How to Caulk a Glass Tile Backsplash

Caulk glass tiles to finish the edges.

Glass tile is similar to ceramic tile except that it is semi-transparent due to the nature of the glass. The tiles often comprise kitchen backsplashes behind sinks and stoves. Installing glass tile backsplashes is virtually identical to installing ceramic tiles. The final step of the installation process is caulking the perimeter of the backsplash to seal it. The caulk prevents water from splashing behind the glass tiles and creates a more polished final appearance.

Things You'll Need

• Silicone caulk
• Caulk gun
• Scissors
• Water
• Caulk tool (optional)

Instructions

1. Insert a tube of kitchen and bath silicone caulk into a caulk gun. Trace the plastic tip of the nozzle back 1/4 inch and snip it off with scissors at an angle.

2. Squeeze the trigger on the caulk gun four to five times until a small dab of caulk emerges from the tip of the nozzle.

3. Walk to the lower edge of the glass backsplash where it meets the sink or counter top. Place the nozzle in the crease and squeeze the trigger while pulling the nozzle along the entire length of the backsplash.

4. Lift up the nozzle and reposition it at the upper left side of the glass tile backsplash. Apply a thin bead of caulk all the way down to the bottom. Repeat the process to apply additional beads of caulk on the right side of the backsplash and on the top.

5. Dip your finger in water and then place it on top of the caulk bead. Run your finger along the bead of caulk until you feel it start to drag. Then rewet your finger and continue smoothing the caulk all the way around the perimeter.

Tips & Warnings

• You can also use a caulk finishing tool to smooth the caulk bead if you don’t want to use your finger.

• Always use silicone caulk designed for bathrooms and kitchens, since it resists mold and mildew growth.

References

• This Old House; How to Install a Glass Mosaic Tile Backsplash; Mark Powers
• You Tube: Install a Glass Tile Backsplash