Whilst not vital, making use of a sealant to block paving may also help to avoid moss growth and extend the lifespan of the blocks. The sealant will fill the cracks and stop humidity from penetrating the surface, which often can result in destruction with time. ​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​... https://localdrivewaycompany.co.uk/block-paving-fleetwood/