Barwalt® Hollow Leave-In Spacer (T Style). The first industry approved Hollow Spacer to be left in!
Years of research led to a spacer that would react like a rubber spacer but be hollow, so it will stay in the joint and be grouted over. Now the installer can grout a day earlier and not have to comeback to remove the spacers before grouting. The Hollow Spacers will adjust on 10% and not compress further and these spacers are longer to handle the radius corner tiles.