Mastic around Spa

[bhotia]

Hello,

Im a new home owner with a pool and still figuring out all the various components we have.

While I do that, one thing I spotted a few days back was the mastic around the spa needs to be replaced. After reading several posts here I know that I require a grout removal tool, all purpose sand, sifaflex Self-Leveling Concrete Sealant and a closed cell backer rod.

Once I remove the old mastic, I see sand below it- do I need to remove and clean that our before I put in the new backer rod or should it go on top of the sand?

Appreciate any help!

Best,
Andy

Jandy Aqualink RS PDA Pool Digital Assistnat
FNS Plus Vertical Grid DE Filter

 

[ajw22]

Clean the expansion joint down to the bottom of the coping. The objective is that there is flexible material with the backer rod or mastic pressing against the coping.

 

[frazld]

Sand is not flexible use backer rod of foam expansion joint and Deck O deal.