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-   -   Plastic welding: (http://forums.pelicanparts.com/showthread.php?t=1075622)

cabmandone 10-13-2020 06:50 PM
If it's HDPE, Permabond makes a product.
https://www.permabond.com/materials_bonded/bond-polyethylene-hdpe-ldpe/#:~:text=Cyanoacrylates,as%20well%20with%20polar%2 0solvents.

red-beard 10-13-2020 07:30 PM
We weld HDPE all the time. The vacuum fuel gas lines on the powergen set are 12" HDPE

cashman 10-13-2020 07:44 PM
Your white plastic tank is most likely PP or HDPE. PP will be a little translucent like a gallon milk jug (unless its pigmented). HDPE will be more like a cutting board in your kitchen. PM me your address and I can send you a couple feet of welding rod of each. Either 4mm or 5mm. Don't glue it. Glue bottles are made out of PP and HDPE for a reason. Mechanically fasten it with a gasket or weld it.

drcoastline 10-13-2020 07:56 PM
Quote:
Originally Posted by speeder (Post 11063534)
Thanks. Picture that thick white, semi-transparent stuff. That plastic.
Those tanks are generally polyethylene. The fittings are spun in, basically heat welded by friction. depending on the break it may be possible to re-spin the old fitting or go the next size up if you have room to get a drill in the space?

I'll see if I can find a video on the process.

drcoastline 10-13-2020 08:01 PM
<iframe width="560" height="315" src="https://www.youtube.com/embed/fMdLWAYr7Ck" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>

speeder 10-13-2020 09:10 PM
Thanks to all!
 
I'm going to pick up the RV in the morning and I'll take pictures of the tank and post them here. Really appreciate the help and kind offers. :)

Bigtoe32067 10-13-2020 11:34 PM
Quote:
Originally Posted by john70t (Post 11063670)
As corny as it seems, this infomercial product looks like it works. Not sure about the penetration.
(Dental type UV-cured bond glue.)

Bondic Review #2: Bondic plastic weld review

(skip to about 12:00 where he fixes a plastic tank full of water in only seconds)
<iframe width="560" height="315" src="https://www.youtube.com/embed/gunqs5qmc0M" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
I have several of these and they work great. They’re just kinda expensive. I used a whole tube to glue in a grill insert in my wife’s tundra. It’s very strong and durable. If I want to change the grill in the future I’ll have to break out the cutting wheel because it ain’t coming off.


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