Best silicon for Rimless build

[HexaReef]

In the future i want to build a rimless cube tank. Probably 60-90 gallons. I like the look of black silicon. What is the strongest silicon on the market? or is all treated equal?

 

[ronl]

Momentive RTV 103 is recommended by a lot of people. I used it to build and attach an external overflow box.
https://www.amazon.com/gp/aw/d/B004V40OF2/ref=psd_mlt_nbc_B00L51SE4M_prb?th=1&psc=1

 

[ithk21620]

Exactly what he said. RTV 103 is black and the best you can readily get.