I may or may not help. I gave some serious thought to sealing the tile and grout I put down around the pool but, based on some pretty experienced opinions, the thinking was the UV light from the sun and general wear and tear would pretty much wear out the sealer in a season or so...perhaps less.
Also, I can't imagine ANY sealer that wouldn't reduce the traction of your pavers....just the very nature of sealing would make them more slippery.
My tiles have been down for about five years and the grout has taken on a very "weathered" look that may not be the prettiest but it's OK and I don't have to EVER do anything to it.
Johnbridge.com is the best tile forum on the net, IMHO, and they may have a better answer over there.