Tank sealent

colin davie

colin davie

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Jun 16, 2018
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My Norvil alloy tank has started weeping at the rear, i am thinking to use a tank sealer rather than look for someone who can weld it, what is the best sealer to go for that will withstand ethanol fuel,,,,,,,
Colin
 
colin davie said:
My Norvil alloy tank has started weeping at the rear, i am thinking to use a tank sealer rather than look for someone who can weld it, what is the best sealer to go for that will withstand ethanol fuel,,,,,,,
Colin
Click to expand...
Colin, I have used Flowliner from an old established company called Wylde’s. It’s been in my Morini Camel fiberglass tank going on 5 years, and not a sign of degradation.

Flowliner Armour Coat - 100% Ethanol proof petrol tank liner

Give your tank 100% protection from the ethanol in modern fuels. Suitable for all metal, plastic & fibreglass tanks.
cwylde.co.uk
 
colin davie said:
My Norvil alloy tank has started weeping at the rear, i am thinking to use a tank sealer rather than look for someone who can weld it, what is the best sealer to go for that will withstand ethanol fuel,,,,,,,
Colin
Click to expand...

Stop.

That is an EASY weld repair. As FE said, you cross a line if you line it.
 
Also, be aware that polymer adhesion to alu is problematic compared to steel. Really needs a good acid treatment to remove oxidized layer of alu then roughening up to make a good "keying" surface to bond with.
 
I agree with the others that welding is your best option and if you go the sealant route it will negatively affect welding in the future.
That being said , I think you will find the sealant question very divisive - like the oil threads , tire (tyre) threads and, currently, neutral or in gear at stop in traffic.
The naysayers feel that sealants will eventually fail causing carburetor problems. I have used the epoxy system from Eastwood Automotive in two of my tanks and one for someone else with no problems whatsoever. One of my tanks was done 15 years ago and used gasoline with ethanol for all those years.
Let us know what you choose ( and why ? ) and how you making out.​
 
I was able to fix my Aermacchi metal tank which had a slight leak with Original JB Weld. Not sure if a similar product is available in the UK.
 
Whilst I agree with Team “ weld it” Scotch Weld EC776 liquid sealer will do the deed .
Originally used in aerospace industry. Just FWIW.
 
TBW said:
Whilst I agree with Team “ weld it” Scotch Weld EC776 liquid sealer will do the deed .
Originally used in aerospace industry. Just FWIW.
Click to expand...
Agreed, HOWEVER, whatever flexure caused the weld seam to crack, will crack the glue.

The key is to have a professional weld it, and NOT grind away all the reinforcement (why it failed to begin with) for "jewelry" reasons. Let the weld remain, and do it's job.
 
Last edited:
colin davie said:
AAHHHHHH
I thought this may create a few replies......
so i reckon i will find some one to weld it up,,,,,
Thanks for your input
Click to expand...
Colin,
Myself I think you are doing the right thing by having it welded as you have a nice tank to begin with.
Just my two cents.
Mike
 
I used " Fertan Tapox" to try and seal mine. So far so good ! It was developed for proofing alluminium ethanol holding tanks from damage ? I believe ? A sealant I used 15-20 years ago decided to give in while holding +10 crap . The fertan is not easy to apply however requiring a slow delivery of air through tank (compressor) through petrol outlets venting through filler cap and also it requires to be over 18 degrees c for the 2 part epoxy mix to work. Despite that , although it is too thin to seal holes etc it should stop ethanol being a problem no mater the concentration !!! Will report on any developments ! I only had a "weep" so OK. Before and after . Roy.
 

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