Skip to content
Aussieveedubbers

Seal/paint fuel tank interior

0 likes
Share Share on Facebook Share on X Share on Reddit

Aussie Officially Full-On Dubber

296 posts · joined Sep 2006 ·

#949350
Have my fuel tank out at the moment and noticed minor surface rust on inside surfaces. Anyone used one of those POR15 type treatments for the inside of their fuel tank?

h fractals - an ever changing lifestyle

7,671 posts · joined Feb 2005 ·

#949353
yes, POR15 is the go.
no correspondence entered into
too easy 👍
fractal geometry; the inner most limits of mind altering abuse

Fantasy http://seventhchronicle.com

Z = Z2 + C1/r = 1/0 = infinity

Barrels www.barrelman.com.au

VW Workshop - aircooledgarage.com.au
allcooled.com.au

psimitar Son of Jim - Creator of Good

2,506 posts · joined Jan 2009 ·

#949359
get rid of the rust with some Hydrochloric acid or any other acid removing product b4 deciding on the POR15.

Even if the tank has a few leaks at present it is still a better idea to remove the rust b4 trying to seal it.

Another way is to braze a tin plate over the area with holes in it 🙂
madness is in the eye of the beholder 👍

pod i`ve got to finish this thing one day

4,980 posts · joined Dec 2003 ·

#949361
h wrote:yes, POR15 is the go.
no correspondence entered into
too easy 👍
x2

great stuff has the wash and all the stuff needed, and it seals it up good ,used it on my 73 bays tank which came with a cup of rust when i bought it 🤪
before treatment


what it looks like after treatment
meetings 1st sunday of the month
check wbsite for location
All Welcome
http://www.flatfour.org/
and on Facebook https://www.facebook.com/FlatFour

hellbugged 48's and straight cuts

5,080 posts · joined Apr 2003 ·

#949362
Where is a good place to purchase this stuff?

Aussie Officially Full-On Dubber

296 posts · joined Sep 2006 ·

#949372
pod wrote:
h wrote:yes, POR15 is the go.
no correspondence entered into
too easy 👍
x2

great stuff has the wash and all the stuff needed, and it seals it up good ,used it on my 73 bays tank which came with a cup of rust when i bought it 🤪
before treatment


what it looks like after treatment
Wow that came up a treat 🙅 Is it fairly straight forward to do this? My only concern would be if there was some kind of reaction/paint didnt hold it would be a bugger to sort out...

pod i`ve got to finish this thing one day

4,980 posts · joined Dec 2003 ·

#949381
pretty straight forward ,as long as you follow the instructions ,you should have no problems
meetings 1st sunday of the month
check wbsite for location
All Welcome
http://www.flatfour.org/
and on Facebook https://www.facebook.com/FlatFour

psimitar Son of Jim - Creator of Good

2,506 posts · joined Jan 2009 ·

#949699
These guys are the main importer for POR products

Permenant Paint Coatings
madness is in the eye of the beholder 👍

vlad01 Compulsive Aussie Vee Dubber

4,270 posts · joined Jun 2010 ·

#949736
pod wrote:
h wrote:yes, POR15 is the go.
no correspondence entered into
too easy 👍
x2

great stuff has the wash and all the stuff needed, and it seals it up good ,used it on my 73 bays tank which came with a cup of rust when i bought it 🤪
before treatment


what it looks like after treatment
looking good 👍

71 notchback,
Past owner of, 70 NB, 73 SB and 72 FB TLE

vlad01 Compulsive Aussie Vee Dubber

4,270 posts · joined Jun 2010 ·

#949737
Aussie wrote:
pod wrote:
h wrote:yes, POR15 is the go.
no correspondence entered into
too easy 👍
x2

great stuff has the wash and all the stuff needed, and it seals it up good ,used it on my 73 bays tank which came with a cup of rust when i bought it 🤪
before treatment


what it looks like after treatment
Wow that came up a treat 🙅 Is it fairly straight forward to do this? My only concern would be if there was some kind of reaction/paint didnt hold it would be a bugger to sort out...
yes that part freaks me out from using it.

I am contemplating carefully slicing a tank into 2 at the factory weld, have the 2 halves stripped and then Tin plated just like dunydore tanks which are virtual rust and trouble free well past the 25 year mark. Then have the halves tig welded back together, coat of paint on the outside, call it done!

I don't think anyone has done this before but would love to try it.

71 notchback,
Past owner of, 70 NB, 73 SB and 72 FB TLE

psimitar Son of Jim - Creator of Good

2,506 posts · joined Jan 2009 ·

#949829
well my idea comes from specialist fuel tank reconditioners in the UK.

The hydro removes the internal rust and then brazing the patch on makes it liquid tight again. If you wish to stop further internal rust then use the POR15 on top of this.

It you're going to split the tank halves then you'll have to drill the spot welds out and then use a blowtorch to melt the solder and slowly prize the hlaves apart as the solder becomes liquid again 😉
madness is in the eye of the beholder 👍

HappyDaze Superannuated

2,887 posts · joined Jun 2009 ·

#949852
The two halves are 'seam welded' - a continuous resistance weld, and not spot welded. It would be almost impossible to separate the flanges.

Do not let any welding torch [gas or electric] anywhere near a petrol tank, without taking the appropriate safety precautions.

Unless there are big holes, or serious rust in the tank, POR 15 should work.
I'd rather wear a Beetle out by racing it than by polishing it!

vlad01 Compulsive Aussie Vee Dubber

4,270 posts · joined Jun 2010 ·

#949866
HappyDaze wrote:The two halves are 'seam welded' - a continuous resistance weld, and not spot welded. It would be almost impossible to separate the flanges.

Do not let any welding torch [gas or electric] anywhere near a petrol tank, without taking the appropriate safety precautions.

Unless there are big holes, or serious rust in the tank, POR 15 should work.
yeah its one continuous weld. you can separate them, very fine cutting wheel, a straight edge jig of sort would help, you cut off set to the factory weld , offset to the inside and super careful to not to cut both halves, only one.

Tried it before on one with bad rust, its fiddly but can be cut clean. welding I have not tried yet.

alternatively have 2 tanks and grind off one half preserving one good, then do the same but opposite half on the other tank, end result it 2 halves with flange intact.

but resistance welding it back together yeah 🤪

71 notchback,
Past owner of, 70 NB, 73 SB and 72 FB TLE

psimitar Son of Jim - Creator of Good

2,506 posts · joined Jan 2009 ·

#949956
HappyDaze wrote:The two halves are 'seam welded' - a continuous resistance weld, and not spot welded. It would be almost impossible to separate the flanges.

Do not let any welding torch [gas or electric] anywhere near a petrol tank, without taking the appropriate safety precautions.

Unless there are big holes, or serious rust in the tank, POR 15 should work.
Maybe later ones are made like that. From looking at my 59 tank it appears to be spot welded and soldered. Could be wrong tho 🙂
madness is in the eye of the beholder 👍

Aussie Officially Full-On Dubber

296 posts · joined Sep 2006 ·

#951861
Well, I have done the treatment so thought I would share my experience.

Kit was more expensive than I thought at $140 but it did include everything. A fair bit of cash to spend on a tank but these things arent that easy to find a decent replacement anymore. Worth looking after if you have a good one.

The overall process takes a bit of time and labour but not really that difficult. Overall finish inside now looks good so hopefully time will tell and this stuff lasts. 🙅

Pics below.... before, during + after.









donn Wolfsburg Elder

3,515 posts · joined Nov 2005 ·

#951886
Bloody hell Aussie, you must have a really small camera. 🤪
I dream of a day when a chicken can cross a road without being asked for it's motive!

psimitar Son of Jim - Creator of Good

2,506 posts · joined Jan 2009 ·

#951898
reminds me of what the KBS process looks like which POR15 is the same just the paint is different formula.

I shoulda pointed you at these guys to save you some cash, including postage.
POR15 Tank Kit from Frost UK

Exchange rate is well in our favour at the moment and postage is generally cheaper than from the USA 🙂

Oh, I also found this made by RustBuster
RustBuster Tank Sealer
madness is in the eye of the beholder 👍

Aussie Officially Full-On Dubber

296 posts · joined Sep 2006 ·

#951939
donn wrote:Bloody hell Aussie, you must have a really small camera. 🤪
Hey man, it is not the size of the camera that counts ........😂