What Thermoid makes

Thermoid manufactures industrial rubber products in three families: rubber hose, lightweight conveyor belting, and flexible ducting. The hose line spans air and multipurpose hose, welding hose in Grade R and Grade T, and fuel-delivery hose for petroleum, gas, and LP-gas service, alongside named products such as Valu Flex, Hercules 500 and 1000, Maxecon, Goldenair, Versicon, and the Air Power jackhammer hose. A specialty line includes the Alarm Booster fire-suppression booster hose built to NFPA 1961.

The automotive aftermarket is a distinct division. Thermoid supplies heater and coolant hose, fuel line and PCV hose, air brake hose certified to DOT FMVSS 106 and SAE J1402A, power steering return hose, and transmission oil cooler hose, sold to truck and trailer manufacturers, aftermarket packagers, and wholesalers. The belting side covers lightweight conveyor belts for general industrial, package-handling, incline and impression, and hot-stock service, including USDA and FDA white food-grade belts under names like Griptop, Diamond Incline, and Sani White. Ducting runs from FlexKing, Neoflex, and Silflex industrial ducts to Aeroduct aerospace and ground-support products, including jet-starter hose.

Materials and construction reflect a broad industrial catalog: EPDM, nitrile, neoprene, butyl, and silicone compounds, with polyester and cotton fabric reinforcement and wire-helix ducting. Thermoid sells to end users, OEMs, and industrial distributors serving MRO requirements, across automotive, aviation, agriculture, construction, marine, chemical, food processing, and material-handling markets.

Ownership and history

Thermoid traces its brand to 1883 and its lineage to the Trenton Rubber Corporation, founded in Trenton, New Jersey in 1870. The Bellefontaine, Ohio hose plant was built in 1969 for a patented continuous-cure process, and the Oneida, Tennessee plant came into the group through the 1986 acquisition of B.F. Goodrich Industrial Rubber Products. The company markets itself on more than 140 years of continuous rubber manufacturing.

Thermoid operates as HBD/Thermoid, Inc., a wholly owned subsidiary of HBD Industries, Inc., a privately held middle-market manufacturing group based in Dublin, Ohio. HBD runs several manufacturing platforms beyond rubber, including gearing, electric motors, industrial magnetics, and precision components, under brands such as Winsmith, Perfection Gear, Powertec, Ohio Electric Motors, Ohio Magnetics, and Precision Metal Products. Day-to-day, Duane Cawthon is listed as General Manager of HBD/Thermoid. The group serves aerospace, defense, medical device, and general industrial markets, which gives the Thermoid rubber unit the backing of a diversified parent rather than a single-product independent.

Manufacturing footprint

Thermoid runs three US manufacturing plants. The headquarters and a hose plant sit at 1301 W. Sandusky Avenue in Bellefontaine, Ohio. A second plant operates at 201 N. Allen Avenue in Chanute, Kansas, and a third at 240 Industrial Lane in Oneida, Tennessee. Company materials describe Thermoid products as made in the USA, and the three-plant structure lets the business run hose, belting, and ducting lines across separate sites. Employment across the unit is in the range of roughly 500 to 1,000 people. For buyers weighing nearshoring and domestic-content requirements, the all-US manufacturing base is a relevant sourcing fact.

Certifications and quality

Thermoid states that it maintains ISO 9001 certification across all of its manufacturing facilities. The company does not post a certificate date or registrar on its site, so the claim is reported here as a current, undated quality-system claim rather than a dated certificate. Several product lines carry specific external standards: air brake hose is certified to DOT FMVSS 106 and meets SAE J1402A, fuel line hose is built to SAE 30R6 and 30R7, welding hose follows Grade R and Grade T conventions, and the Alarm Booster fire hose is built to NFPA 1961. Buyers running PPAP or spec-driven qualification should confirm current certificates directly with the plant supplying their part.

Sourcing evidence

US customs records filed under HBD Industries, at the Oneida, Tennessee plant address, show 170 import shipments on record, with the most recent dated August 2026. The named foreign suppliers, including Mehler Engineered Products, Khosla Profil, Kitra Industries, and Rexon Group, are textile and fabric-reinforcement makers rather than finished-goods sellers. That pattern, reinforcement fabric and compounds in, finished hose and belting out, is the signature of a domestic manufacturer rather than a reseller importing complete products.

Coverage caveats apply. These are US ocean-freight bill-of-lading records only. Air, truck, and rail movements do not appear; some records name freight intermediaries rather than manufacturers; and product categories come from declared manifest codes, which are noisy. Detailed shipment-by-quarter trajectory was not available from the free record, so this profile reports activity and recency rather than a growth rate. Absence of a record is not evidence of absence.

Frequently asked questions

What does Thermoid manufacture?

Thermoid manufactures industrial rubber products in three families: rubber hose, lightweight conveyor belting, and flexible ducting. Hose products include air and multipurpose, welding, fuel-delivery, and a full automotive aftermarket line of heater, coolant, fuel, air brake, and power steering hose. It also makes aerospace and ground-support ducting and USDA/FDA food-grade conveyor belts.

Who owns Thermoid?

Thermoid operates as HBD/Thermoid, Inc., a wholly owned subsidiary of HBD Industries, Inc., a privately held middle-market manufacturing group headquartered in Dublin, Ohio. HBD runs multiple manufacturing platforms beyond rubber, including gearing, electric motors, and precision components.

Where is Thermoid located?

Thermoid is headquartered at 1301 W. Sandusky Avenue in Bellefontaine, Ohio, and runs three US manufacturing plants: Bellefontaine, Ohio; Chanute, Kansas; and Oneida, Tennessee. Its products are marketed as made in the USA.

How old is Thermoid?

Thermoid traces its brand to 1883 and its lineage to the Trenton Rubber Corporation, founded in 1870. The company markets more than 140 years of continuous industrial rubber manufacturing. The Bellefontaine hose plant was built in 1969 and the Oneida, Tennessee plant joined the group in 1986.

What certifications does Thermoid hold?

Thermoid states that it maintains ISO 9001 certification across all of its manufacturing facilities. Individual product lines meet specific standards, including DOT FMVSS 106 and SAE J1402A for air brake hose, SAE 30R6 and 30R7 for fuel line, and NFPA 1961 for its Alarm Booster fire hose.

Who are Thermoid's customers?

Thermoid sells to end users, OEMs, and industrial distributors serving MRO needs, rather than publishing a named customer list. Its automotive aftermarket hose is sold to truck and trailer manufacturers, aftermarket packagers, and wholesalers, and its markets span automotive, aviation, agriculture, construction, marine, chemical, and food processing.

Last verified September 28, 2026. Is this your company? Request a correction.