GE Silicone Problems..

[spit.fire]

Originally Posted by Ulmo

Interesting, SCS1200 label says specifically "not for use below water."

It's a liability thing

[rynoe]

I have been using momentive RTV 108 with good results. Strangely it is sold at most electronic supply stores.

[reefwithareefer]

SCS 1200 for me.

[Bblinks]

I use this, never had a problem. I have established that in this hobby do it right the first time, don't try to penny pinch and you won't have tank crashes.