CapillaryFlow is recognized as the World’s Leading Bunker Liner, and the most durable bunker construction method. Over 1,000 courses around the world have built or renovated their bunkers with CapillaryFlow, including dozens of golf’s top 100 courses. At the core of our solution is Capillary Material, a patented and engineered polymer-based concrete, is the only building material that can move water both up and down to precisely regulate the moisture of any adjacent material, such as bunker sand.