Correct Sealant for Windows, Marker Lights, Rain Gutter, ?

I'm not sure this is the best stuff, but it's what ORV uses. It has a "a bit of self leveling" attribute to it, but not in a runny way. So when you apply it to clearnace lights or hatches it will just lay down a little to make a smooth application. When you need to remove it, it comes up nicely with a heat gun and a putty knife with rounded edges. Geocel 2300 Clear Tripolymer Construction & Pro Roofing