Understanding Lime Pops and Efflorescence in Saltillo Tile

Efflorescence, is a common problem that occurs on Saltillo tiles. It is a white, powdery substance that appears on the surface of the tiles, usually after they have been exposed to moisture.

Efflorescence is caused by salts and minerals like calcium rising to the surface of the tile. When moisture penetrates the pores of the tile, it dissolves the salts that are present in the tile. As the moisture evaporates, the salts are left behind and crystallize on the surface of the tile, forming the white powdery substance that is characteristic of efflorescence.

To prevent efflorescence on Saltillo tiles, it is important to properly seal the tiles with a high-quality sealer. You can find tile sealers we recommend using here. This will help to reduce the amount of moisture that penetrates the tiles and prevent the migration of salts to the surface. It is also important to ensure that the tiles are properly installed and that the grout lines are sealed to prevent moisture from seeping in through the grout joints.

If efflorescence appears on unsealed Saltillo tiles, it can be removed using a hard-bristled brush, and then the tiles should be sealed once they are completely dry.

However, if efflorescence occurs on a sealed Saltillo tile, the sealer must be removed before attempting to remove the efflorescence with a brush or sandpaper. If the tile is sealed with an oil-based sealer, an oil-based stripper must be used to properly remove the sealer and reach the clay body surface. After the sealer is removed, the efflorescence can be removed with a brush or sandpaper. Once the efflorescence is removed, the tile should be spotless and allowed to dry completely before applying a new sealer. 

Lime pops, also known as lime popsicles or lime burst, are small protrusions that can occur on the surface of Saltillo tiles. They are small bumps that look like bubbles or blisters, and they are typically caused by the presence of lime nodules within the clay used to make the tiles.

When the clay is fired during the manufacturing process, the lime nodules heat up and expand, causing them to push against the surrounding clay. If the pressure becomes too great, the nodules can burst through the surface of the tile, leaving behind a small bump or protrusion.

It is important to use an experienced installer who knows how to properly prepare the subfloor and install the tiles. Additionally, it may be possible to remove some lime pops by gently grinding them down with a diamond-tipped tool, but this should only be done by a professional to avoid damaging the surrounding tiles.