This is largely dependant on the type of sealer that you use for your driveway and the type of concrete that needs to be sealed. Generally speaking the epoxy based concrete driveway sealers tend to provide a more slippery surface when wet. The reason that they can make concrete slippery is because they form a thicker layer on the surface. If you’re looking for a concrete sealer which won’t become slippery when wet, then look for concrete sealers that allow you to mix in a non-slip additive or avoid epoxy-based products.