Penetron Shows the Way to Waterproof Concrete in Azerbaijan Share Article Positioned on the shores of the Caspian Sea, the aptly named towers of the Lighthouse Residence in Nardaran (Baku), Azerbeijan welcomed their first residents in March 2021. The Penetron System was used to treat all below-grade and exposed concrete structures to ensure durability and resistance to the saltwater environment. Beacon of waterproofing in Baku: The Lighthouse Residence used PENETRON ADMIX for the outdoor pool, foundation slab, retaining walls, elevator pits, basement rooms, and underground parking garage. With views of the Caspian Sea and luxury amenities throughout, the Lighthouse Residence offers a ‘Florida lifestyle’ experience. The project contractor also wanted a high level of durability for the concrete elements to prevent deterioration from exposure to the chloride ion environment.