How quickly do add the sand? As you are going or at the end?
I am planning on useing the silkaflex, they are cutting the pavers about 1/4"-3/8" away from the coping. I have natural stone so it a bit wavey. The coping is 2 3/8" about the same as the pavers, i am planning on pushing foam backer rod in the gap and using the silkaflex. I know its self leveling but does it shrink? In other words, when you fill the joint to the top is going to remain the height and not shrink down into the joint?
I think i will put some oversized foam in the joint when they do the polymeric sand so none gets into this joint.