A spill response drain cover is one of the easiest and most effective way to stop a spill. But how can a responder know for sure that it's working? Cracks in concrete and dents in grating can offer a "path of least resistance" to spilled liquids.

An opaque spill response drain cover will not allow a visual inspection of whether or not spilled liquids are finding ways around the protection. The Ultra-Drain Seal, Clear Model changes that.