And if you don’t want to mess with the goop, YYJ silicone is a great way to go.
And as far as play goes, the yoyos mentioned above uses it. Therefore, it should play nicely. I don’t know how long it will last. But if durability is what you are looking for, I have heard that AnY O-pads last as close to eternety one could possibly get. But somepeople claim that binds tend to slip on those.
Addment: These is MUCH easier than filling a groove with silicone. And also less messy.