Any advice on tire dry rot?

[Cappy]

I just got some bad news the tires on ma ole jeep are dry rotted. I had a slow leak and I figured the tire had come unstuck from the rim. I had changed the valve and it still slowly went flat in a week. I asked the tire guy and he said the side walls were all dry rotted. he put a tube in ti to get it to hold up but said they prolly all like that and just a matter of time.

Just wondering what if anything can prevent or help this. I know the boat tires are dry rotted ya can see cracks in them but not the jeeps they look ok on the out side.