more efficient. Tile adhesive typically takes longer to dry, which can extend the time needed to complete the tiling project.
In summary, using tile adhesive instead of grout is not a suitable substitution and can lead to structural, aesthetic, and maintenance problems with your tiled surface. Always follow the manufacturer's recommendations and use the appropriate materials for each step of the tiling process to ensure a successful and long-lasting tile installation.