Afterwards
Care: little, but regular
Day to day, a broom and water are enough. You can use a pressure washer without worry — the sealer stands up to the jet.
One thing you must not use: road salt. Salt attacks the sealer and shortens the life of the surface considerably. Clear snow in winter with a shovel or broom. If you have to grit, use chippings, sand or gravel — no salt and no salt-based de-icers.
The sealer is the wearing part of the surface. Depending on load and sunlight it will go dull at some point — then it is refreshed, rather than the surface being replaced.
Two cases where we advise against it
The ground has just been filled. Soil that is still settling will give way later — and a continuous concrete slab cracks if it has to move with it. In a case like that we would rather wait a season until the ground has come to rest.
Services are to be laid under the surface later.
A closed slab has to be cut open for that — considerably more work than lifting a few rows of interlocking pavers. If you are planning something like this, tell us beforehand.