Transform your black limestone surfaces with the SmartSeal Black Limestone Sealer, a highly effective solvent-based sealer and re-colourant. This black limestone sealer gives a magnificent jet-black finish that not only covers the surface but also protects it from moss, algae and lichens. It's easy to maintain, and with minimal effort, you can enjoy a beautifully preserved limestone surface for years to come. Instead of having to frequently clean your limestone or slate patio, maintenance is easy once applied. Simply hose it down and sweep it every three months, and your surface will always look great. The sealer does more than just protect; it rejuvenates and recolours your faded limestone and slate. You'll be amazed as your faded patio returns to the captivating jet black of its first day, breathing new life into your limestone or slate surfaces. Plus, it's easy to reapply, ensuring your black limestone and slate patios or paths always look their best. Application guidelines: Clean the surface of your limestone or slate patio using a pressure washer, then let it dry thoroughly for at least 72 hours. Apply two coats of this sealer with a roller, ideally in temperatures between 12°C and 23°C. Quantity: 5L.