About 2 weeks ago I hit something on the interstate, it popped up and punctured my poly fuel tank ( a hole about an 1/8"). I repaired it with some sealer and it lasted until now. I rolled under it today and found the patch was moist and a few drops on the ground. I used a fuel/oil resistant sealer, and reinforced it with fiberglass, it did not seem to adhere to the tank. I have searched several auto parts stores and the fuel tank repair kits are for steel tanks and specifically not for plastic tanks. the plastic tank repair kits say they are not for fuel tanks. Does anybody know of a product that will work? or I have also looked at plastic welding, but I ma not sure how to.

 

Far as I know poly tanks have no fix except replacement, plastic welding can only be done on non contaminated surfaces, i.e. before fuel is put into a tank.probably going to have to bite the bullet and buy a new one

 

There is a product called seal all it is in a yellow tube with red letters try that.

 

If all else fails you might try getting a corse threaded screw slightly larger than the hole and cutting a piece of inner tube or like rubber and removing all your patches and just screwing the item into the tank. Being plastic I would not overtighten, just snug using the rubber to seal and the screw to hold it in place. I have done this on metal tanks and it can be a long term repair but would worry about the screw stripping out on a plastic tank. Just another thought to try.

 

JB weld might work

that stuff is a life saver

if not

DUCK TAPE...LOL quick fix right?

 

i think the plastic is only repairable with a weld.

 

I just fixed a bad oil leak with some stuff called "The Right Stuff", made by Permatex. I called them and that's what they told me to use. The point here is, try calling Permatex and ask them if they have anything that will work.

 

My first fix was with the SEAL ALL stuff. good product just does not adhere to the plastic very well.

 

Did You Prep The Surface With A Scuff Pad Then Clean It With Alcahol First

 

yes, i used brake parts cleaner, sanded with 36 grit sandpaper, and cleaned with rubbing alcohol.

 

I think I'd hit the boneyard for a new tank. Should be cheaper than a new one. I like the screw idea too. I once was putting screws in the trunk of my car and yup, right through the tank. I never took that screw out, and never had a leak either.

 

I found something a product by versachem sold at Oreilly auto parts, it looks like it will do the trick, I put it on yesterday, it only needs 20 mins dry time, I let it set over night and I cant break it or peel it. we will give it a try. I will keep you posted if it works permanently. Thanks for the help.

 

I just found some stuff in my toolbox I had bought some time back and cannot remember what I bought it for or how it worked. It is called QuikSteel Plastic Repair and is made by CarGo. I know it would have came from Auto Zone or Advanced. It says "Ideal for repairing leaks in gasonline and diesel fuel tanks and rain gutters". The phone number on the literature is 936-539-1555. I remember now, I bought it for a part on my daughter's Explorer that was plastic and was on the cooling system. The replacement part was rather expensive. It worked for a long time, but, I ended up finally buying the replacemnt part. I would think it would work better on a fuel tank as where I was using it was on the engine and was subject to heat as well as pressure from the cooling system.

 

I have an older gas Ford Ranger (left from the kids). I wound up doing what donhov said and used a metal roofing screw (comes with a flexible washer) as a "temporary" fix. That was six years ago.

 

Might do the screw in the hole then put your ucum-pudy over that! Might help keep the screw sealed better.