What would the "GLIDE EXP. DATE" mean printed on a spool of 18/02P cable?

I'm a Systems Administrator, but I verify all the deliveries to all teams under our Director, including the AV team. Our AV guys didn't know/care what it meant, so I thought I'd ask reddit.

The cables felt dry, but my first guess was maybe it's a wax or lubricant to help pull the cables during install?