Swapping on an Airgap intake

I like the red silicone. It is high temp stuff. Teflon pipe sealer is not and is more intended for household plumbing fixtures. I've seen it leak in automotive applications over time. I don't understand what some folks have against silicone. It's almost like they think it's some kinda redneck duct tape engineering or sumthin. The stuff is high temp resistant and once it's cured, it's PERMANENT and will NOT leak. It works very well, as long as you use it within its element.