Step 3

Mix the grout until it’s powder-free

Mix the grout with a margin trowel until all the powder is dissolved. Roll the bucket frequently while mixing. Scrape the bottom to make sure all the grout is mixed. Pour some grout out of the bag into a mixing bucket. Pour water in a little at a time and start mixing by hand using a margin trowel. Tip the bucket toward you and roll it in a “cement mixer” style as you mix.

When you’re getting close, dribble in water from a sponge. It only takes a little too much to create soup. And don’t mix grout with a drill and mixing paddle. This method churns the grout and introduces air into the mix. That weakens the cured strength and causes a type of discoloration called “shading.” Besides, we’re trying to mix grout here, not make soufflé.

Family Handyman

Step 4

Let the grout “slake”

When your grout has reached peanut butter status, stop! Go and make a sandwich, take out the trash, whatever. Let the grout slake (rest) for about 10 minutes. This allows the chemicals in the grout to work their magic. Skipping this step may result in weaker, crack-prone joints. After slaking, the grout will feel a bit stiffer, but don’t add more water. Remix the grout by hand again to loosen it up.