Dock Seals are vinyl-wrapped foam pads/cushions that the semi-trailer compresses into when it backs in and comes to rest against the dock bumpers, which forms a seal around three-sides of the trailer. Typically, dock seals provide the tightest seal for a relatively low price, but they can become worn easily at loading docks that receive heavy traffic. Dock seals are best when there are only small variations in the size and style of trailers at the dock.
Dock Shelters are larger enclosures that seal around the perimeter of the trailer, forming a seal. This works by applying pressure against the sides of the trailer with vinyl fabric curtains, internally fitted with fiberglass stays. They accomodate larger dock door openings and service all varieties of trailer heights/styles while being subjected to less daily wear and tear - since they aren’t intended to be compressed into by the trailer. They also allow for full, unobstructed access to loads on the trailer for maximum loading and unloading efficiency. The up and down trailer movements during loading will not cause premature wear, when contrasted with dock seals.