Our Advanced Service doors are designed to meet the most demanding requirements for rolling steel service doors. The StormtiteTM AP Model 627 offers commercial and industrial facility owners the most advanced thermal performance values published by any major U.S. manufacturer of insulated rolling steel doors. The RapidSlat® combines the speed and high cycles of a high performance door with the security and durability of a rolling steel door. Whether your requirements are for durability, thermal performance, security, or speed - we have a door system solution.