I used this stuff. You just have to make sure the mounting surface is very clean and little to no texture. https://www.amazon.com/Mounting-Squares-Acoustic-Panels-Adhesive/dp/B0B3J6994L/ref=mp_s_a_1_1?crid=2VMX3D9ZTSUTF&keywords=birllaid+100PCS+Mounting+Squares+for+Acoustic+Foam+Panels%2CDouble+Sided+Tape+Squares+for+Sound+Foam+Panels%2CFoam+Adhesive+Squares+Sticky+Pads%2C+1+Inch&qid=1686247704&sprefix=birllaid+100pcs+mounting+squares+for+acoustic+foam+panels%2Cdouble+sided+tape+squares+for+sound+foam+panels%2Cfoam+adhesive+squares+sticky+pads%2C+1+inch%2Caps%2C181&sr=8-1