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47 Employees of Thermoseal® Industries LLC, Gloucester City to be Laid Off June 30

IMG_3717Thermoseal shipping department 600 Jersey Avenue at 5th Street, Gloucester City (CNBNews photo)

(Gloucester City, NJ)(May 11, 2020)—Senneca Holdings, Fifth Street, and Jersey Avenue, the parent company of Thermoseal® Industries LLC have filed a notice with the State of New Jersey that it will layoff 47 employees at its Gloucester City plant effected June 30. 

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Screen Shot 2020-05-10 at 15.47.39Senneca Holdings Corporate Office located on 5th Street, Gloucester City (CNBNews photo)

Established in 1956, Thermoseal manufactures and sells doors and insulating glass units used as part of the display, reach-in, and walk-in cases and compartments.  Founded by Ira 6a00d8341bf7d953ef0224df359f19200b-320wiFine and his brother-in-law Irving Newman, Thermoseal received its first patent in 1975 for an electrically-energized glass panel and circuit breaker combination. The pair grew the business from a small glass insulator to a company that produced more than 200,000 insulating glass units per year, the Thermoseal® website says.


Since 1956 we have produced in excess of 10 million Insulating Glass (IG) Units to the commercial refrigeration, oven, test laboratory, and architectural markets. We offer a wide range of glass products consisting of insulating glass units for commercial applications, refrigerator doors, heated and high-temperature glass units for specialty cases, viewports, windows, glass, and mirrors!

Themoseal® offers complete design services. As a custom manufacturer, we can accommodate most customer requests, so don’t hesitate to call us with a special request.


For many years the company was known as Thermoseal Glass. It was located on Water Street between 4th and 5th Streets. In 2013-14 they purchased the old Hinde & Dauch Paper Company building (also known as West Virginia Paper & Pulp) at 600 Jersey Avenue. That property extends from 5th Street to Sixth Street and fronts Jersey Avenue. The back of the property faces Water Street.  The large complex has set empty for several decades. In March 2015 Senneca Holdings purchased Thermoseal.

Hinde & Dauch Paper Company, which manufactured corrugated fiber shipping boxes, was a longtime fixture in Gloucester City until it moved south in the late 1960s or early ’70s.  The company came to Gloucester City in 1910 according to the website Old Time Trains (see here).   After the paper company moved, the property became the home of Tyndale Cosco Co., which made vintage mid-century ceramic pottery table lamps and shades. But after a few years, Tyndale closed its’ Gloucester location moved to another location.

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600 JERSEY AVENUE, GLOUCESTER CITY, NJ--One-story, multi-tenant manufacturing and warehouse facility containing a total of approximately 222,166 +/- sq. ft. on 11.59+/- acres, located in the Gloucester City Urban Enterprise Zone. Portions of the building are nearly a century old. The property was acquired by Rick Chubb and Marc Policarpo in 2013 and was in very poor condition. The partners undertook a multi-million-dollar renovation and today the building houses 4 industrial tenants including 170,000+ sq. ft. occupied by Thermoseal Industries. Thermoseal is a division of Senneca Holdings, and a leading manufacturer of insulated windows and doors.  (source Westfield Real Estate )


RELATED: Good News for Gloucester City Residents! 


The WARN information on the New Jersey Department of Labor and Workforce Development website doesn't say whether the job losses are temporary or permanent, according to the trade publication PLASTIC NEWS 

The Thermoseal website says Gloucester City will remain the headquarters for the business but it is moving to a new facility in Irving, Texas, "to streamline and expand manufacturing to meet the demand for high-quality insulated glass doors and frames while also allowing for shorter lead times."

New Jersey Employer Support of the Guard and Reserve (ESGR), a Department of Defense office, announced February 25th, 2015  that Thermoseal Industries LLC was honored with an “Above and Beyond Award” in recognition of extraordinary support of their employees who serve in the New Jersey Guard and Reserve.

RELATED: Thermoseal Honored by DOD for Support of Employees Serving in the Army Reserve

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