looks like rustbullet.com updated their "faq" to include concrete application:
Will Rust Bullet protect a concrete shop floor?
Yes. Rust Bullet, with its Superior Patented Technology for rust and corrosion control provides outstanding protection to many surfaces, including concrete. Rust Bullet not only improves the appearance of concrete, it provides an impervious shield allowing easy clean up of oil, grease and chemical spills along with strong protection against impact and abrasives. Concrete has been a reliable and versatile product for centuries. Chosen for its strength and durability, concrete is expected to withstand the most abusive conditions. It is subjected to the destructive effects from harsh chemical spills, abrasive objects, moisture and the impact from heavy tools and machinery often resulting in an unsightly appearance and damage requiring costly repairs or replacement.
Rust Bullet protective coating will:
Provide excellent chemical resistance
Provide protection from abrasives
Seal a surface from moisture
Allow easy clean up of spills
Prevent concrete from sweating
Reduce dust
Fill cracks, gaps, and chips up to ¼ of an inch
Enhance appearance
Add years of life to concrete surfaces
Power wash or simply rinse off dirt and debris and let the surface dry completely before applying Rust Bullet. Two to three coats of Rust Bullet is usually sufficient for most concrete applications depending on the concrete’s condition and existing damage. Porous concrete and heavy traffic areas may require additional coats. Rust Bullet is self leveling and can fill in cracks, gaps and chips up to ¼ inch. If a slip resistant surface is desired, sprinkle silica or similar fine sand over a tacky coat of Rust Bullet, allow just enough time for the sand to adhere, then apply the final coat of Rust Bullet.