Thetford Seal Lubricant has been specially developed for the periodical care, protection and lubrication of seals of Thetford Porta-Potti chemical toilets and is absolutely safe to use. Regular use on the blade seal of the toilet, for example, ensures that it always stays pliable and will last longer.
 
From the manufacturers of the Porta Potti
Also suitable for the protection and lubrication of locks, hinges, awning rails, bicycles, etc.
200ml Spray