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post #1 of 16 Old 12-06-2012, 05:31 AM Thread Starter
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Plastic welding

Anybody know what type of plastic is used to make the gas tanks on mid 90's sleds? I wanted to use a plastic welder to repair a crack around the filler neck, but I need to know what type of rod to use. I've tried all the so-called fuel-proof plastic adhesives and they only last a short while and eventually start leaking again. I'm looking for a more permenant fix. Thanks.

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post #2 of 16 Old 12-06-2012, 06:53 AM
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Polyethelyne.The only way to do it correctly is a machine called a drader hot air welder.A rather expensive unit (we have a couple). Here is another option worth trying:
If there is a place on that tank that you can trim some extra material from (Flange possibly) without damaging it, you can use a soldering iron.You have to melt the crack area slowly by rubbing the iron on it.When it is molten, place the material in the crack and fill the void, while smoothing out.Its real hard to explain, but you almost create a "stitch " first ,before smoothing out.
Hope that helps

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Last edited by Thunderstorm; 12-06-2012 at 07:01 AM. Reason: spelling
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post #3 of 16 Old 12-06-2012, 02:29 PM
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if you angle out the crack first just like you would do a metal weld you will get much better results, because you will get full penetration of the crack, you can order the rods online they are fairly inexpensive. a soldering iron where you can adjust the temp is ideal. as all plastics have different melting points. a dremel tool works well for angling the crack. hope this helps
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post #4 of 16 Old 12-06-2012, 02:45 PM Thread Starter
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Thanks fellas. I've been looking into getting a good plastic welder. With all the things made out of plastic these days it seems like a handy tool to have in my inventory. You Tube has a lot of good videos showing how to do it.

Thanks again, THINK SNOW....we don't need another lame season like last year.

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post #5 of 16 Old 12-06-2012, 05:16 PM
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I have a plastic welder and used the fiber flex rods to fix a gas tank.


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post #6 of 16 Old 12-06-2012, 10:43 PM
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plastic welding can be a pain. I have tried to fix some old polaris tanks and To be honest, the area must be really clean. Most tanks will actually absorb small amounts of oil/Gas and there for Cause issues for welding

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post #7 of 16 Old 12-07-2012, 06:11 AM
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I did it Michigan style! Cleaned area around filler neck, mixed JB weld, laid JB in crack and smoothed out with heat gun and hasn't leaked in 3 years and doesn't look to bad!

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post #8 of 16 Old 12-07-2012, 06:23 AM
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Learned the JB Weld heat gun trick by accident when trying to speed up its drying time with a hair dryer once. Smoothes it out nicely.
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post #9 of 16 Old 12-07-2012, 12:47 PM
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Yes it does!

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post #10 of 16 Old 12-07-2012, 11:20 PM
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use seal all works well or use a solder iron and melt it back together works well too hope this helps
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