Replacement vent gasket

[Steveg]

Hi my 2006 Luna frystar touring caravan needs a replacement vent gasket on the front of the van the old gasket was missing when I bought the caravan I have no idea what type of gasket to replace it with if anyone can help i would be grateful I've included a photo of the guley where the the gasket should go

 

[Jcloughie]

I may be very wrong. But I suspect that that may be a gutter and supposed to be empty. The roof vents do not full seal by design to allow for some trickle ventilation.

John

 

[toad a caravan]

One way to find if it is missing is to Google the vent and see what spare parts are available you also may find a data sheet available