Dock Seals & Shelters

A dock seal uses foam pads that the trailer compresses against, giving the tightest seal when your trailers are a consistent size — but it can obstruct the top of the opening. A dock shelter uses flexible curtains or a frame that the trailer backs into, accommodating a wider range of trailer heights and widths and keeping the full opening clear. Alliance helps you pick based on your trailer mix and opening — call (240) 269-2216.

Cold storage docks benefit most from inflatable seals, which expand around the trailer for the tightest possible close and minimal air infiltration, often paired with high-speed insulated doors and air barriers. This combination holds temperature, controls condensation and ice, and helps pass food-safety inspection. Alliance designs complete climate-controlled dock packages nationwide.

Yes — an unsealed dock opening is one of the largest sources of conditioned-air loss in a warehouse. A properly sized seal or shelter dramatically reduces the gap around the trailer, cutting heating and cooling load, reducing drafts for workers, and keeping weather and pests out. The energy savings often pay back the investment, especially on conditioned buildings. Alliance sizes and installs dock seals and shelters nationwide.

Yes — seals and shelters are commonly retrofitted onto existing dock positions. We measure each opening and your trailer dimensions, recommend the right product, and install it without disrupting the rest of your operation. Worn seals and torn shelter curtains can also be replaced individually. Alliance retrofits and replaces dock seals nationwide.

Sizing depends on the dock opening dimensions, the dock bumper projection, and the range of trailer heights and widths you service. Too small and the seal leaks or wears fast; too tight and trailers snag it. Alliance field-measures the opening and reviews your trailer fleet so the seal or shelter fits and lasts.

Service life depends on traffic and trailer alignment, but foam seals and shelter curtains are wear items that eventually compress or tear. Many are repairable or have replaceable pleats and curtains rather than requiring a full replacement. Alliance carries replacement components for the major brands and can assess yours during a service visit nationwide.