BOSS 826 Acoustical Sound Sealant - 29 oz Tube White

I was skeptical at first, but this acoustic caulk did everything and more. I stay in a poorly soundproofed apartment. This product does just as great if not better than expensive acoustic treatments by lowering noise transmission traveling through the vibrations between walls. I kid not, the bass coming from my neighbors walls went down to a level that I couldn’t imagine. The noise from the loud outdoor AC lowered a bit once I applied some around the windows. I’m very happy with this purchase. It even helped lower the amount of impact noise from footsteps I was also hearing along shared walls. Well worth the spend.