can u fix a crack in fuel tank?

[shillo]

ive tried araldite, that does not stick to that type of plastic

ive tried fibre glass, that just popped off to

ive tried clear silicone, that just swelled up inside the tank and dropped off.

 

the crack is small about 10mm, and directly opposite the filler hole so you can dribble adhesive on to the crack.

 

any other ideas?

[Dean Lofthouse]

I'd try araldite again, only this time clean the plastic to be glued with thinners and maybe even rough the area with sandpaper as a key

[Chris Sheppard]

There is a two part adhesive that is specifically designed for fixing leaking tanks - oddly enough called "tank fix" never tried it on plastic but it reckons it will bond to most surfaces.

 

I'd try repairig the outside rather than the inside, a bit of a rough up around the area with some wet and dry and then smooth a thin layer of whatever epoxy over it. won't look pretty but at least it's then got something to stick too rather than a shiny smooth surface.

 

EDIT: Dean beat me to it

[Justme]

Hot glue gun?

 

Or a hot knife on the outside if you can strip it?

[morten]

ive tried araldite, that does not stick to that type of plastic

ive tried fibre glass, that just popped off to

ive tried clear silicone, that just swelled up inside the tank and dropped off.

 

the crack is small about 10mm, and directly opposite the filler hole so you can dribble adhesive on to the crack.

 

any other ideas?

 

What about trying to mend the crack by melting the plastic with a soldering iron. No idea if the plastic will melt but you could try it out first.

At least, you wouldn't have to require a "foreign" adhesive adhere to the plastic and withstand solvents (petrol).

[Daniël Bos]

I put my billhook through my fuel-can (wich admittedly is made of some different sort of plastic I think, but has to deal with much higher pressure) and managed to fix it with a combo heat and balertwine (the orange kind).

I first smeared over the crack with a red-hot knife (and later learned my wife would rather I didn't) and then kept melting balertwine on it, shaping it, melting, shaping etc until I was happy. This has worked just fine for two years now.

[Midway]

Have a look at JB Weld or JB water weld amazing stuff.

[treequip]

ive tried araldite, that does not stick to that type of plastic

 

Epoxy resin (Araldite) will stick to just about anything, unless you have a layer of 2 stroke oil and crud on it, do what Dean said.

[Bob Slade]

try chemical metal, sorts most things

[Cut4fun]

Seal All in yellow tube red letters and also JB weld works good too.

 

http://www.eclecticproducts.com/sealall.htm