Thermostat and Distillation

IGI Waxes for Thermal Applications
IGI can modify and optimize the expansion characteristics of waxes as they transition from the solid to liquid phase.  The transition can be controlled to precise and narrow melting points.

Thermostat Waxes

Astorstat® is the world’s premier brand of wax for thermal actuation and thermostatic control devices used in a variety of high-performance and precision applications. These include automobile, marine, and aerospace engines; and home heating and cooling systems. Astorstat® wax technology has also been expanded for use in cosmetics, toners for digital printing, and a host of other applications, which require very precise and narrow melting materials.

Astorstat® waxes are recognized for their:

  • High quality and consistency
  • Durability and longevity even under difficult operating conditions
  • Customized characteristics uniquely fabricated to meet the exacting requirements of each customer and their specific device design and application
  • Narrow melting range to deliver greater precision

Astorstat® – Customized High Performance Solutions

The beauty of Astorstat wax technology is its simplicity. The principle of capturing the work done as a substance expands is well-established. The ability to perform work repeatedly, at a specified temperature, without loss of performance is the novelty.

The most well known application of Astorstat waxes is the standard automotive thermostat installed in every vehicle’s cylinder block. Each thermostat contains a plug or pellet of wax, designed to melt at a particular temperature or over a specific temperature range. On melting, the volume expansion in the enclosed system works against and finally overcomes the spring loaded seal, effectively introducing coolant into the engine and regulating operating temperature. Astorstat distilled waxes have successfully passed thousands of expansion-cycles without suffering any critical property degradation.

With an increasing focus on environmentally-friendly performance, engines are being designed to operate at elevated temperatures to optimize efficiency and reduce harmful emissions. Further attention is now being focused on very high temperature (>220°F) waxes and a line of Astorstat products operating up to 300°F. These materials find use in the manufacture of automatic valves, catalytic converters and in heat sinks for aerospace, rocketry, munitions and robotics.

The Astorstat product line also includes a comprehensive selection of waxes operating at low (80°F – 120°F) and mid-range (120°F – 160°F) temperatures which are designed for use as in ambient temperature control systems, automatic windows, roof vents and thermal protection devices. There are several new applications that utilize the narrow-melting/congealing temperature properties, chemical inertness and compatibility of Astorstat waxes with other materials. These uses include high-spec hot melt adhesives, toners, packaging applications and cosmetics.

Listed below are some of the products offered for thermostat wax applications. Keep in mind many applications will require more specialized versions. It is the flexibility and expertise in wax design coupled with application and production know-how which allows IGI to custom manufacture products to your individual specifications. Please contact us so we may review your application together to find the optimal product type.

Astorstat® - Product Selection Guide
ProductCongealingStart toTerminalVolume ofTravel
PointOpen PointPointExpansion
(ASTM D938)(Astor® DST-007)(Astor DST-007)(Astor DST-007)(Astor DST-007)
Low Operating Temperature Range
Astorstat HA1617.8 - 18.9°C17.8 - 18.9°C23.4 - 24.5°C14 - 18%5.88 - 6.89 mm
64 - 66°F64 - 66°F74 - 76°F0.23 - 0.27 in
Astorstat HA1827.2 - 28.3°C27.2 - 28.3°C32.8 - 33.9°C14 - 18%5.88 - 6.89 mm
81 - 83°F81 - 83°F91 - 93°F0.23 - 0.27 in
Astorstat HA2036.7 - 37.8°C36.7 - 37.8°C42.3 - 43.4°C16 - 20%6.37 - 7.41 mm
98 - 100°F98 - 100°F108 - 110°F0.25 - 0.29 in
Mid Operating Temperature Range
Astorstat 7580.1 - 81.2°C74.5 - 75.6°C85.6 - 86.7°C14 - 16%5.88 - 6.37 mm
176 - 178°F166 - 168°F186 - 188°F0.23 - 0.25 in
Astorstat 8085.1 - 86.2°C79.5 - 80.5°C90.6 - 91.7°C14 - 16%5.88 - 6.37 mm
185 - 187°F175 - 177°F195 - 197°F0.23 - 0.25 in
Astorstat 9095.1 - 96.2°C89.5 - 90.6°C100.6 - 101.7°C14 - 16%5.88 - 6.37 mm
203 - 205°F193 - 195°F213 - 215°F0.23 - 0.25 in
Astorstat 95100 - 101.2°C89.0 - 90.1°C105.6 - 106.8°C14 - 16%5.88 - 6.37 mm
212 - 214°F192 - 194°F222 - 224°F0.23 - 0.25 in
High Operating Temperature Range
Astorstat 110124 - 129.5°C*107.3 - 112.9°C126.8 - 132.3°C16 - 18%6.37 - 6.89 mm
255 - 265°F225 - 235°F260 - 270°F0.25 - 0.27 in
Astorstat 100105.1 - 106.2°C**98.4 - 100.0°C114.5 - 116.2°C14 - 16%5.88 - 6.37 mm
221 - 223°F209 - 212°F238 - 241°F0.23 - 0.25 in
Astorstat 105109 - 110.6°C**104 - 105.6°C125.7 - 127.9°C15 - 17%6.13 - 6.63 mm
228 - 231°F219 - 222°F258 - 262°F0.24 - 0.26 in
*Indicates Mettler drop pt. **Indicates Modified D938. ( ) Indicates test method.
The above is a representative, but not complete list of Astorstat waxes. Furthermore, we can manufacture distilled waxes to customer specifications and request all customers to consult with our sales and technical service personnel before making a product selection.
*also available meeting NSF STATUS: Standard 14 certification under PPI-TR3

IGI is the world leader in waxes for thermostat applications

Repeatable, dependable performance

IGI’s proprietary process ensures consistent performance in a customer’s application

Product expertise

IGI’s product specialists can guide you to the optimal product needed.

Talk to an IGI Wax Expert

Call 1-800-561-3509