Any GE silicone will take all the heat your exhaust system can put out. I used the old GE silicone 1 on my BSA headers at the header/head junction (they were slip in the head headers) and the silicone took the heat and lasted for years even when the header pipes would turn cherry red out 4 to 6 inches from the head.
2003 T-100 (790cc), NARK, NH Togas, 8100 rpm rev limiter, 158 main jets, 42 pilot jets (less than 1 turn out on pilot screws), stock needles--no shims. 13 A/F ratio from 1100 rpm to 4000 rpm; 12 A/F ratio from 4000 rpm to 6000 rpm; 13 A/F from 6000 rpm to 8100 rpm.:D
2007 Tiger 1050--White:D--SW-Motech crashbars, Skidmarx rear hugger/chain guard, Calsci +7 windscreen.