HFL200 is designed for interior use only and can be applied up to 2 inches in depth, making it ideal for a wide range of leveling needs. It bonds securely over well-adhered adhesive residues, including cutback adhesives, ensuring reliable performance across challenging surfaces. Each 50 lb bag is packed with flowable strength, delivering smooth, even coverage with minimal effort. And with a walkable surface in just 3 to 4 hours, HFL200 keeps your project moving forward. PrepWorx HFL200 – deep leveling, high flow, dependable results.