Sealing fuel tanks Best sealant

[sefh3]

Can Dirko be used to seal a fuel tank? I know crankcases are sealed with Dirko but I have never tried sealing a fuel tank. If Dirko isn't recommended what would be?
Please advise.

 

[Swamp Man]

i have had good luck with a product called seal all it is made for things that deal with gas and oil

 

[sefh3]

BTW it's on older smaller Mac. It's a mag case not a plastic fuel tanks.

 

[blsnelling]

For a permanent assembly, JBWeld works great.

 

[diggers_dad]

I've used "Seal All" on plastic fuel tanks with very good success. It's made especially for sealing gas and oil and can be used on metal tanks. I've used it on a number of other projects including sealing coolant return tanks, ripped seat covers, on and on. Good stuff and usually around 4 bucks for a tube. Surface prep is, as always, important...clean and dry.

I get it at my local hardware store.

Seal-All Adhesive Product Information

 

[Mad Professor]

Seems to be a NEBULOUS QUESTION ????

i''d seal in metal cans, with WAX on the caps, but I'm just a chemist.

for a polymer tank? What is it made of?

 

[mad murdock]

In the aircraft maintenance world, we use a product called proseal. It is a 2 part sealer that is impervious to all types of fuels and hydrocarbon compounds. A retail outlet for it would be Aircraft Spruce and Specialty co. Pilot Supplies, Avionics, and Homebuilt Aircraft Parts from Aircraft Spruce and Specialty Co.
There are a couple manufacturers of it, the one we use in our shop is flamemaster.

 

[Justsaws]

Can Dirko be used to seal a fuel tank? I know crankcases are sealed with Dirko but I have never tried sealing a fuel tank. If Dirko isn't recommended what would be?
Please advise.

Dirko does not last.

SealAll does not last.

What model Mcculloch?

 

[sefh3]

Don't tell anyone but I have 5-6 mini Macs with leaking fuel tanks. I'm tired of moving them around, so I might as well fix them.

 

[mattinky]

The best product I've used is Kreem, it's hard telling how many motorcycle tanks I've sealed with that stuff over the years.

 

[kodiakyardboy]

In the aircraft maintenance world, we use a product called proseal. It is a 2 part sealer that is impervious to all types of fuels and hydrocarbon compounds. A retail outlet for it would be Aircraft Spruce and Specialty co. Pilot Supplies, Avionics, and Homebuilt Aircraft Parts from Aircraft Spruce and Specialty Co.
There are a couple manufacturers of it, the one we use in our shop is flamemaster.

An aircraft product called "flamemaster"? Just doesn't seem right!

 

[mad murdock]

If you aren't familiar with it, a few tips
1. Be careful in the application, a messy job is difficult to clean up!
2. Use nitrile or latex gloves, clean up is not easy! Usually have to wear it off the skin.
3. Cleans up best with MEK(methyl ethyl ketone), acetone kind of works.
4. Clean up before it cures.
5. Follow mixing instructions(usually 10 parts per 100 by weight).
Lastly-when selecting which one(there are many flavors), the higher the "B" number the longer the cure time and pot life, i.e. B 1/2 will cure in about 30 min. B2 will cure in about 2 hours, if mixed properly.

 

[redoakneck]

I just sealed a seam on a plastic 038 super gas tank with JB weld. Hope it works. Got a runner for 20 bucks b/c of the leak

 

[redoakneck]

The JB weld repair started leaking again. I don't know if I didn't prep properly or what, but it didn't hold. May try to melt it back together.

 

[Somesawguy]

I fixed the fuel tank on my snowblower with JB weld as a temporary fix. 3 years later it's still holding fine. I do have a spare tank just in case it lets go. :hmm3grin2orange:

 

[Fedaburger]

opcorn:opcorn:

 

[Fedaburger]

My Jonny has a leaky seam at the foot pad of the handle. I successfully temporarily sealed it with permatex high heat gasket maker. The red stuff. Took some sand paper to the spot to be sealed and cleaned it real good no more leak. Just until I find my permanent solution. Either an inside tank sealer like for the car tanks I was thinking, or an epoxy. I really like the soldering gun method, sounds like a more robust fix,plastic welding with weedeater line. Just some thoughts I've had and methods I've read on AS. The metal tanks obviously would be best with welded repairs.

 

[blsnelling]

Preparation is critical. It must be 100% oil free and the surface roughed up.

 

[ZeroJunk]

I sealed an 038 with JB weld a couple of years ago and it is still holding.

I sanded it with some 320 grit or so and cleaned it with starter fluid.

Then I just spread it out over the area pretty thick.

It's right on the bottom where the saw sits and gets drug around.

The guy brouht it back in last week with other problems and the repair still looks good.

 

[blackoak]

Don't tell anyone but I have 5-6 mini Macs with leaking fuel tanks. I'm tired of moving them around, so I might as well fix them.

Man!! if you have that many mini macs,,,your a glutton for punishment:hmm3grin2orange: