The 2CM non-skid profile requires a groove of 18/20 mm. width and 4 mm. depth. These grooves are common among marble workers that usually utilize carborundun. Since the carborondum process is laborious and bothersome, this profile reduces the time performed noticeably, enhances the aesthetic. It is long lasting and easily replaceable (if required).
It should be pointed out that once it is installed it protrudes 0,8 mm. only.Test Wet Dynamic Coefficient of Friction (DCOF) in order Standard ANSI A137.1-2012, Section 9.6.1 BOT-3000E (according USA).