Is Frost King Made in USA?
Last verified: April 2026 · Based on 4 verified products and public manufacturing evidence
Yes — Made in USA
Frost King manufactures its products in the United States — specifically in Elizabeth, NJ. Our verification team confirmed this through public manufacturing claims, factory records, and product listings.
Verification Confidence
Average confidence score across 4 verified products — scores ≥70% are shown on this site.
Manufacturing Details
- Made in
- Elizabeth, NJ
- Headquarters
- Elizabeth, NJ
- Location detail
- Specific city confirmed
- History
- Long-established (50+ years)
- Founded
- 1920
Verification Evidence
Frost King is the brand of Thermwell Products Co. in Elizabeth, New Jersey. Nation's #1 and most trusted brand of packaged weatherstripping with 2,000+ products made in New Jersey since 1955.
About Frost King
Frost King has been manufacturing weatherstripping, insulation, and home energy-saving products in Mahwah, New Jersey since 1920, providing American homeowners with the sealing and insulation products that keep homes comfortable and energy-efficient.
A Century of Home Weatherproofing
Frost King is a brand of Thermwell Products, which has manufactured home weatherization products in Mahwah, New Jersey since 1920. For over a century, Frost King has supplied American homeowners with the weatherstripping, door sweeps, pipe insulation, and window film that prevent energy waste and protect against cold drafts.
Mahwah, in Bergen County, New Jersey, has been Thermwell's manufacturing home through the entire history of modern American home construction. The company's products have been part of American home maintenance through the post-war housing boom, the energy crisis of the 1970s, and today's focus on energy efficiency.
Made in New Jersey
Frost King's weatherstripping and insulation products are made at the Mahwah facility using foam, rubber, and vinyl materials designed for the specific temperature ranges and moisture conditions of American climates. The foam rubber door and window weatherstripping is die-cut and packaged in New Jersey; the pipe insulation is extruded and cut domestically.
For homeowners doing their own energy improvements, Frost King represents the most accessible entry point — products available at every hardware store in America, made domestically by a company that has been solving American home weatherization problems for over 100 years.
American-Made Frost King Products
USA Verified
USA Verified
Frequently Asked Questions
Is Frost King made in the USA?
Yes. Frost King is made in the United States, manufactured in Elizabeth, NJ. Frost King is the brand of Thermwell Products Co. in Elizabeth, New Jersey. Nation's #1 and most trusted brand of packaged weatherstripping with 2,000+ products made in New Jersey since 1955.
Where is Frost King manufactured?
Frost King manufactures its products in Elizabeth, NJ. The company is headquartered in Elizabeth, NJ.
Which Frost King products are made in the USA?
We carry 4 verified American-made Frost King products across Tools & Hardware. Every listing is linked directly to Amazon with verified manufacturing evidence.