New Fiberglass SFC fuel tank and lining w/ Grey Casewell liner

minigunz

minigunz

New member
Location
Ontario CALIFORNIA
Hi everyone
I have used Grey Caswell fuel tank liner for years without any problems in Steel fuel tanks.
Here is my question this 750 SFC tank is clean inside and has never had fuel of any kind.
Coating it with Caswell Grey could prevent any future problems from Non-Ethanol race fuel.
I am looking for Good advice from the Owners in authority on SFC fiberglass tanks and do they have any concerns
with this product? The other sealers on the Market are junk and I have never had good experiences with them.
Caswell sealer is used in Fiberglass boat fuel tanks and some Vintage airplanes with success so I will wait to see what
the Forum owners have to say.
Thanks to all for your time.
 
I used Tank Cure inside my fibreglass spaceframe tank to do the same job. It worked well after I swilled the tank out with acetone to key the surface by making it slightly tacky. My first attempt with the untreated brand new tank saw most of the sealant pour out because it didn't adhere.
And yes, I'd carefully followed all the instructions and it was a lovely hot sunny day here in the UK.
 
Hello Steph,
some years ago I coated the tank of my Spaceframe with a product of 3M because it was leaking after a crash.
Though the tank was used I never had any trouble.
If you are interested I look for the exact marking of the product and the cleaner which I used before.
Cheers
Luigi
 
Thanks Luigi
All my 750 tanks are already coated :)
But why not sharing with all here the reference of your 3M product if it's giving good results ?

Beside that it is "minigunz" who is looking for feedback and advises regarding Grey Caswell liner in a SFC fiberglass tank though.

Cheers
Stéphane
 
Do you know who made the tank ?. I bought a new sfc tank from Europlast and they claim to have used specific resins that endure modern fuels and that no coatings are necessary . So far no problems . Perhaps you have a tank they made would be good to know.
 
Treated a 1968 Spitfire BSA fiberglass tank with Caswell. That was in 2012. No problems ever. I've used Caswell in at least 4 tanks including an SF2 and it's the only liner I'll use. First liner I ever used was on a Norton Interstate fiberglass tank. Kreem. Stuff is so bad it should be taken off the market.
 
minigunz said:
Hi everyone
I have used Grey Caswell fuel tank liner for years without any problems in Steel fuel tanks.
Here is my question this 750 SFC tank is clean inside and has never had fuel of any kind.
Coating it with Caswell Grey could prevent any future problems from Non-Ethanol race fuel.
I am looking for Good advice from the Owners in authority on SFC fiberglass tanks and do they have any concerns
with this product? The other sealers on the Market are junk and I have never had good experiences with them.
Caswell sealer is used in Fiberglass boat fuel tanks and some Vintage airplanes with success so I will wait to see what
the Forum owners have to say.
Thanks to all for your time.
Click to expand...
If original tank put it on the shelf & consider buying a repop glass tank or an alloy tank- here's a suggestion:
tabclassics.com

Laverda style fuel tank - Tab Classics

Our handmade aluminium Laverda style fuel tank. Please note that this is supplied with a standard Monza cap. Available polished or with a sanded finish.
tabclassics.com tabclassics.com
 
"If original tank put it on the shelf & consider buying a repop glass tank or an alloy tank- here's a suggestion:"

Been considering the same situation, not personal but....

Small issue of cost not to mention the hassle of importing into USA with the tbd depending upon when it may arrive tariffs and limited shipper choice options! And then there's the obviously incorrect filler cap.

I'm currently buying nothing from outside the USA except when carrying it back in my airline baggage. Loss of de minimis is catastrophic on small value items both to seller and buyer.

For the example: "Price excl. VAT: GBP 900.00" (today about USD 1300) - now add the tarriff - unknown, could be 15%, add USD 195, then there's the shipping and import duty processing fee (let's guess GBP 100 + USD 50) for close to USD 200, so we may be looking at USD 1695 total in today's poor USD exchange rate and tariffs situation - perhaps wait a while and see if things get better?

By comparison a trial of the epoxy liner looks like a bargain!
 
  • Like
Reactions: IAG
I've used a resin sold by a French classic vehicle concern.
Has been fine in both the new SFC tank and the replica tank on the TT.
Paul
 
steph said:
Thanks Luigi
All my 750 tanks are already coated :)
But why not sharing with all here the reference of your 3M product if it's giving good results ?

Beside that it is "minigunz" who is looking for feedback and advises regarding Grey Caswell liner in a SFC fiberglass tank though.

Cheers
Stéphane
Click to expand...
Hello Luigi
I looked up TANK CURE and it's not available in the USA
The Caswell is the next best thing so far.
The SFC paint is what I worry about, so I need to plan this coating project very carefully in order to keep
the tank and paint job from getting damaged.
Thank you all for the input on this subject.
Jeff Minigunz
 
minigunz said:
Hello Luigi
I looked up TANK CURE and it's not available in the USA
The Caswell is the next best thing so far.
The SFC paint is what I worry about, so I need to plan this coating project very carefully in order to keep
the tank and paint job from getting damaged.
Thank you all for the input on this subject.
Jeff Minigunz
Click to expand...

Extra pillows in the cement mixer then.
 
My SFC tank is still the original. haven't used ethanol fuel in it to my knowledge. If so it got burnt pretty quick.
Still in great condition after 45 years of ownership. The carbon tank I made for the Motodd are still sound after 13 years of having fuel in it.
I used West System epoxy when laying up the carbon. Tank liners for me are a last resort but if I was to go down that route I'd be using Caswells.
As mentioned previously I'd put it on the shelf and get a repro especially if you plan to go racing. Also the fairing as well.
At some stage I plan to make a carbon SFC tank.
 
minigunz said:
Hello Luigi
I looked up TANK CURE and it's not available in the USA
The Caswell is the next best thing so far.
The SFC paint is what I worry about, so I need to plan this coating project very carefully in order to keep
the tank and paint job from getting damaged.
Thank you all for the input on this subject.
Jeff Minigunz
Click to expand...
Hello Jeff,

finally I found the cans of the stuff which I used for my Spaceframe tank. After a break of driving of 6 years (covid and more) last week I filled it with fuel. Perfect, no trouble. Though it was a used tank but I cleaned it before with a cleaner for aluminium which is as well very good to clean carburettors and to use it in an ultrasonic cleaner. After cleaning a tank I fill it in a canister and use it for other purpurses.
The 3M Scotch-Weld 776 (the name was changed) should be available at a paint shop or on the internet
https://www.3mdeutschland.de/3M/de_DE/p/d/b40067203/
3M Deutschlandhttps://www.3mdeutschland.de › 3M › de_DE › p › d › b40067203

3M™ Scotch-Weld™ Fuel Resistant Coating EC-776 Quart, 12 per ...​


Resists oil, gasoline, and aromatic fuels (non-resistant to fuels containing alcohol)

The aluminium cleaner I bought at Ammon (adress on the picture)
The offer also "Kreem weiss" which I used very often and successful for steel tanks.
I could not use the Kreem weiss for the Spaceframe because it has a "window" to check the fuel level. Scotch-Weld is a clear coat.
In my experience it is very, very important to let the tank dry carefully after the cleaning to be sure that there is no more liquid in.
As well it is very VERY important after the coating to let the coating dry. The best place for that is on the heating in the living room for some weeks. Your wifies will love you for that 👿
Best Regards
Luigi
 

Attachments

  • 20260314_162649.jpg
    20260314_162649.jpg
    149.7 KB · Views: 3
  • 20260314_162628.jpg
    20260314_162628.jpg
    137.6 KB · Views: 3
  • 20260314_162600.jpg
    20260314_162600.jpg
    95.8 KB · Views: 3
You must log in or register to reply here.
Back
Top