I suspect you mean the Liquid Wrench Dry Silicone Lube, which carries the words "great for slideouts" or some such on its label. I have a can, though I've never used it on the slides - there generally is no need for it. The Liquid Wrench a good "dry" lubricant, one that leaves no oily residue to collect dirt. I use mine to lube things that I want to stay clean and not put oil stains onto clothing, hands, etc.
2004 American Tradition; 2014 Buick LaCRosse
Homebase in the Ocala Nat'l Forest near Ocala, FL