Easy to Use
Very easy to use.  Drill the holes in the grout as large as you can without hitting the tile edges.  I drilled holes about an inch and a half apart so I could get the liquid completely under the tiles.  It worked great.  It has been several months and the tiles are solid.  The material should be almost liquid when it comes out.  It should not take a lot of force to come out of the caulking gun. After cutting the tip, remember to puncture the inner seal or you will have a mess on the back of the tube.
Rating: 5 stars