Sealing a poly fuel cell?

[forcefed86]

I'd like to seal some ports on the sump of this cell. Because my car is a hatch I've built a steel box to place the tank in. I'd like to seal the holes of the old fittings and relocate them to the bottom of the sump. (marked with yellow grease pencil).

The surface of the tank is so oily and slick I was wondering what I could use to seal the original holes it? I'll be running e85 so it has to be compatible. I know JB weld is not ethanol compatible from past experience. I suppose I could just cap the two fittings and run another one. I'd like to reuse/relocate the fittings if possible though.

Thanks

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[dexterholland04]

Why not put the fittings back in it and just put terminating caps on them?

 

[forcefed86]

Believe I answered that...

I suppose I could just cap the two fittings and run another one. I'd like to reuse/relocate the fittings if possible though.