There are various views on sealing driveways. Lots on here say you need to use a sealer that bonds the jointing sand??? I disagree to effectively seal IMO you need to penetrate the substrate and improve stain resistance. Bonding the joint kiln sand is altering what was originally done.
My two choices are Miracle Tile & Stone Sealer and Aqua Mix Penetrating Sealer. Yes I sell both before anyone asks but:
Both are easy to apply and both are good quality penetrating sealers at a very reasonable price per M2.
Aqua Mix is £21.59 with a coverage of of around 70M2 so 30p per M2
Miracle is £16.80 with a coverage of around 250M2 so 7p Per M2
Kev Martin
Tiling Logistics Ltd