Peep, here's one anti-slip paint-on product. Looks affordable and has good reviews. They have clear and colors.
Lee
Sure Step 1 Gal. Acrylic Gray Pearl Anti-Slip Interior/Exterior Concrete Coating SU-0308 - The Home Depot
The Sure Step 1 gal. Acrylic Gray Pearl Anti-Slip Concrete Coating provides a durable, skid-resistant finish for a variety of interior and exterior surfaces. It is ideal for tennis courts, patios, walkways,
www.homedepot.com
Lee