Goo in the socket?

I purchased some LED bulbs (1157) to install in my dim backup lights. I was kind of surprised when I discovered they were not held in by the small prongs and sping contacts, but by this weird goo. I'd post a picture but it says everything too large...
Is this normal? I went on Ebay and looked at some replacement sockets for the backup light, and yes they were full of this yellow goo. I must have missed something, the last 1157 socket I had my hands on had two contacts on the bottom with small springs underneath that kept pressure on the bulb contacts when you twisted the prong in the slots...
Also the LEDs hit the outside of the sockets and would not go down far enough to engage the slots.
This is a thing I've never seen before...

The contacts are spring loaded. The goo is a factory applied waterproofing that petrifies over the decades. The bulbs are still retained by their bayonet pins. You might have to free up the contact springs with solvent.

There are certainly LEDs that are direct replacement. Not really sure what you have if it interferes with the socket.

That makes sense. Things do get damp back there.I found a nice piece of cardboard soaking in the spare tire well. I think it was supposed to cover the drain hole...

The metal shaft need to be about 1/16" longer as the body of the LED doesn't taper like a regular 1157, makes a hard step to the larger diameter. I haven't got the electric calipers out yet. I may need a different bulb, like a projector style.

There are two pins on the bulbs, they are at different levels. If you put it in backwards, it will not engage the locks.