How do i contact ej4 customer support? Fill out the form or email us at [email protected] or call us at (800) 566-3159 and we'll get in touch with you as soon as possible. Looking for Login Support?What is ej4 elearning? Ej4 is a leading eLearning provider of training videos that employees would actually want to watch. It offers creative, short, video-based eLearning that can be viewed anytime, anywhere. Ej4 doesn't want to replace trainers and instructors.What is the difference between ceilcote ej3 and ej4? Ceilcote EJ3 is a two component, pourable polysulfide elastomer designed for use in applications requiring a chemical resistant sealant for horizontal joints. Ceilcote EJ4 is trowel grade, for use on vertical and overhead surfaces.