The better quality home center stuff works ok for the price- I did my girlfriends fathers garage floor with it 2 years ago and it still looks new.
The secret is to get the floor clean first- He had 50 years of old grease,
oil and previous paint on the floor- I used the provided cleaner, bought more,
and finally used muriatic acid to clean the floor before I was convinced it
was ready to do. He parks a 46 Lincoln v12 convert on it so it gets it's
share of stress! Good luck Jim