Sump DIY question

[GothFishKeeper]

I bought the fiji cube 20 long DIY sump kit and it says i need the things in this pic of the directions, but I can’t find any “acrylic plastic silicone” online in general let alone anything that says it’s safe for aquariums. Any recommendations or ideas as to where i can find it?

 

[bradreef]

Easiest to find is GE 1 clear silicone

 

[WvAquatics]

E-6000.

 

[cloak]

woops... GL