• Fast & Simple to Install • No specialist equipment required\t • Exact Dosage \t • BBA Approved • White but dries clear Dryrod® Damp-Proofing Rods are patented, 12 mm diameter grooved rods that carry a powerful water-repellent material. The rods are inserted into pre-drilled 12 mm holes along the mortar lines of a building. The water-repellent material diffuses deeply into the damp masonry, curing to form a highly effective barrier to damp. This results in a damp-proof course which stops further rising damp from occurring and helps the wall to dry out. Coverage: 4.5” thick wall – 42 rods 9” thick wall – 84 rods