The UltraTech 2131 Ultra‑Drain Seal is a compact, reusable urethane pad designed for rapid emergency sealing of square floor or storm drains. Measuring 36″ x 36″ x .4″, it instantly forms a tight seal on smooth surfaces—no “top” or “bottom” orientation required. Ideal for spill response kits and stormwater protection, it reliably resists oils, fuels, water, and many chemicals and cleans easily with soap and water