Location: Kissimmee, FL, United States I left a 1/8' gap between the Back Splash and the Countertop to allow the "Grout Caulk" to penetrate and create the proper barrier for water and liquid intrusion and I wanted it to be protective but not to be to much over the glass but enough to do its Job. Also, since the "Gaps", even though they were not that big there was some separation in some areas that needed to be addressed and a uniform line of "Grout Caulk" needed to be applied.