The spill drain seals secure spill containment for outdoor drains that will last. The Ultra-Drain Seal Plus ® are great for use in parking lots, loading docks, and other moderate traffic areas. The drain seal consist of two layers, a top layer made of rugged polyethylene to be able to withstand the harshness of the outdoors and the vehicles that may be moving over it. The bottom layer is made of a flexible Urethane, with its rubber-like qualities it does not absorb and helps seal the drain while being very durable. The Ultra Drain Seal Plus comes in three different shapes; square, rectangular, and circular.