Is JB Weld resistant to biodiesel and glycerine?
I'm thinking of making a large seperatory funnel from a 5 gallon water jug and a ball valve and I need some way to attach a ball valve to the mouth of the jug.

Go to lowes or home despot, find a fernco or a no hub type coupling that will fit over the neck of the jug, these are the rubber couplings with hose clamps on each end, then you can clamp a pvc pipe in the other end and use reducer fittings, as a general rule glues like JB will fail at the most inopportune time.

Hey biogator. I think the best way to find out if jb weld will hold up is mix the two parts, let it harden then submerse it in a mason jar of bio. If you do experiment with this ,let us all know how you made out.

I have had very good luck joining metal and plastic with an expanding polystyrene glue. Bordons Ultimate Glue & Loctite Sumo Glue. This might be a good solution where you don't have two closely mating surfaces. The glue will expand to fill the gaps.

Absolutely JB Weld (I use JB Quick since it sets up in 4 minutes) resists Biodiesel and glycerin. I use it all of the time on parts that are submerged in biodiesel or glycerin. I have been using it for over a year. Something else is as good or better than JB weld is the putty roll that has resin inside it. You just cut off what you need and mix it between your fingers and you can mold it to any shape you want and you have about 5 minutes before it starts setting up. It works very well with biodiesel or glycerin. You can buy it at Home Depot or Loews. Any brand is OK I have tried them all.

Of course, you could just buy a 5 gallon plastic carboy. The lids almost universally have a provision for cutting/knocking out a plug, which exposes female pipe threads.

You could certainly order one from US Plastics, but some camping places will have them in stock.

Then you're in business. No muss, no fuss.

HTH,

troy


troy

JB Weld has also been good for me with bio