New old stock pinhole sealer from Peugeot.
These are definitely expired but still look cool on the shelf.
This product was designed to plug pin holes in your gas tank. You would clean out the tank, pour the contents of the bottle into the tank, then lean the tank so the liquid starts to pour through the pinhole. After letting it sit for 48 hours, the pinhole is supposed to be filled and you can then fill it up with premix and ride off with a leak-free tank. You can't do that with this stuff anymore but it sure is neat to look at.