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[Barry-Sue]

Our toilet blade was starting to stick again even though we had lubricated it this winter.  While shopping we found a sale on the Thetford brand lubricant as shown here http://www.thetford.com/Home/Products/ChemicalsCleanersHome/ToiletSealConditioner/tabid/181/Default.aspx

We called Thetford and asked them how long we should let this lubricant sit on the blade.  They said the longer the better.  We poured enough in to cover the blade and let it sit for a couple of weeks.  After using the toilet this weekend we could really notice the difference.  The blade closes completely and at a very fast rate.  The foot pedal is nice and smooth and I do not feel that we are using too much water to clean the bowl.

[lghjr]

Some silicone sprays are formulated with solvents that will attack plastics. The solvents usually evaporate fairly quickly, but me, I'd stick with same brand.

[TomHanlon]

Sue,
I went by the RV dealer I used to work at yesterday. They were already sold out of the stuff. I asked the owner about it and he told me he had never used it but that Thetford makes good products and I might want to try it. My only concern is, if I understand you,  you pour it in and let it sit. I seems like it would work on the top of the top seal, but I don't understand how it works on the bottom or inside the groove of the seal. When I have sprayed in the past I always open the valve and sprayed all over the seal. I do appreciate your input and I bet you a dollar I will end up trying it after my next stop at Camping World.