I used AR350 to seal and enhance our 5 year old paver driveway and walkway and used it on our 15+ year old colored and stamped concrete patio with dramatic results.  It enhanced an already attractive paver driveway and brought our concrete patio back to life.  I applied two coats as recommended and I used the anti-slip additive on both as well.  Neither had been sealed before.  I could not be more pleased with the outcome.  Great product.  I'm considering using one of their colored products on my concrete garage soon.