Swapping on an Airgap intake

I use permatex no. 1 or 2. The brown gooey stuff, on coolant fittings. Works great, or the white permatex thread sealant. I avoid silicone unless I have to. Intake corners/end rail area and oil pan corners, thermostat, intake water passages, thats about all I use it on. But thats just my opinion. I hate cleaning that crap off bolts when I have to take it apart again.