Dock Seal with Light-blocking Header


Frommelt Products Corporation has introduced the Insulator Dock Seal with Light-blocking Header, the most durable dock seal  available and the first one with a header that effectively seals small light gaps caused by trailer protrusions.  Motivated by stricter regulations and tougher inspections, companies are seeking dock seals that can block small gaps of daylight which indicate openings for the entry of dust, bugs and other contaminants into a facility. 

The seal at the top of a trailer provided by a dock seal header can be broken by door latches and other protrusions at the top rear of the trailer, resulting in air gaps. Insulator’s proprietary light-blocking header design features rows of layered, horizontal pleats that conform around these protrusions as the trailer backs in, improving the sealing efficiency and minimizing the daylight that causes red flags during inspections.  The Insulator Dock Seal design is also comprised of exclusive features that protect against extreme wear and tear, lengthening the life of the seal. For example, all trailer and forklift contact surfaces are reinforced with high-strength Durathon™ fabric over a flexible vinyl base fabric for extreme wear resistance. Durathon’s pebble-grained coating creates a friction-resistant surface that trailers slide against rather than abrade. 

 The Insulator’s corners are heavily reinforced with layers of Durathon fabric and flexible high-molecular weight polyethylene (HMWPE) sheeting for resistance to damage, and these components are attached with industrial Velcro for easy replacement and low-cost maintenance. In addition, the Insulator head pad’s unique backerless construction frees it from the wall, allowing it to move with the trailer to reduce friction and wear, and also pivots to prevent yard jockey “pop-off.” 


  • effectively seals small light gaps
  • corners are heavily reinforced 

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