About Us


The SealCore Story

In 2006, while working in the commercial tenant finish-out industry, Chuck Longhenry realized there had to be a better, faster, and less intrusive way to seal the core and penetration holes that typically contain electrical and data wires in multi-story buildings. After two years of trial and error, he perfected and applied for a patent on the SealCore Safety Plate. This high quality, inexpensive, and fire-proof product is revolutionizing the way core holes are sealed in multi-storied buildings, both during construction and in post-construction projects.

In order to manufacture and market the SealCore Safety Plate, Chuck founded Longhenry Industries, Inc., of which he is the president. The company is located in Aubrey, Texas just 45 minutes from the Dallas-Ft. Worth metroplex area.

SealCore Safety Plates are proudly made in the USA using local workers.


Recent Testimonial


I wanted to write you a letter and tell you how great the Device was that sealed the floor where we had an existing 4” core hole thru the floor. The device was extremely easy to install and it only took about 30 seconds to install it. The design is perfect, it is flush with the floor, it is fire rated and carpet will go over the top of it and not be noticed.

Peyton Treadwell

Project Manager Gentzler Electric

More Testimonials