Sealants for water feature

[Bombina Bob]

IMO the best sealant for frogs would be 100% mold free silicon. It comes in a bottle which you put in a caulk gun. Silicon can be messy, its best to buy a pack of latex gloves (or if your allergic to latex) plastic gloves. The Silicon should dry within a day or two in a heavily ventilated area. If you smell vinegar, its not ready. Good luck with your water feature!

[LittleFrog]

Problem with silicone is that even clear silicone gets slightly opaque with time, not something I want happening on my rock features