Barriers with kiss-offs

A barrier comprising:

• a housing having a front wall and an opposing back wall each extending between opposing sidewalls, the housing also including a floor and an interior surface bounding a chamber, the chamber being adapted to hold a fluid and communicating externally through an inlet opening;
• a first inset projecting into the chamber from the front wall so as to form a recessed blind pocket on the front wall, the first inset having an inside face disposed within the chamber;
• a second inset projecting into the chamber from the back wall so as to form a recessed blind pocket on the back wall, the second inset having an inside face disposed within the chamber, the inside face of the first inset and the inside face of the second inset being directly connected together within the chamber so as to form a kiss-off therebetween;
• and
• a channel disposed within the chamber and bounded between the first inset and the second inset so that the channel is completely encircled by the first inset and the second inset.