Has anyone used the Flurosilicone lined hoses for fuel filler neck pipe ?

They are sold as fuel and oil resistant but after some questions / info I recived from a supplier ‘Quote’ :

“If there is petrol passing through the hose then I have to say that I wouldn't use any silicone hose even with a flurosilicone liner in it. Although it probable would do the job I won't guarantee it”

Just wondered if anyone had tried them and what, if any bad / negative effects you had had.

Cheers for any replies.

WD