Silicone itself is pretty benign. If you're worried about the carrier, spray the stuff on just after launching and let it flash off while you have fun on the water.
jky
Should add that teflon is even less reactive than silicone.
One more thing to be aware of - silicone or PTFE in the fabric (it will penetrate to some degree) will preclude any type of glue repairs in the future. Glue will not stick to anything exposed to silicone or PTFE without scraping/sanding the affected material off.