Silicone coupler leaking

So I replaced all my rubber intake components with silicone after I found a leak. The Perrin Turbo intake hose works great but I ordered a Mishimoto IC to RB coupler. It was a bit shorter than the stock coupler but has some bite on the TB and IC. It doesnt pop off at all but it does leak a little bit. I am using nice t clamps on it but wondering if there is some sort of silicone sealant I can use as well? It doesnt seem to leak all the time just sometimes under lower RPMs maybe when the motor is shaking a bit more. I did find some oil in it from before I installed my catch cans wondering if that could be contributing to it. When i reseated it recently it was fine for a few days before noticing the A/F off and my tuner let me know I have a leak post turbo again. It is really on there is hard to believe it is leaking. I wonder if I maybe over tightened the t clamp or the oil could be causing it. Thanks guys any feed back is appreciated.