Pentalift, a Buffalo, New York, based manufacturer of dock and warehouse equipment, recently unveiled a new type of dock door that can prevent rain from entering into the dock area. The RS800 RainStop seal uses a stiffly sprung 5.5-inch foam filled header curtain to create a positive seal on the top of the trailer. The seal also diverts water from the top of the trailer so that it flows way from the building. The seal is available both as a retrofit for existing dock doors or as part of new construction.