The EZ 40 is designed to cap the vertical ends of your windows and doors in a caulk-free fashion. It is also used when butting up against other building materials used outside of the EasyTrim® System. The features of the EZ 40 are industry-leading 3/4 in. tabs to protect your fiber cement as well as our patented EZ.Bump® for full water management, and caulk-free installation.