I thought to give you are part number but that failed as I find no 2004 Voyager listed???
Maybe something missing? Sometimes the RV is on a different year chassis?
Parts catalog here: https://catalog3d.winnebagoind.com/menu/Parts.htm
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Richard
Why no RV year, make and floorplan on MY signature as we suggest for others?
I currently DO NOT have one!
You can purchase it from Winnebago Parts, # 039623-01-000. Your current seal is crushed in the area where it is not crimped for the mounting area, so the new one looks more like a triangle with an air pocket in it in that area.