Driveway Cleaning - Swansea, Neath Llanelli areas. Swansea Clean and Seal offers Pressure Washing Services for your Patio Cleaning, Blockpaving and Imprinted Concrete Drives and to the very Best Standards. We specialise in not just Cleaning but offer a Cleaning & Sealing service for your Driveways and Patios. If you have Sandstone, Limestone or a Slate Patio that needs Cleaning & Sealing we can help you Guaranteed. Is your Imprinted Concrete Drive looking worn and lost its Colour ?