Skimmer Sealant

[TCates]

What's the best sealant to put on a skimmer?

[Keith N]

I usually use what comes with the skimmer or we use Aquascapes silicon.

[Stonehenge]

If the water feature will support life (fish, etc), a fish-safe silicone sealant. If it's a pondless waterfall, then it doesn't need to be fish safe.

[4seasons]

most come with a rubber gasket. If not ,what the others said...