Can't find a caulk color to match your grout? Here's how to custom mix your own caulk so it's a “dead-on” match
Squeeze caulk onto a mixing board, making sure you use enough to complete the entire job (it'll be hard to match if you have to add more later). Then add colored grout to the caulk and mix thoroughly with a 3-in. putty knife.
If you've checked out the sanded caulk near the grout in the tile department and can’t find one to match your tile project, just follow these two steps. First add the colored grout to a large blob of fresh caulk and mix it in (Photo 1).
Scoop a hefty portion into a zip-top freezer bag. Zip the top shut and snip off one bottom corner. Then apply the caulk/grout bead to your tub and tool the joint with a plastic spoon or wet finger. Pull the tape free before the caulk sets up.
Once you've mixed in enough grout to match your existing grout, load the grout/caulk mix into a zip-top bag and apply it (Photo 2).
Have the necessary tools for this DIY project lined up before you start—you’ll save time and frustration.
Avoid last-minute shopping trips by having all your materials ready ahead of time. Here's a list.