UltraTech Ultra-Drain Seal Square Shape Drain Protection measuring 36" X 36" X 3/8" features a urethane construction that allows the pad to deform and seal off most drains temporarily to any smooth surface. Drain seal features a reinforcing mesh is sandwiched between layers of polyurethane for durability and resistance to tearing. Clear drain material provides unobstructed view of covered drains that enables responders to make sure a complete seal is made. It is ideal with SPCC and NPDES.