Sonicism 60 Pack Pyramid Double Sided Tape Squares for Acoustic Foam Sheets, Heavy Duty Wall Mounting Tape Squares for Polyester Foam Acoustic Panels, 1.4-in Squares, Transparent

Works great as advertised.

cheap, and woks just as well as the more expensive ones

Both to secure acoustic sound proof pads in my son's bedroom. Peel and stick. Make sure the adhesive sticks to the back of the foam before installation. The pads (12x12x2) have been up for 3 weeks. Haven't had one fall yet. Recommended