Any suggestions for petrol proof sealant?

[GDCobra]

Hi all.

I've just had a new aluminium fuel tank made and I've included a couple of inspection hatches on the top which bolt on. I'm sealing the cover against the flange with gaskets but am also thinking of putting some sealant on the bolt threads (which go into the tank) to prevent any fumes escaping (I really want to have a boot which does not stink of fuel). Can anyone suggest a sealant which will not be disolved by petrol.

Thanks in advance.

[TINKA]

I used something like this on my fuel tank from the aviation industry. This was over 10 years ago now and I have had the lid on and off quite a few times without any problems and not a trace of petrol smell in my boot. I didn't put anything on the bolt threads though.

[Paul B]

Hylomar Universal Blue is supposed to be fuel resistant as well as being non-setting, for when you eventually want to remove it !

[Peaches94]

Another vote for Hylomar

[Bernie]

Adams Aviation are good at that sort of stuff -
https://www.adamsaviation.com/oils-p...sive?qfs=1&p=6

B

[GDCobra]

Thanks guys.
I'm not too enthused by Hylomar mainly because it doesn't set, bit worried about it getting into the fuel. Bear in mind I'm sealing the panels with gaskets (viton) the sealant is just for the threads.

Cheers Bernie, I was thinking of aviation sealant and was going to ask a mate of mine from the old days (when I used to be an engineer) about it as he still works in the industry.

[aaronjb]

Loctite 577 Thread Sealant should do you - resistant to fuel (including ethanol), oil, etc and available everywhere*

*well, lots of places, but probably not Halfords.

[GDCobra]

Loctite 577 Thread Sealant should do you - resistant to fuel (including ethanol), oil, etc and available everywhere*

*well, lots of places, but probably not Halfords.

Cheers Aaron, sounds like a good solution, will help keep bolts from loosening too.

[scepticwoody]

Be a little bit careful about Loctite.
If you need to undo the bolts again check whether or not the Loctite is the setting type.
I hate the stuff (based on a lifetime of spannering).
A good sealant would seem the best solution

sceptic

[StewbieC]

I've used this stuff for years and it has never let me down.
https://www.frost.co.uk/brake-pipe-seal-75ml.html
It doesn't go solid like loctite.
If you search brake pipe sealant in Google there is a Sealey alternative that Amazon sell that looks a little cheaper with free shipping. Not used that variant as the one from Frosts has lasted me some 15 years and still works perfectly out of the applicator. Excellent for fuel, air pipe and brake pipes as a thread sealer and thread retainer.