Let me start by saying the Rust-Oleum Floor Coating Additive itself is fantastic stuff. I've used it to add traction to my garage floor coating, and it worked like a charm - no more slipping when the floor gets wet!
The texture it creates is just right - not too rough to walk on barefoot, but provides excellent grip. I mixed about half this 1lb container into my gallon of floor paint, and the coverage was perfect for my standard two-car garage.
Now for the weird part... My order experience was bizarre. Instead of receiving the 3 containers I ordered, I got 4 car batteries! Completely wrong items. Had to go through customer service hassle to get it sorted.
Pro Tip: If you're ordering this, maybe double-check with the seller about inventory accuracy first. The product itself gets 5 stars from me, but the shipping experience was a solid 0.
Once I finally got the real product though, application was simple. Just mix it into your coating until you achieve uniform consistency. Dries to a nice off-white color as described.