Ecotech Marine Cg
I like Tunze coral gum, doesn't reek like other epoxies, sets super fast and is actually still kinda pliable when cured, I used to use TLF brand but its seemed it had a hard time really adhering to a wet rock, pretty much always had to use super glue gel too.
The Tunze epoxy is worth the price IMO.
I use the TLF pink colored epoxy & I agree with this. Unless there is a hole to mush it into, it wants to detach - especially a heavy piece working against gravity. But it's fine if used in conjunction with super glue gel. It's expensive for what it is. The big advantage for me is the color which looks natural to me in my tank.
The Tunze stuff sounds interesting. Does it make your skimmer go crazy for a few days after using it like the other brands?