Assess and Prepare the Large Gap

So, I'm going to use Big Stretch right here to fill a really big gap behind this benchtop in this garage right here. And the gap is so big, if you try to put the caulking down there, it's just going to just fall right through or it's just going to be like endless filling it with caulking. So, I'm going to use backer rod. If you've never seen this, this is backer rod. You're going to stuff this down there. It's going to give some backing for the caulking to actually sit