Abstract: An alignment device including a base plate, locking stem, locking plate and lock maintains the front and back sides of a pair of adjacent wall mounted panels of similar thickness in lateral alignment while an adhesive applied to the panels cures for providing a smooth front surface is provided. The base plate includes a lateral surface for bracing the pair of panels in a common lateral back plane. A locking plate includes a lateral surface for bracing the pair of panels in a common lateral front plane. A lock is carried by the locking plate for engaging the locking stem locking the locking plate firmly in place with respect to the base plate for sandwiching the adjacent panels between the locking plate and base plate maintaining the back sides of the adjacent panels along the common lateral back plane and the front sides of the adjacent panels along the common lateral front plane.