Interlock cement block paved driveways should be coated with a sealer to protect it from the elements. Wear and tear is high if the blocks were not protected as cement/sand particles emit from the substrate. Fungi grow and discolour the blocks due to absorption of water. Calmarc driveway sealer which sits on top of the driveway, acts as a barrier that prevents water, vehicle fluids, the sun and chemicals from staining. It reduces wear and tear by bonding the cement/sand particles on to the substrate and enhances the aesthetic value of the property by eliminating the tired look.