NOT 100%.

Some time ago the setts were assaulted by cowboys. They 1/2 did a good job. Power washed them all, took pay and didn't come back "tomorrow" to finish. having a photo of their van I publicised them online, they eventually returned and left me the sand thay hadn't installed.
:¬)
Meantime I'd bought some of the stuff which sets when wet. Mostly it succeeded; but, as you can see, not entirely successful.