While not vital, applying a sealant to block paving can help to prevent moss advancement and prolong the lifespan with the blocks. The sealant will fill the cracks and prevent dampness from penetrating the area, which might cause hurt over time. ​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​... https://localdrivewaycompany.co.uk/block-paving-fleetwood/