Skylight has small crack

Okay, I see thanks for the clarification.

If you have a crack that has formed , the chances it continues is great , IF you take a small drill bit and drill a hole at either end of the crack ( kind of like dotting the I ) once the crack hits that section it should NOT spread any further . .

The last two posts talk about drilling the crack. I hate being dumb but could you elaborate on what drilling the crack means and how to do it etc.

X2 on the stop drilling. 1/16 inch should do it just BEYOND the end of the crack.

I used Superglue on mine

I stop drilled the crack and covered it with a small strip of Eternabond.
No problems.

I had the same small crack in sky light above shower. I found mine because it rained. I got water under shower. I cleaned with mineral spirits and used Dicor self leveling caulk on it. Sealed the leak. No more water and can't even notice looking up from inside.