Grout repairs are one of those pesky maintenance issues we often put off because we make it out to be more difficult than it is, or we assume we need to schedule someone to come and do it for us. In many cases, we can address these very quickly and with minimal tools involved. Here is a quick look at the general process to repair small grouted areas where our grout is crumbling or cracking. By using a siliconized grout caulk, we also increase the likelihood that the grout repair will hold against future movement in our walls or other flooring surfaces. The reason siliconized grout caulking is the preferred product for perimeters and corners, is that it has a little flexibility to fight the movement created from expansion and contraction of other building materials.
There is no need to be intimidated by this project, so go ahead and give it a try!
Links to products used (affiliate links and I do receive a small commission). For the grout caulk, ColorFast makes caulks to coordinate with most grout options but you may need to go to their main page to find the specific color you need.
Grout Saw: https://amzn.to/3KmGOsV
Caulking Gun: https://amzn.to/3X46xhu
ColorFast Grout Caulk: https://amzn.to/4bBNdMF