What should be used to reseal the coping?

[eqbob]

We have natural flagstone coping. It was sealed when we built the pool. 2 years ago.

I've seen some suggestions to reseal once per year. If true, obviously I'm behind.

What product would be good to use for that?

Apologies if this is the wrong forum? Wasn't sure where this question should go.

 

[smracing]

DuPont StoneTech Pro Enhancer. Be sure to get the version for exterior use.

 

[eqbob]

Thanks!