How can I stop weeds from growing up in my paver joints?

Weed growth in paver joints can largely be prevented by installing polymeric sand in the joints. Polymeric sand contains a bonding agent that coagulates the sand while remaining flexible. Improperly installed polymeric sand can cause a semi-permanent haze on the surface of the patio or driveway. This is not covered under HIGH FORMAT’s warranty. So polymeric sand should only be installed by an experienced contractor.