So we're in the process of rebuilding the garage at our house, and there's a brand new slab in the new space... My question: should I spend the extra money to get it sealed/painted with something like this stuff:

http://www.rustoleum.com/CBGProduct.asp?pid=16

I was at home depot and saw it, wondered if something like this was worthwhile... I don't spend a lot of time working on cars, we have the normal kids and commuter cars usage on the garage... The wife loves things clean and nice looking, but garages end up with lots of dirt, dust, sidewalk chalk, spiders, leaves, etc blowing inside, so it's not clear to me the floor sealer will stop much of that..

Still, I'm open to suggestions and thoughts, if you have any.