Expansion & Movement Joint Profiles - Style 1 (EJ1) are used to accommodate up to 5/64" (2mm) of movement within a large field of tile when installing using the thin bed method. For abutting tiles, they also provide edge protection against chipping and cracking of the unfinished tile edge. Available in Aluminum and Stainless Steel and a variety of EPDM infill colors. Suitable for residential and commercial projects, they can be used indoors and outdoors as an alternative to caulking.