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've been in the construction industries for 30 years and this device is great! We do tenant finish outs in a lot of high-rise and mid-rise buildings and have always dreaded filling in abandoned poke thru holes... no more going beneath the slabs and into another tenants space, no more mixing concrete and no more mess.... 35 seconds and i walk away! This device is a definite must have for any job!

Joe Erlich

ForemanCommanche Builders, Elgin, Oklahoma

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