Under the front one it just sits on a shelf - definitely recommend using liquid butyl - caulk gun tube from NAPA. The rest of the way around both use butyl windoweld rope caulk. Stick it in the seal and push it onto the metal. I used windex to lube the glass a bit getting it into the seal. After that was completely dry, I added windoweld urethane under the lip of the seal on the glass before installing the lockstrips. Maybe not needed, but only downside is it could make it hard to re-use the seal if I ever needed to.