How to Use Thinset as Grout

Step 1

Pour the thinset into a plastic grout bag until the bag is half full. A 1-gallon zip lock baggie works well for a grout bag.

Step 2

Cut the very tip of the bag’s corner off with scissors. If you have a trout bag, the corner will have markings to show you where to cut. If you are grouting a standard ¼-inch grout line, cut approximately 1/8-inch off the tip of the bag.

Step 3

Squeeze the thinset out of the corner of the bag and into the grout joint. Fill joints until the bag is empty.

Step 4

Wipe excess thinset off the tie with a wet sponge.

Step 5

Radius the grout with the tip of a dowel rod or by running the tip of your finger over the surface of the grout. Again, remove any excess thinset from the surface of the tile with a wet sponge.