I tried Permatex High Temp Red Sillycone. First attempt lived ~10 miles before turning to melting Jello. Second attempt, with more care and prolonged cure time. Did even fewer Miles . 3rd try using extreme care lived mebe 15 miles before turning into runny red jelly. 3 attempts were more than Enough for me. Small factoid: Silly-cone cannot tolerate Fuel and oils, dissolving it effectively. Clearly Too much of which spews out of my ex ports.
Consequently have been using Zero sealants for Years .. a quick wipe up with a rag after rides suffices.. ably.