Lime Plaster With the eye-catching, high-tech materials of our times, it’s not hard to forget the humble, tried-and-true methods that constructed our cultural heritage. One such ancient solution is lime plaster—a basic combination of lime, sand, and water that has adorned the world’s most beloved buildings for centuries. Beyond a mere wall finish, this venerable material is a triumph of human innovation, one with depthful historical, architectural, and environmental significance.