There were no clips for the outer seal. The FAM (Section 14, sheet 14.00) shows sealing compound on the whole length of the rubber seal. Not sure what type of sealing compound was used, but I didn't see any evidence of sealant when I pulled the old rubber out. Must have disintegrated over the past ~70 years. I imagine something that is medium bodied (not too runny, but not too thick) would be OK to use.
