Understanding the ZZ-R-765/A-A-59588 grade silicone can help you produce silicone products that meet the diverse needs of different customers, thereby expanding the market and customer base.
This article will provide a detailed introduction to the advantages and applications of the ZZ-R-765/A-A-59588 grade solid silicone, offering a comprehensive guide for your business.
What Is ZZ-R-765/A-A-59588 Grade Solid Silicone?
ZZ-R-765/A-A-59588 grade solid silicone is a specification-grade silicone material and you can apply it to various industrial and commercial designs. This silicone is renowned for its durability, flexibility and resistance to extreme temperatures.
Therefore, the ZZ-R-765/A-A-59588 grade solid silicone is highly suitable for use in various harsh environments.
ZZ-R-765 Grade
ZZ-R-765 is actually an old standard that covers three classes of silicone, namely low-temperature resistant, high-temperature resistant and tear-resistant. It was distributed by US Military Specs/Standards/Handbooks in 1991.
You might still come across some silicone products with the label “ZZ-R-765”, but this standard was replaced in 2001. This was based on earlier standards provided by the military procurement authorities of NATO countries to ensure standardization.
A-A-59588 Grade
A-A-59588 replaced ZZ-R-765 in 2001 and is a specification of the United States General Services Administration (GSA). Unlike ZZ-R-765, A-A-59588 classifies silicone into three classes. You may notice that each class has different grades, which is part of the specification. Their grades are determined according to the Shore A hardness.
These silicone materials can be applied to aircraft components such as seals, gaskets, boots
tubing and cushions due to their high-temperature resistance, low-temperature resistance, tear resistance, and resistance to repeated flexing. The following table shows the classification of different classes. You can refer to it.
| Class | Feature Description | Grade (Shore A) |
| Class 1A | Extreme Low Temperature Resistance | 40, 50, 60, 70, 80 |
| Class 1B | Extreme Low Temperature Resistance and Low Compression Set at High Temperature | 40, 50, 60, 70, 80 |
| Class 2A | Extreme High Temperature Resistance | 25, 40, 50, 60, 70, 80 |
| Class 2B | Extreme High Temperature Resistance and Low Compression Set | 25, 40, 50, 60, 70, 80 |
| Class 3A | Extreme Low Temperature Resistance, Tear Resistance and Flex Resistance | 30, 50, 60 |
| Class 3B | Tear Resistance and Flex Resistance | 30, 50, 60, 70, 80 |
3 Core Advantages of ZZ-R-765/A-A-59588 Grade Solid Silicone
We have compiled the property parameters of the ZZ-R-765/A-A-59588 grade solid silicone for you. You can refer to the following table:
| Class | Minimum Tensile Strength | Minimum Elongation | Maximum Compression Set | Test Standards |
| Class 1A | 3.45 – 4.83 MPa (500 – 700 psi) | 125% – 250% | 35% – 45% | ASTM D2240, D412, D395 |
| Class 1B | 3.45 – 4.83 MPa (500 – 700 psi) | 125% – 250% | 35% – 45% | ASTM D2240, D412, D395 |
| Class 2A | 4.48 – 4.83 MPa (650 – 700 psi) | 100% – 400% | 35% – 45% | ASTM D2240, D412, D395 |
| Class 2B | 4.48 – 4.83 MPa (650 – 700 psi) | 60% – 400% | 25% – 30% | ASTM D2240, D412, D395 |
| Class 3A | 5.86 – 8.28 MPa (850 – 1,200 psi) | 400% – 500% | 40% | ASTM D2240, D412, D395, D624 |
| Class 3B | 5.52 – 8.28 MPa (800 – 1,200 psi) | 200% – 500% | 20% – 40% | ASTM D2240, D412, D395, D624 |
Tips: Due to the differences in the formulas, you will find that the performance parameters provided by different suppliers may vary slightly. This is normal. When you make a purchase, you should still rely on the actual data.
Sealing Performance
You place the sealing piece in extreme working conditions of high temperature and high pressure for a long time. If the silicone can recover most of its original thickness after prolonged compression, without collapsing or being unable to reset, it indicates that the sealing performance of this sealing piece is good.
And the compression set of the silicone is closely related to this. Therefore, a low compression set is an important reason for the excellent sealing performance of the silicone.
If you plan to use ZZ-R-765/A-A-59588 grade solid silicone as the silicone sealant, we recommend choosing Class 2B. Its compression set is relatively low, which can more effectively prevent potential problems such as oil leakage and air leakage during the operation of the equipment.
Environmental Resistance
The ZZ-R-765/A-A-59588 solid silicone has excellent temperature resistance. However, there are some differences in its high-temperature and low-temperature resistance properties for different classes.
For instance, Class 1A, Class 1B, Class 3A and Class 3B are all resistant to low temperatures, ranging from approximately -75°C (-103°F) to -70°C (-94°F). While Class 1A, Class 1B, Class 2A and Class 2B are resistant to high temperatures, they meet the high-temperature test condition of 219°C (425°F) specified in the standard.
Your silicone rubber will not harden or crack in a low-temperature environment, nor will it soften or deform under high-temperature conditions. Therefore, whether you are adapting it for high-altitude cold conditions or high-temperature applications in the engine compartment, you can use this silicone to maintain the stability of the material’s various properties.
Authority and Traceability
Since A-A-59588 is a federal specification issued by GSA, if you choose solid silicone that complies with this standard, it means that your production materials have been included in the official NSN procurement catalogue. This is very important for your future participation in various audits and verifications in military and aerospace projects.
The ZZ-R-765/A-A-59588 grade solid silicone usually provides a complete batch traceability report and product qualification certificate. This not only meets the qualification review requirements for your high-end projects, but also ensures the quality of your products, allowing the entire supply quality to be traceable.
Applications of ZZ-R-765/A-A-59588 Grade Solid Silicone
ZZ-R-765/A-A-59588 grade solid silicone not only can be applied in high-end fields such as aerospace, but also has wide applications. No matter which industry you are in, you can use it to improve the quality of your products and brand positioning.
Automotive
In the automotive field, the compliant ZZ-R-765/A-A-59588 grade solid silicone can meet the qualification review requirements for your commercial vehicles and special vehicles. It is also suitable for the following applications:
- Sealing gaskets: such as engine gaskets, valve seals and O-rings. ZZ-R-765/A-A-59588 grade solid silicone has high-temperature resistance and is suitable for engines, providing a stable sealing effect to prevent engine leakage risks.
- Damping function: The flexibility of silicone effectively reduces the vibration of automotive components and reduces noise.
- All-weather sealing: Mainly used for door and window sealing, it has excellent wind and rain resistance.
Aerospace
If you want to enter the aerospace field, compared to other common silicone materials, the ZZ-R-765/A-A-59588 grade solid silicone is more suitable for you. Standard silicone usually has complete batch traceability documents that can pass the aerospace project review.
- High-temperature resistant insulation: It can be used to make insulation blankets and shields to protect the precise components of the aircraft from extreme temperatures.
- High-end sealing: It is used for core sealing points to prevent fuel and air leakage.
- External protective cover: Due to the high-altitude environment being vulnerable to ultraviolet radiation, ozone and other environmental factors, it can protect sensitive equipment.
Electrical and Electronics
ZZ-R-765/A-A-59588 grade silicone is a very good insulating material, and thus it is widely used in the electrical and electronic fields.
- Insulator: It can provide insulation protection for various electrical components and offer a reliable insulation barrier for various electrical components, effectively avoiding the risk of leakage and ensuring the safety and stable performance of the equipment.
- Gaskets and seals: They can be used in the casing of electronic devices to prevent dust, water vapor and other impurities from entering and damaging the circuit.
- Wire harness protective covers: They can reduce cable wear. Moreover, silicone has chemical resistance and can withstand chemical corrosion, extending the service life of the wire harness.
Medical and Food Industry
In the medical and food industries, you will find that medical equipment undergoes high-temperature sterilization, and food processing also requires heat-stable materials. Therefore, some A-A-59588 compliant silicone may also be formulated for medical applications if they additionally meet relevant biocompatibility requirements.
- Medical devices: It is applicable to tubing, seals, and gaskets and other medical accessories, but it needs to pass additional medical-grade silicone-related certifications.
- Food processing: The silicone needs to comply with FDA standards and can be used to make gaskets and seals in food-grade processing equipment.
Manufacturing
The manufacturing sector also extensively uses ZZ-R-765/A-A-59588 grade silicone products.
- General sealing: It can provide high-performance sealing solutions for various industrial machinery and equipment, suitable for various harsh production conditions.
- Vibration and noise reduction: It is used in industrial vibration pads and vibration isolation brackets, which can optimize the industrial environment.
- Protective covers: They can effectively isolate temperature differences, ozone, and dust, protecting sensitive equipment.
Marine
- Marine sealing gaskets: The ZZ-R-765/A-A-59588 grade solid silicone, which is also suitable for marine environments, has a material that is resistant to swelling and UV radiation, maintaining stable performance.
- All-weather sealing: Installed at the positions of ship cabin hatches and hull doors, it can prevent wind and rain from entering the cabin.
Construction
- Expansion joint sealant strip: Preformed sealing profiles and compression seals used in certain building expansion joint systems. You can apply A-A-59588 grade solid silicone, especially Class 3A and Class 3B to the application. The Class 3 series can not only accommodate structural displacement but also seal against wind and rain.
- External wall sealing: Due to its resistance to sun exposure and rain, as well as its anti-aging and weathering properties, it is suitable for sealing applications on the exterior walls of buildings.
Consumer Products
Although A-A-59588 is a performance specification widely referenced in military, aerospace and industrial procurement, if you want to enhance the quality of consumer products and build a good reputation, you can also use this type of silicone.
- Household appliances: It can be used to manufacture sealing rings and gaskets for household appliances such as refrigerators and washing machines, and it is also resistant to high and low temperatures as well as pressure.
- Sports equipment: Due to its flexibility and durability, it can be applied in protective pads and sports equipment.
FAQ
What Are the Core Differences Between Class 2A and Class 2B of A-A-59588 Grade Silicone?
Both of these grades of silicone have high-temperature resistance. The main difference lies in the difference of compressive permanent deformation. Class 2B has a lower requirement for compressive permanent deformation.
Therefore, Class 2A is more suitable for static sealing applications, while Class 2B is more suitable for applications such as O-rings and flange gaskets that require long-term maintenance of sealing pressure.
Is A-A-59588 Silicone Suitable for Dynamic Sealing or Static Sealing?
Class 1 and Class 2 are suitable for static seals, such as cabin door seals or gaskets. For specific applications, you can choose based on the temperature resistance requirements. Because Class 3A and Class 3B have good tear resistance and flex resistance, they are more suitable for dynamic seal applications in moving parts and vibrating environments.
Can A-A-59588 Silicone Be Used as a Substitute If Customers Require ZZ-R-765?
It is generally acceptable. Because A-A-59588 is the officially designated alternative to the ZZ-R-765 standard, and is accepted as an equivalent material in the vast majority of cases.
Besides COA, What Documents Should the Supplier Provide When Purchasing A-A-59588 Silicone?
Professional suppliers not only provide COA (Certificate of Analysis), but also offer the actual performance data of this batch, such as hardness, tensile strength and compression set, etc.
Does Silicone Material Complying with A-A-59588 Necessarily Meet ZZ-R-765 at the Same Time?
Theoretically, A-A-59588 is the new standard replacing ZZ-R-765, and it is generally compliant. However, there are slight differences in specific parameters. A-A-59588 has adjusted the requirements for the tear strength and flex resistance of the silicone.
Final Thoughts
Legensilico is a silicone manufacturer in China with over 20 years of experience. We can provide you with a wide range of high-quality silicone products. We also offer customization services. If you have any ideas about colors or specifications for customization, please feel free to contact us for cooperation.
