** I also have a tutorial on how to strip & seal saltillo tiles here :)
The tile is finished and was cleaned with vinegar to remove some of the hard water stains that the tiles had from being soaked in water to make cutting the tiles easier. Then I sealed with a Behr sealer. I have two coats in the kitchen to protect the floor from all the appliances being moved around and one coat on the rest of the house. It will probably need a total of 4 coats to get a good seal.
Some of the lime and hard water that's on the tile after the wet cutting. I just wiped with undiluted vinegar a couple of times and it vanished.
An example of the excellent detail work from Leonardo, the tile installer.
This sealer is water based so it is really easy to work with and clean up.
It's from The Home Depot. I chose high gloss wet look, but they also have a flat matte look too.
For the first coat I use a microfiber cloth on the tile and a brush on the grout lines. The rough grout lines tear up a cloth pretty fast so I found it easier with the brush. Also because the tile is so porous, the first coat uses a lot of product and didn't go on nicely when I used a mop. So the first layer of sealer I applied using a rag and a brush for grout lines, then the tile is sealed enough for the second, third and fourth coats to go on nicely using a mop.
Half the room with the sealer. This sealer darkens the tiles as if they were wet.
Top tiles have the sealer, bottom tiles are how they look without
The outer ring with sealer
The milky looking tiles are the tiles without the sealer
The look after all the tiles have been sealed.