Cathedral of Saint John the Divine

A crack had developed around the perimeter of the renowned Guastavino tile dome that spans the transept crossing more than 100 feet above the sanctuary floor in this third largest house of worship in the world.
In order to prevent streaking at the interior, the crack was mechanically cleaned and blown-out from above, dampened with steam, and then carefully gravity fed with VoidSpan PHLc grout. Following application, the walls and ceiling below remained streak-free and crack-free