The leader in
high-performance thermal insulation
Our thermal insulation materials hold up under the mechanical and thermal loads that heated presses and molds place on insulation over years of continuous cycling. They combine high temperature resistance with low thermal conductivity, and they stay mechanically stable at elevated temperature, including holding parallelism under repeated pressing cycles. We also build in easy machinability, corrosion and chemical resistance, and long-term durability, which keeps the total cost of ownership lower than swapping out insulation that degrades faster under the same conditions.
APPLICATION EXPERTISE
Our thermal insulation materials go into presses and molds across several manufacturing processes, each with different heat and pressure requirements.
PLASTIC INJECTION PRESSES
Thermal insulation for plastic injection molds improves product quality and process reliability while decreases operating costs.
HYDRAULIC TIRE PRESSES
Hydraulic tire presses equipped with insulated, heated platens used to vulcanize car tires, two-wheel tires, and plane tires.
RUBBER INJECTION MOLDS
Heated insulation for injection presses used to manufacture seals, gaskets, membranes, connectors, and parts for medical and domestic applications.
PRECISION 3-D MOLDS
A key component in high-tech molds that require a complete array of thermal insulation installed on end user presses at parts manufacturers.
COMPARING OUR THERMAL INSULATION GRADES
We manufacture several grades of thermal insulation under our Vetrotherm and Pamitherm product lines, each suited to a different combination of operating temperature, flexural strength, and thermal conductivity. Vetrotherm HPL Standard Grade holds 730 MPa flexural strength at up to 280°C with 0.25 W/mK thermal conductivity, while Vetrotherm R offers a more economical HPL option rated to 260°C. Vetrotherm F is our LPL standard grade rated to 230°C, and Vetrotherm S is a high-temperature index laminate rated to 350°C with lower thermal conductivity at 0.22 W/mK. Vetrotherm Light has our lowest thermal conductivity at 0.15 W/mK for applications where minimizing heat transfer matters more than maximum flexural strength. Pamitherm® is our highest operational temperature grade, rated to 600°C, for presses and molds running hotter than standard HPL and LPL laminates can handle.
CORE THERMAL INSULATION PRODUCTS & CHARACTERISTICS
| VRI brand |
Feature | Flexural Strength | Short-term Operational Temperature | Thermal Conductivity |
| VETROTHERM | HPL standard grade | 730 MPa 106 ksi | 280°C 540°F |
|
| VETROTHERM R | Economical HPL grade | 650 MPa 94 ksi | 260°C 500°F | 0.30 W/mK 2.00 BTU in / ft2 hr °F |
| VETROTHERM F | LPL standard grade | 180 MPa 26 ksi | 230°C 450°F | 0.30 W/mK 2.00 BTU in / ft2 hr °F |
| VETROTHERM S | High-temperature index laminate | 180 MPa 26 ksi | 350°C 660°F | 0.22 W/mK 1.50 BTU in / ft2 hr °F |
| VETROTHERM LIGHT | Lowest thermal conductivity | 130 MPa 19 ksi | 230°C 450°F | 0.15 (W/mK) 1.10 BTU in / ft2 hr °F |
| PAMITHERM® | Highest operational temperature | 170 MPa 25 ksi | 600°C 1100°F | 0.18 (W/mK) 1.25 BTU in / ft2 hr °F |
GLOBAL MANUFACTURING & TECHNICAL SUPPORT
We operate manufacturing sites and sales offices in North America, Europe, and Asia, which keeps lead times short regardless of where your press or mold operation is located. Our technical and application teams work with your engineering group to select the right insulation grade for your specific press or mold, backed by our own testing capabilities rather than relying only on published datasheet values. We also handle custom machining, fabrication, flexible conversion, sub-assemblies, and finishing in-house, so insulation components arrive ready to install rather than requiring additional processing on your end.
WHY TRUST VRI COMPOSITES AND THE GUND COMPANY
- Materials designed to meet customers’ most challenging insulation needs
- Widest array of industry leading products
- Global sales offices and manufacturing sites in North America, Europe and Asia to ensure local service and short lead times
- Well-earned reputation for strong materials performance and durability
- Broad technical and application expertise
- Advanced testing capabilities and engineering knowledge
- Extensive capacity for custom machining, fabrication, flexible conversion, sub-assemblies and finishing
FREQUENTLY ASKED QUESTIONS
READY TO GET STARTED?
Ready to source high-performance thermal insulation or get a quote on custom-fabricated components? Our team is ready to review your drawings, specifications, or material requirements.