I'm about to remove the rust from inside a classic petrol tank and seal it, been meaning to do this for some time. I've heard some good reports about the POR15 kit, don't really mind the expense (£45) if it does a decent job but are there any alternatives you'd recommend?

TIA,

I72

  Not had much to do with any of these products   But I do know of people who used "Petseal" in the 60's & 70's   How they are managing these days with the ethanol additives is unknown   But research and "reading up" is highly recommended   Try these for a start I72   http://www.tankcareproducts.co.uk/ http://www.nortonownersclub.org/noc-chat/technical2-hea.../864906542 http://www.rust.co.uk/products/product/405062/0002-slos...tank-seal/                                                                                                                                                                                 

Thanks Emzed, I knew you'd have a positive contribution

Really must get it done as finding a replacement would be a nightmare

It's currently filled with fuel to try and offset the corrosion but not an ideal solution. I'll use the old fuel for cleaning purposes once drained

I'll post an update after I've resolved the problem but may be a while off.
                                                                                                                                                                             

Well it looks like Caswell:

http://www.caswellplating.com/restoration-aids/epoxy-gas-tank-sealer.html

OR

POR15:

http://www.frost.co.uk/por15-motorcycle-fuel-tank-repair-kit.html

............are the two best products

I did a tank on a Kwak 1000 with a  product from Frost's its a 3 part job very strong solution then flushing solution then a paint did a great job. Pet seal is no good now the new fuel is braking it down in the tanks and causing loads of issues

I72, there was an article in a recent edition of "Classic Motorcycle Mechanics" regarding this exact problem of suitable tank sealers resistant to Ethanol based fuels. Sadly, I can`t remember if it was 2 or 3 months ago. If you can find a copy it will probably help to decide which 1 to go for.

I used this to do two of my tanks:
http://www.ebay.co.uk/itm/KBS-Fuel-Gas-Tank-Sealer-Kit-does-up-to-25-gallon-tank-/141235814909?pt=Motors_Car_Truck_Parts_Accessories&hash=item20e24f81fd

xs750 tank=result, had to weld a patch plate to cover a weak spot on the underside of the tank near the fuel-tap, then used this kit.  That was two years ago and not one drop of fuel seen on outside of tank and it looks lovely clean, solid and smooth on the inside (its got a smooth silver finish)

Zephyr750 tank=mmmmmm?  tank wasnt leaking but i had enough of the KBS to do this tank as well...happy days.  Now, i have had a few small weeps from around the tank seams, but i believe this is from the tank expanding in hot weather, which is when its most noticable.  no leaks at all in winter!!  I think its NOT related to the KBS product, as i say the xs750 tank is now solid and leak free after treatment so i would recommend it on that basis.

check all their products cos hey have different sizes and types of sealants.

anyway, hope you get fixed

Duke:)                                                                                                                                                                             

Thanks for the input lads, I think the 3 part solution you used JP must have been POR15 if you got it from Frost's.

The KBS looks decent and has good reviews but available only from the US as far as I can tell.

Not had a chance to look at Classic Motorcycle Mechanics but I think I'm going to go with the POR15 solution when I get some free cash.

I72