Hi Monah
Please visit our web site,
Inland RV Center - The Nations Leading Expert in Airstream Innovations
Go to parts and then to part # 34727.
That was designed to exactly remedy the lift arm seal problem. They are installed with 2 screws, and it's done.
I might suggest that you check your exterior gaskets on all your windows and entrance door. Also, check the rock guard for cracks. Depending on where it may be cracked, it could fly off when on the highway.
Also, please visit our article section. Read the article about the "Dura-torque axle". That will teach you how to check yours out in 30 seconds, so that you can make sure your coach is safe.
If you have any other questions or concerns, please call me at 800-8777311.
Regards.
Andy