spat
.700 Nitro Express
It's also one that everyone is comfortable being around their food.It's a viscous water soluble lubricant. Some oil based lubricants are not desirable in that they degrade the seals. KY is also a water based lubricant, unfortunately the federal inspectors would end up licking the doors.
Don't underestimate the value in that.
Even if you produced an "industrial o-ring lubricant" using the exact same ingredients, it would make people nervous in ways that grandma's dish soap just doesn't.