Sealant

[Davidbolam]

Does anyone know of a good fuel proof sealant that can be used on my tank sender?

[robo]

I have tried a few things including instant gasket type silicone and it all goes mushy after a while. 3m do this gear but its dear http://www.3mselect.co.uk/p-2870-3m-polyurethane-sealer-in-cartridge-black.aspx
Nothing else seems to work.

Bob

[monsterob]

Black hylomar / wynns black gasket maker as long as its rtv silicone you should be fine i used to use this to seal my mini engines after a rebuild and thus have sealed my tank with it doesnt appear to have gone mushy and i sealed it some months ago and have had fuel in it since

[deezee]

I sealed around my fuel sender with Blue Hylomar. I also used a sealer from Frosts to seal the bolts.

http://www.frost.co.uk/automotive-brakes-tools/brake-and-pipe-seal-75ml.html

http://www.frost.co.uk/automotive-gaskets-sealers-tools/hylomar-universal-blue-gasket-sealant.html

[robo]

This is why I wont use silicone on a tank. This is the brand of instant gasket we use, nowhere on the tube does it say its ok with fuels, water oils ect yes.
http://i1116.photobucket.com/albums/k577/mypickys/000_0107.jpg

Our fitter replaced a cork gasket that had broken on top of a fuel tank while it was in for a service.
http://i1116.photobucket.com/albums/k577/mypickys/000_0103.jpg

Less than a fortnight later its leaking and the silicone has gone all mushy

http://i1116.photobucket.com/albums/k577/mypickys/000_0106.jpg

The 3m gear stays intact.


Bob

[alga]

I've seen people use JB Weld-type epoxy sealants on gas tanks... But maybe that was something specialised.