Dampproofing the cavity side of walls reassures that water won’t penetrate the masonry. Mar-flex Waterproofing and Building Products offers treatments specially designed for cavity walls. Mar-flex Moisture Block 361 is a patented, asphalt emulsion coating, which is designed to dampproof concrete and masonry surfaces. Its a single component liquid applied coating with great resistance to changes in temperature. It has excellent resistance to water penetration and the weathering process. Mar-flex also offers DampFusion. DampFusion is an excellent water-based acrylic dampproofing membrane approved for masonry, block, pre-cast, and poured concrete wall foundations. DampFusion is a spray-on membrane, and can be applied to pre-existing damp walls and the top of foundation walls. This  product has no odor and dries to a gray color to match the concrete.  Mar-flex offers the best cavity wall treatments in the industry, so check us out today.