<VV> Re: RTV vs oil and gasoline

[djtcz@comcast.net]

> I discovered decades ago that RTV isn't worth a tinkers damn for sealing 
> against oil or gasoline or most any other petroleum based liquid. Water 
> and air etc it's fine, nothing better. But it's worse than nothing for 
> gas or oil. 
> 
The Blue and black RTV silicones sold as gasket sealer hold up to oil well, but like you say, fail miserably around gasoline.  The gasket product instructions mention what's acceptable.  I just looked at a tube of GE Silicone II tub sealer and it says not for use below the waterline. No mention of use as gasket sealer.