About Us



We believe in developing partnerships with our customers and suppliers that are based on open and honest communication, mutually-beneficial economics, and integrity in every transaction.

We believe in helping our customers solve problems through innovative designs, cost-effective manufacture, and Industry-leading quality and customer service.

Our management mantra of "More, Better, Faster, Cheaper" (MBFC) guides our team of professionals to continuous improvement in every aspect of Thermoseal's operation.

Not a week goes by where Thermoseal does not refine a business or manufacturing process to improve our quality, productivity, cost or service for our customers.



Thermoseal Glass Corporation was founded in 1956 by Ira Fine, and his brother-in-law, Irving Newman at its present location in Gloucester City, New Jersey, across the Delaware River from Center City Philadelphia, Pennsylvania. Always trying to build a better unit, in 1975, Irv Newman received the company's first patent for an electrically-energized glass panel and circuit breaker combination. With the help of Ira's business acumen and Irv's inventive spirit, these two entrepreneurs grew Thermoseal from a small glass insulator to a company that produced more than 200,000 insulating Glass units per year.

We now have a brand-new facility in Irving, TX. The new facility is our largest Insulated Glass production plant. Which allows us to streamline and expand manufacturing to meet the demand for high-quality insulated glass doors and frames while also allowing for shorter lead times.