Backer Rod & Vulkem

[medfordman]

In between the brick that lines the pool and the cement sidewalk/patio, there is a gap to allow for expansion. Apparently whatever was in there before has eroded. I was told to fill the hole with Backer rod, and then put something on top of that called Vulkem.

Anyone out there know what I'm talking about and could offer me some advice and/or walkthrough on how to complete this without making an unsighly mess?

Thanks in advance,

MM