There's a chance on longer rides that could become a problem, but you could always look into fabricating some sort of heat shield or heat resistant paints. It might be hard to come across another quality, plug and play product at that price point.
hey can you record the sound that horn makes? the one on Amazon is pretty loud at 112 DBs but its 2 horns ..yours is one at 113DBs..Right?I bought this 2 months ago.
https://www.revzilla.com/motorcycle/denali-soundbomb-mini-horn
I ride in hot weather yesterday it was 119°F on my ride home, the temp on my bike is always high especially at stop lights, and I haven't had a problem. Plus its a nice loud air horn sound. Also it mounts up just like the stock horn so no need for mods.