When installing a new seal between the glass and the headlight housing, should I apply some sort of sealing material in between? Or should I just go ahead and install the new seal and new lens without applying anything? This is for the square Euros if that matters. Thanks.

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http://farm8.staticflickr.com/7271/7...144c3fc1dc.jpg

I redid the seal on my knock offs and used some black RTV.

Use some silicone grease- that's it.