The product is thinner than laytex paint and although a 3/8th nap is recommended if your using it for a stamped concrete patio I would suggest a 1/2 nap. It's best to use the roller as a squeegee for your first pass to ensure it gets in all the voids both large and small and then use the roller as intended to pick up and distribute the excess. This is a re-coat after 5 years and to be honest it should have been done the previous year but...that's how it goes. So I'm getting roughly 4 years out of the product in Northern Ohio.