Features: LONG-LASTING PROTECTION FOR BLACK LIMESTONE & SLATE SURFACES - Our advanced black limestone sealer is meticulously formulated to offer superior protection for black limestone and slate patios and other surfaces. Protect your valuable outdoor surfaces with our sealer's unrivalled barrier against stains, moisture, and damage. Seal your black limestone or slate and have peace of mind like never before REVIVES FADED BLACK LIMESTONE OR SLATE TO A RICH JET BLACK - Our Smartseal Black Limestone Sealer does more than protect; it rejuvenates and recolours your faded limestone and slate. Watch as your faded patio returns to the captivating jet black of its first day, breathing new life into your limestone or slate surfaces. Easy to reapply, it ensures your black limestone and slate patios or paths always look their best EASY-TO-FOLLOW APPLICATION – Clean the surface of your limestone or slate patio using a pressure washer or Patio Clean Xtreme, then let it dry thoroughly for at le