This stuff is amazing. It’s for commercial use so very hard to get, however Amazon began carrying it which is amazing for us home-improvers. Our countertop installer told me about how it can’t be purchased at any hardware store. Only found it on Amazon and it works the best by far. Fill’s any crack or crevice that may appear with ease. Been using for almost 3 years now. I honestly have nothing negative to say about this, I highly recommend.