Secret to AN / Teflon fittings

[PaulProe]

I am using some Fragola AN-3 teflon lines to run from my reservoirs to the Master cylinders. No matter how many times I try to make up the fittings, they still drip.

I get a drop of Brake fluid (Wilwood 520) in about two weeks. It seems to come from the hose to fitting joint. I have made the joint per their instructions and it isn't seeing any pressure, only static pressure.

Are there any tricks to getting these to seal up?

On another can, the leak is coming from the fitting that goes into the can. This is made with a crush washer on the outside of the can. Which type seals better on a tin can, aluminum or copper? Is there any type of sealant that will withstand the synthetic brake fluid?

Thanks

Paul