Anyone know if you apply contact cement or some glue when applying new paper gasket ?

 

 

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I think there must be some kind of thin sealant, mine looked the same as yours and you really don't want moisture getting in there. Did you manage to save your paper gaskets?

Although they were stuck to the metal, I didn't really get the feeling that the paper gaskets in my horns had any kind of glue or sealant used.  I agree with Grannyknot that you don't want water getting inside.  I debated about using sealant.  I even thought about using thin-sheet neoprene foam rather than paper when I cut new gaskets. However, I was worried that a thicker or softer material might mute the horn, so I just used thin gasket paper (dry).  After all was said and done, I ended up with the characteristic Z horn sound that I wanted, but I don't think it's loud enough to get the job done in modern traffic so I'm going to back them up with a pair of FIAMM 'Freeway Blasters'.

I used a light coat of spray adhesive on the edges of the paper gasket and all has been fine.