Wrinkley Posted May 31, 2014 Report Share Posted May 31, 2014 Just received my new Thetford Cassette lip seal to find that the fitting instructions says 'IMPORTANT: before placing the new lip seal make sure that it has been treated with Thetford seal lubricant' I do not have any Thetford lubricant! Anybody suggest an alternative please? Link to comment Share on other sites More sharing options...
frangar Posted May 31, 2014 Report Share Posted May 31, 2014 Any silicone type spray will work....at a push even some furniture polish would do. Cheers Gareth Link to comment Share on other sites More sharing options...
Guest Posted May 31, 2014 Report Share Posted May 31, 2014 Seconded. Silicone spray. Halfords and suchlike sell it. Our Poundland had some in for a while. Link to comment Share on other sites More sharing options...
Hairy Animal Posted June 1, 2014 Report Share Posted June 1, 2014 I used Vaseline when I serviced the seal on our Porta-Pottis and it seemed to be fine. Some things can attack the rubber so it's probably best to use something that someone recommends from personal experience. Link to comment Share on other sites More sharing options...
David Schweizer Posted June 1, 2014 Report Share Posted June 1, 2014 I have to confess, not being aware of this requirement, I have never used any lubricant after replacing the lip seal with no apparent problems (so far!), Apart from that, once it is pressed into service, it gets lubricated by water which seems to work quite well. Link to comment Share on other sites More sharing options...
pearley Posted June 2, 2014 Report Share Posted June 2, 2014 We originally used Vaseline on the seals of our Vacuflush cassettes. Made them swell and break. Now use silicone grease. Link to comment Share on other sites More sharing options...
Wrinkley Posted June 2, 2014 Author Report Share Posted June 2, 2014 Thanks to all for your suggestions. I had to look furniture polish to see what that was! i have avoided petroleum jelly (Vaseline) as it may damage the seal and have used hand cream 'cos its greasy and ok for skin so fingers crossed its ok for rubber seals. Now the seal in my other cassette has started leaking. What's with it with these things. OK 2 years constant use turn about but the seals have not lasted. Worst of all they still look good. I am tempted to whack them down with some silicone sealant, that should stop it, may be. If its knackered I can't make it any worse, and at a £10 a time..... Link to comment Share on other sites More sharing options...
Guest Posted June 2, 2014 Report Share Posted June 2, 2014 I wonder if the blue stuff knackers the seals? Link to comment Share on other sites More sharing options...
Wrinkley Posted June 4, 2014 Author Report Share Posted June 4, 2014 Because its raining I found this http://www.caravanclub.co.uk/media/5281308/technical.pdf Its a document showing how to service/replace seals in the cassette, the important part for me is Thetford strongly urges users never to lubricate the lip seal with oil, grease, or Vaseline. Either smear on olive oil or buy a can of Thetford Maintenance Spray for Toilet Seals So its off with the hand cream and on with the Olive oil Link to comment Share on other sites More sharing options...
bizzard Posted June 4, 2014 Report Share Posted June 4, 2014 Brake fluid should be okay too. Link to comment Share on other sites More sharing options...
Wrinkley Posted June 4, 2014 Author Report Share Posted June 4, 2014 Will this improve the skids? Link to comment Share on other sites More sharing options...
bizzard Posted June 4, 2014 Report Share Posted June 4, 2014 Will this improve the skids? No but it should stop the runs. Link to comment Share on other sites More sharing options...
Wrinkley Posted June 4, 2014 Author Report Share Posted June 4, 2014 I've had trouble with seepage. Should have asked you first! If the olive oil does not do the trick DOT 3 for me. Link to comment Share on other sites More sharing options...
bizzard Posted June 4, 2014 Report Share Posted June 4, 2014 I've had trouble with seepage. Should have asked you first! If the olive oil does not do the trick DOT 3 for me. Lovely word is seepage, DOT4 for higher performance. Or if thrifty Holts universal. Link to comment Share on other sites More sharing options...
carlt Posted June 4, 2014 Report Share Posted June 4, 2014 My Porta potti was made in France...Do I need to use LHM fluid? Link to comment Share on other sites More sharing options...
bizzard Posted June 4, 2014 Report Share Posted June 4, 2014 My Porta potti was made in France...Do I need to use LHM fluid? Why not, older Sh--roens used it. Link to comment Share on other sites More sharing options...
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