
Develops and manufactures PE foam insulation and pre-insulated piping systems for heating, cooling and water distribution.

Thermaflex International Holding bv
Waalwijk (NL)New on Amplifa
About Thermaflex
Thermaflex is a manufacturer of technical insulation and pre-insulated piping systems based in Waalwijk, Netherlands. The company produces PE foam insulation for pipes, ducts and equipment in heating, cooling, refrigeration and HVAC/R applications, as well as pre-insulated PB-1 piping systems (Flexalen) for district heating, district cooling and drinking water networks. Further product lines include pre-insulated ventilation ducts (TQ-Air), marine insulation (ThermaSmart Marine) and protective profiles made of recyclable PE foam for packaging. Manufacturing comprises direct extrusion of polyethylene foam and pipe pre-insulation as a contract service. In addition, Thermaflex offers engineering support from product selection through network design to thermal optimization, co-development of customized solutions and installation training. The products are Cradle to Cradle Certified®, recyclable and backed by EPD data; customers come from construction, the energy transition/DHC, shipbuilding, industry, infrastructure and data centers in more than 45 countries.
- Site
- NS Waalwijk
- Processes
- Direct extrusion of polyethylene foam (PE foam insulation), Manufacture of pre-insulated piping systems (Flexalen pre-insulated piping), Pipe pre-insulation service (Pipe Pre-Insulation Service as contract manufacturing), Pre-insulated ventilation ducts (TQ-Air pre-insulated ducting), Co-development of customized insulation and piping solutions, Engineering support: product selection, network design, thermal optimization, Installation training for insulation and piping systems, Engineering and support (product selection, network design, thermal optimization)
- Materials
- Polyethylene foam (PE), Polybutene-1 (PB-1), PU foam (polyurethane, Flexalen PU), Polyethylene foam, PU foam (Flexalen PU)
- Certificates
- ISO 9001, Cradle to Cradle Certified®
- Founded
- 1976
- Employees
- 201-500 (cited
- Industries
- Construction (new build/renovation), District heating/cooling & energy transition, OEM equipment manufacturers, Packaging, Marine/shipbuilding & offshore, Infrastructure
- 01
Direct extrusion of PE foam
- 02
Manufacture of insulated pipes and profiles
- 03
Pre-insulation of PB-1 pipes (Flexalen)
- 04
Manufacture of pre-insulated duct (TQ-Air)
- 05
Engineering & Support
- 06
Installation training
Materials & Processes
Polyethylene foam
Directly extruded foam for pipe, duct and equipment insulation as well as protective profiles.
Polybutene-1 (PB-1)
Carrier pipe material of the pre-insulated Flexalen systems for district heating, cooling and drinking water.
PU foam (Flexalen PU)
Insulation core of the Flexalen pre-insulated piping systems.
Locations

Waalwijk
NLHeadquarters and manufacturing
- Materials
- PE foam, PB-1, PU foam
Products & Components




Inside the production


Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Direct extrusion of polyethylene foam (PE foam insulation)Plastics | – | – | – | – | Polyethylene (PE) |
| Manufacture of pre-insulated piping systems (Flexalen pre-insulated piping)Plastics | – | – | – | – | PB-1 (polybutene-1), Polyethylene (PE), PU foam |
| Pipe pre-insulation service (Pipe Pre-Insulation Service as contract manufacturing)Plastics | – | – | – | – | PB-1 (polybutene-1) |
| Pre-insulated ventilation ducts (TQ-Air pre-insulated ducting)Plastics | – | – | – | – | Polyethylene (PE) |
| Co-development of customized insulation and piping solutionsEngineering | – | – | – | – | – |
| Engineering support: product selection, network design, thermal optimizationEngineering | – | – | – | – | – |
| Installation training for insulation and piping systemsAssembly | – | – | – | – | – |
Additional services
Reference customers
Quality
Thermaflex operates ISO 9001-certified quality management systems within a QHSE framework (Quality, Health, Safety, Environment) and pursues continuous improvement, scrap reduction and circular economy. EPDs and lifecycle assessments are published for key products.
| Evidence | Waalwijk |
|---|---|
| ISO 9001 | |
| Cradle to Cradle Certified® |
History
- 1976
Founded in Waalwijk, Netherlands; start of direct PE foam extrusion, introduction of the zip-up insulated pipe Ultra M
- 1976–1980er
Development of PE foam insulation technology, introduction of Ultra M
- 1990er–2000e
Pioneer of the Flexalen pre-insulated PB-1 piping systems, introduction of Flexalen® 600, first company worldwide with completely (H)CFC-free production
- 2010er
Received Cradle to Cradle Certified® status, integration of sustainability into product lines with EPDs
- 2020er
Introduction of ThermaSmart® Marine, Flexalen® heat pump solutions and the Flexalen® plug-and-play short-length solution
- 2023
Launch of ESG reporting, strengthening of circular economy principles
- 2026
50th anniversary, focus on innovation, sustainability and partnership