Help Troubleshooting Drip from Newly Installed Oatey No-Caulk Drain

[DIYCHASE]

I recently installed a Delta shower pan along with an Oatey Round No-Caulk Black ABS Shower Drain. When I tested the pan and drain for water retention, I noticed a small drip (see attached video).

The drip seems to originate near the connection between the drain pipe, the no-caulk barrel, and the rubber pipe gasket. I’m trying to figure out if it’s clear what I might have done wrong.

• Could it be that I didn’t tighten the locking ring enough? For what it's worth, when I originally found the drip, I went back and got another 1/8 spin out of the locking ring, but that didn't solve it.
• Is it possible the rubber pipe gasket isn’t seated correctly?
• Or does this align with any other common issues you’ve encountered?

For context, I followed the manufacturer’s instructions for both the pan and the drain to the letter. Any insights or tips would be greatly appreciated!

I considered using Great White Pipe Joint Compound between the end of the pipe and the rubber gasket but I saw a warning in the installation instructions that said "Do not use oil base sealers on any plastic No-Caulk Shower Drains, because it may cause assemble to break or distort. Only use an A.S.T.M. recommended silicon sealer."

 

[Geofd]

I use food grade grease on a lot of threads you could try that

 

[breplum]

Something is not right. I have to state we would never use the plastic drains. The Oatey or eq. brass no-caulk drains is what we use and have never had a drip in fifty years.
We also use use the dedicated drain tool but that little bar that comes with it I suppose can work.