Dock seals provide a 90 – 95% seal preventing loss of refrigeration and provide climate control between the building wall and the trailer rear perimeter. If they are in poor condition, they will leak and lose their effectiveness. Southern States Dock & Door installs Perma Tech dock seals. Perma Tech is one of the industry leaders in innovation and design with over 50 years in the industry. Contact us or call 866.350.3593 today for your dock seal needs.