The phrase "black latex" refers to a type of material that is both black in color and made from latex, which is a stretchy and waterproof substance. Full definition
Text in matte black latex paint, or vinyl letters applied onto the wall; dimensions variable. (widewalls.ch)
I think it would be easier and less expensive in the long run since you would have to buy black latex paint anyway. (inmyownstyle.com)
To finish the ladder, I used black latex paint (that was leftover from painting the handrails in my foyer), Rust - Oleum Weathered Gray Wood stain and Minwax Wood Finish stain in Special Walnut (leftover from refinishing our floors). (worthingcourtblog.com)