[DQDick]

The seal can be replaced and it helps to clean along the rim and use vegetable oil etc. to lube it. My guess would be that you have a Tetford toilet. If so that's just one of the problems that seem to be fairily common. Others are more serious. If it is a Tetford, the only real fix is to replace it with a Dometic. On the old rig I replaced seals, after the flush mechanism exploded replaced the toilet and then the seal leak started again so I replaced it with a Dometic and no problems for the next six years of full timing. Now the new rig is a year old and the toilet won't hold water again. A Dometic will be in our future again, we just have some other major mods in line in front of it.