Ultralite S1 is a one-component, high-performance, flexible, lightweight, cementitious adhesive with no vertical slip and long open time and extremely high yield. Easy to apply by trowel with excellent wetting properties.Suitable for ceramic tiles, stone and thin porcelain tiles.Ultralite S1 is a C2TES1-class cementitious (C), improved (2), slip-resistant (T), extended open time (E), deformable (S1) adhesive. Ultralite S1 is available in Grey or White.