Covering silicon in tank

[CoralWealth]

So when I made my aquascape, I stupidly used silicon in a couple spots and I want to cover it up with something.

I can’t take the rock out of water. I welcome any suggestions.

 

[ca1ore]

Mix up a good sized blob of epoxy putty, roll it out flat and use it to cover the silicone areas. Coraline will then grow on it.