A must for rattling glass!
AR-1 Cover Glass Anti-Rattle Tape
This semi-clear polycarbonate high-pressure tape may be applied to the edges of the pinball playfield cover glass to reduce or eliminate the rattle induced by sub-woofers and shaking. This adhesive backed tape is ¼ inch wide and 12.5 mils thick. It comes in an 18 yard roll that will fit up to 3 machines. It hides completely out of sight in the channel. It may be double layered to tighten very loose glasses and will not come loose when sliding the glass in and out of the game.