Made from copolymer, it is pressure-resistant, temperature-resistant, corrosion-resistant, and wear-resistant. Prevents spills during the filling, unloading, cleaning, and maintenance of heavy equipment. During normal operations, loading, and unloading, the sidewalls remain in a low position. Vehicles and equipment can drive in/out from any angle without the need to install or remove the sidewalls. In the event of a spill, the containment dike automatically rises with the liquid level of the spill. Oversized models are supported by movable hinges for safer use.