Was told that rust has developed around rim causing air to leak from tires. Have cast aluminum wheels
Leaking air in tires on 2005 Buick Rendezvous
This is a fairly common issue with corrosion developing between the rim and the tire bead causing a small leak. There are some sealers available that can help this issue but unfortunately there is little you can do to stop the leaks.
Can you give me the name(s) of the sealers? Thanks, Randy