Specification Grade Silicones

AMS Silicone Solid Sheet and Uncured Silicone

ElastaPro offers AMS silicone in solid sheets and uncured silicone compounds. These elastomers meet Aerospace Material Specifications (AMS) from SAE International and are made to strict quality control standards.

What are AMS Standards?

AMS, or Aerospace Material Specifications, are a set of standards developed by SAE International specifically for materials used in aerospace and defense applications. These standards ensure that materials meet precise criteria for composition, mechanical properties, and performance under various environmental conditions. AMS specifications cover a wide range of materials, including metals, alloys, composites, and plastics.

  • Purpose: AMS standards aim to ensure the reliability and safety of aerospace vehicles by specifying the characteristics of materials used in their construction.
  • Scope: They cover a broad range of materials, including stainless steel, aluminum, and other alloys, as well as composites and plastics.
  • Content: AMS specifications detail requirements for chemical composition, mechanical properties (like tensile strength and hardness), heat treatment, and other physical characteristics.
  • Examples: Specific AMS numbers might indicate the type of material (e.g., stainless steel), its intended use (e.g., corrosion-resistant), and its specific properties.

AMS standards are crucial for aerospace manufacturers because they provide a common language and a set of requirements for materials, ensuring consistency and reliability in the industry.

What are the Advantages of AMS Silicones?

AMS silicone products are manufactured to deliver consistent quality and high reliability. They offer:

  • Resistance to extreme temperatures, from high heat to freezing conditions.
  • Durability against environmental factors such as UV exposure, ozone, and moisture.
  • Flexibility and resilience, reducing material fatigue over time.
  • Compliance with aerospace-grade specifications, ensuring industry-standard performance.

What are AMS Silicone Solid Sheets?

AMS solid silicone sheeting is manufactured to meet strict aerospace standards and arrives ready for die-cutting. It is available in thicknesses ranging from .010” to .500” and in widths of up to 60”. This material is designed for applications requiring high heat resistance, flexibility, and long-term durability.

Manufacturers and engineers rely on AMS silicone sheets for their ability to maintain performance under extreme temperatures. The material resists aging, weathering, and compression sets, making it an excellent choice for seals, gaskets, and insulation components used in high-stress environments.

What is AMS Silicone Uncured Compound?

AMS silicone uncured compound supports molding, extrusion, or calendering to create precision components that meet specific performance requirements. This silicone is delivered in an uncured state and is engineered for processing flexibility, ensuring it meets the exact needs of a given application.

Which AMS Silicones does ElastaPro Make?

ElastaPro’s AMS specification grade silicone materials meet the following AMS specifications:

  • AMS 3301
  • AMS 3302
  • AMS 3303
  • AMS 3304
  • AMS 3315
  • AMS 3325
  • AMS 3326
  • AMS 3327
  • AMS 3332
  • AMS 3334
  • AMS 3335
  • AMS 3336
  • AMS 3337
  • AMS 3338
  • AMS 3345
  • AMS 3348
  • AMS 3349
  • AMS 3356
  • AMS 3357

AMS 3301 Silicone

AMS 3301 silicone meets an AMS standard for a general-purpose, solid silicone rubber with a 40-durometer Shore A hardness. AMS 3301 defines the required properties for silicone in various forms like sheets, strips, tubing, extrusions, and molded shapes. Materials are suitable for applications operating between -85°F to 400°F (-65°C to 204°C) and is resistant to weathering and petroleum-based lubricating oils.

Key characteristics of AMS 3301 silicone:

  • Material Type: Solid Silicone Rubber (MQ/VMQ)
  • Hardness: 40 durometer (35-45 range)
  • Forms: Sheets, strips, tubing, extrusions, and molded shapes
  • Temperature Range: -85°F to 400°F (-65°C to 204°C)
  • Resistances: Weathering, petroleum-based lubricating oils

AMS 3302 Silicone

AMS 3302 silicone meets an AMS standard for a general-purpose, heat- and weather-resistant solid silicone rubber with a 50 durometer (Shore A hardness). This material is designed for applications requiring temperature resistance between -65°F and +401°F (-54°C to +205°C). It also provides resistance to weathering and petroleum-based oils. AMS 3302 silicone is used in aerospace and industrial equipment for seals and other components that need to withstand harsh conditions.

Key characteristics of AMS 3302 silicone:

  • Material: Solid silicone rubber, 100% virgin silicone (MQ/VMQ) elastomer.
  • Hardness: 50 durometer (±5 durometer), Shore A.
  • Temperature Range: Suitable for use from -65°F to +401°F (-54°C to +205°C).
  • Resistance: Good resistance to weathering, ozone, sunlight, oxidation, and petroleum-based lubricating oils.
  • Limitations: Not recommended for contact with gasoline, aromatic fuels, or other low-aniline-point fluids due to excessive swelling.

AMS 3303 Silicone

AMS 3303 silicone meets an AMS standard for a general-purpose silicone rubber with a Shore A hardness of 60 durometer. AMS 3303 covers the requirements for silicone rubber in the form of sheets, strips, tubing, extrusions, and molded shapes that are suitable for use from -65°F to 400°F (-54°C to 205°C) and are resistant to weathering and petroleum-based lubricating oils.

Key characteristics of AMS 3303 silicone:

  • Material: Solid silicone (MQ/VMQ) rubber.
  • Hardness: 60 durometer (a range of 55-65 durometer is covered).
  • Forms: Supplied as sheets, strips, tubing, extrusions, or molded shapes.
  • Temperature Range: Effective in temperatures from -65°F to 400°F (-54°C to 205°C).
  • Resistances: Good resistance to heat, weathering, ozone, and petroleum-based lubricating oils.
  • Limitations: Not suitable for contact with gasoline or aromatic fuels due to potential swelling. Also has poor abrasion resistance and low strength.

AMS 3304 Silicone

AMS 3304 silicone meets an AMS standard for a general-purpose solid silicone rubber with a Shore A hardness of 70 durometer. AMS 3304 specifies a silicone elastomer with a wide operating temperature range, typically from -85°F to 400°F (-65°C to 204°C). It includes resistance to weathering and petroleum-based lubricating oils.

Key characteristics of AMS 3304 silicone rubber:

  • Hardness: 70 durometer Shore A.
  • Temperature Resistance: Operates across a broad temperature range, from approximately -85°F (-65°C) to 400°F (204°C).
  • Chemical Resistance: Resistant to weathering and petroleum-based lubricating oils. It is not recommended for contact with gasoline or other high-aromatic fuels due to excessive swelling.
  • Material: A solid silicone rubber (VMQ elastomer).
  • Forms: Supplied in sheets, strips, tubing, extrusions, and molded shapes.

AMS 3315 Silicone

AMS 3315 silicone rubber meets an AMS standard for a silicone (VMQ) rubber sheet reinforced with glass cloth. It is designed for seals and applications requiring a thin, nonporous, resilient material that can withstand temperatures from -67°F to +401°F (-55°C to +205°C). The glass fabric reinforcement adds strength, making it resistant to weathering and petroleum-based lubricants, though it’s not ideal for contact with gasoline due to potential swelling.

Key Characteristics of AMS 3315 silicone rubber:

  • Material: Silicone (VMQ) rubber.
  • Reinforcement: Glass cloth.
  • Form: Available as a sheet.
  • Temperature Range: -67°F to +401°F (-55°C to +205°C).
  • Properties: Thin, resilient, nonporous, and resistant to weathering and petroleum-based lubricating oils.

AMS 3325 Fluorosilicone

AMS 3325 fluorosilicone meets an AMS standard for a Fluorosilicone (FVMQ) rubber that is resistant to fuel and oils, and is available in a Type A hardness of 55-65 durometer. AMS 3325 covers the material in the form of sheets, strips, tubing, extrusions, and molded shapes for use in applications like fuel systems and lubrication; however, it is not intended for applications like molded O-rings or compression seals.

Key Characteristics of AMS 3325 fluorosilicone:

  •  Material: Fluorosilicone rubber (FVMQ)
  • Resistance: Fuel and oil resistant
  • Hardness: Type ‘A’ hardness, 55-65 durometer
  • Forms: Sheets, strips, tubing, extrusions, and molded shapes
  • Applications: Used in fuel systems and for parts exposed to lubricating oils
  • What it is Not for: Molded rings, Compression seals, Molded O-ring cord, and Molded-in-place gaskets for aeronautical and aerospace uses.

AMS 3326 Fluorosilicone

AMS3326 fluorosilicone meets an AMS standard for fuel- and oil-resistant fluorosilicone rubber within a specific hardness range of 50-65 durometers (Shore A). Note that AMS 3326 specification has been superseded and its requirements are now incorporated into the newer AMS 3325 standard.

Key Characteristics of AMS 3326 fluorosilicone:

  • Purpose: Defines the properties of a specific type of fluorosilicone rubber designed to withstand fuels and oils.
  • Material Type: Fluorosilicone rubber (FVMQ).
  • Hardness: The specification indicates a hardness range of 50-65 durometers on the Shore A scale.
  • Application: Used for various parts in the aerospace sector, including gasketing, sealing, and extruded shapes.
  • Superseded: While AMS3326 remains a recognized standard, its requirements have been integrated into the updated AMS3325 specification.

AMS 3327 Fluorosilicone

AMS 3327 fluorosilicone meets an AMS standard for a fluorosilicone (FVMQ) rubber elastomer designed for high-temperature applications in fuel systems and lubricants, and that offers excellent resistance to fuels and oils. AMS 3327 fluorosilicone is available in a 70-80 Shore A durometer and is used in aerospace as well as military and automotive applications for products like gaskets and seals that require durability in demanding chemical environments.

Key characteristics of AMS 3327 fluorosilicone:

  • Chemical Resistance: Superior resistance to fuels, oils, and non-polar solvents.
  • High-Temperature Performance: Capable of functioning in extreme temperatures found in aerospace and automotive systems.
  • Material Form: Available as solid sheets and strips, and can be molded into various shapes.
  • Durometer: Specified to have a hardness range of 70-80 Shore A.

 AMS 3332 Silicone

AMS 3332 silicone meets an AMS standard for a Methyl Phenyl Vinyl Silicone Rubber (PVMQ) elastomer that is extreme low-temperature resistant, and that has a 15-30 Type A hardness. AMS 3332 silicones are used in aerospace and aviation as well as cryogenic systems and arctic operations where a material must remain flexible at extremely low temperatures.

Key characteristics of AMS 3332 silicone:

  • Material Type: Phenylsilicone (PVMQ).
  • Key Property: Extreme low-temperature resistance.
  • Hardness: 15-30 Shore A.
  • Forms: Available in sheets, strips, extrusions, and molded shapes.

AMS 3334 Silicone

AMS 3334 silicone meets an AMS standard for extreme low-temperature resistance. AMS 3334 specifies a material with a hardness of 35-45 durometer (Type A) and is used in applications requiring reliable performance in very cold environments, such as in aerospace or cryogenic systems.

Key characteristics of AMS 3334 silicone:

  • Material: Silicone rubber (MQ/VMQ/PVMQ).
  • Key Property: Extreme low-temperature resistance.
  • Hardness: 35-45 durometer (Type A).
  • Forms: Available as sheet, strip, tubing, extrusions, and molded shapes.

AMS 3335 Silicone

AMS 3335 silicone meets and AMS standard for a silicone with extreme low temperature resistance that has a durometer of 45-55 Shore A. AMS 3335 defines the physical and performance characteristics for silicone rubber intended for applications requiring flexibility and durability at very cold temperatures, often found in aerospace and other high-performance industries.

Key Characteristics of AMS 3335 silicone rubber:

  • Material: Silicone rubber.
  • Temperature Resistance: Designed to be resistant to extreme low temperatures.
  • Hardness: Falls within the 45-55 Shore A durometer range, indicating it is a moderately soft but durable silicone.
  • Applications: Used in sectors such as aerospace, where seals and gaskets for doors, windows, and engines need to maintain their integrity in cold environments.

AMS 3336 Silicone

AMS 3336 silicone meets an AMS standard for a silicone (PVMQ) that provides extreme low-temperature resistance. AMS 3336 covers the material’s properties and suitability for various forms, ensuring it performs reliably in cold environments and other demanding conditions.

Key characteristics of AMS 3336 silicone:

  • Material: It is a silicone rubber, specifically Polydimethylsiloxane (PVMQ), known for its excellent temperature range and flexibility.
  • Performance: The standard defines a material that is resistant to extreme low temperatures, maintaining flexibility and durability in cold conditions.
  • Application: It is used in applications requiring materials that can withstand both high and very low temperatures, as well as environmental factors like UV, ozone, and moisture.
  • Forms: The specification applies to silicone rubber in various forms, including solid sheets, strips, and extruded or molded products.
  • Industry: As a SAE Aerospace Material Specification (AMS), it is primarily used in the aerospace industry but also serves other high-performance applications.

AMS 3337 Silicone

AMS 3337 silicone meets an AMS standard for a Phenyl-Methyl Vinyl Silicone (PVMQ) designed for extreme low-temperature resistance, with a hardness range of 65-75 Shore A. This material is used in the aerospace and industrial sectors for applications that require flexibility and durability in very cold environments.

Key Characteristics of AMS 3337 silicone:

  • Type: PVMQ silicone rubber, a type of silicone modified with phenyl groups to improve low-temperature performance.
  • Hardness: The specification defines a hardness range of 65-75 Shore A.
  • Forms: Available as sheet, strip, tubing, extrusions, and molded shapes.
  • Performance: It maintains flexibility and functional properties at extremely low temperatures, as well as offering resistance to environmental factors like UV and ozone.

AMS 3338 Silicone

AMS 3338 silicone meets an AMS standard for an extreme-low-temperature resistant silicone rubber (PVMQ) for applications requiring high performance in harsh, cold environments. AMS 3338 defines requirements for the material to ensure it can withstand severe conditions, including the low temperatures and pressures encountered in aviation, defense, and other high-reliability applications.

Key characteristics of AMS 3338 silicone:

  • Material: Silicone rubber (specifically PVMQ, or poly(vinyl methyl siloxane)).
  • Property: Extreme low-temperature resistance.
  • Application: Aerospace and defense industries, where materials must perform reliably in extreme conditions.
  • Purpose: Used for seals, electrical insulation, and other components in aircraft, weapon systems, and communications equipment.

AMS 3345 Silicone

AMS 3345 silicone meets an AMS standard for a high-strength, methyl phenyl vinyl silicone (PVMQ) rubber used in low-temperature and aircraft piston engine oil environments. AMS 3345 specifies a 50 durometer (45-55 range) hardness and provides properties for the material in forms like sheet, strip, tubing, and molded shapes. This material is able to remain flexible across a wide temperature range, from -130°F to 401°F (-90°C to 205°C).

Key characteristics of AMS 3345 silicone:

  • Material Type: Methyl Phenyl Vinyl Silicone (PVMQ).
  • Hardness: 50 durometer, with a range of 45-55 durometer shore A.
  • Temperature Resistance: Remains flexible and functional from -130°F to 401°F (-90°C to 205°C).
  • Specialized Resistance: Specifically designed to resist weathering and the oils found in aircraft piston engines.
  • High Strength: Features high tensile strength, tear resistance, and elongation for use in demanding applications.
  • Forms: Covers silicone in the form of sheet, strip, tubing, molded shapes, and extrusions.

AMS 3348 Silicone

AMS 3348 silicone meets an AMS standard for high-strength, high-resiliency 30 durometer silicone rubber in the form of sheets, strips, tubing, extrusions, and molded shapes. It applies to seals and gaskets used in demanding aerospace applications, requiring a high tensile strength of 1150 psi (7.93 MPa). This material is resistant to weathering and petroleum-based lubricants but is not recommended for use with gasoline due to potential swelling.

Key characteristics of AMS 3348 silicone:

  • Material Type: Silicone (VMQ) rubber.
  • Tensile Strength: 1150 psi (7.93 MPa).
  • Hardness (Durometer): 30 Shore A.
  • Resiliency: High.
  • Forms: Available in sheet, strip, tubing, extrusions, and molded shapes.
  • Resistance: Resistant to weathering and petroleum-based oils.
  • Limitations: Not recommended for contact with gasoline due to swelling.

AMS 3349 Silicone

AMS 3349 silicone meets an AMS standard for a high-resiliency, 70 durometer silicone rubber with a minimum tensile strength of 1100 psi for applications requiring excellent strength, heat resistance, and durability. AMS 3349 dictates the material properties for silicone rubber in various forms, including sheets, tubing, extrusions, and molded shapes.

Key characteristics of AMS 3349 silicone:

  • Hardness: 70 durometer on the Shore A scale.
  • Tensile Strength: A minimum of 1100 psi (7.58 MPa).
  • High Resiliency: Engineered for high strength and resistance to compression set.
  • Operating Temperature Range: Suitable for temperatures from -103°F to +401°F (-75°C to +205°C).
  • Chemical Resistance: Resistant to weathering and aircraft piston engine oil.
  • Forms: Available as solid sheeting, strip, tubing, extrusions, and molded shapes.

AMS 3356 Silicone

AMS 3356 silicone meets an AMS standard for a VMQ silicone that resists lubricating oils and has low compression set. It is used for aircraft parts, particularly in piston engine applications and other aerospace seals and gaskets, due to its ability to maintain flexibility and sealing properties across a wide temperature range.

Key Characteristics of AMS 3356 silicone:

  • Silicone Rubber (VMQ): The base material is a type of silicone, specifically methyl vinyl silicone (VMQ) rubber.
  • Lubricating Oil Resistance: It is compounded to withstand exposure to high-aniline-point petroleum-based oils, which is critical for many engine applications.
  • Low Compression Set: The material is designed to resist permanent deformation after being compressed, which is essential for maintaining seals and gaskets over time.
  • Electrical Grade: It has controlled dielectric properties, making it suitable for electrical applications within the aircraft.
  • Temperature Range: AMS 3356 materials are formulated for use in a broad temperature range, typically from -55°C to +230°C (-67°F to +446°F).

AMS 3357 Silicone

AMS 3357 silicone meets and AMS standard for a silicone rubber (VMQ) elastomer designed to be resistant to aircraft piston engine lubricating oils and have good compression set resistance, with a hardness range of 65-75 Durometer Type A. This aerospace-grade specification applies to silicone material used for various products including solid sheets, strips, tubing, extrusions, and molded shapes, and requires compliance with demanding industry standards for performance and reliability.

Key Characteristics of AMS 3357 silicone:

  • Material: Silicone Rubber (VMQ)
  • Resistance: Resists aircraft piston engine lubricating oils
  • Hardness: 65-75 Durometer Type A
  • Specification: Covers a range of products including sheets, strips, tubing, extrusions, and molded forms.

AMS Silicone Applications

AMS-compliant silicone is used in aerospace, industrial, military, and electrical applications where durability and heat resistance are essential.

Aerospace Applications

In aerospace, it is commonly found in door and window seals to prevent air leakage and protect against moisture and UV exposure. Firewall gaskets use it to shield components from extreme heat, while landing gear seals rely on its ability to withstand pressure changes and hydraulic fluids. It is also used in engine and exhaust system seals, where resistance to high temperatures and chemical exposure is critical.

Industrial Applications

For industrial equipment, AMS silicone is used in ovens and furnaces as a sealing material that can withstand prolonged high temperatures. In chemical processing, it serves as a protective barrier against aggressive chemicals. HVAC systems use it in ductwork and insulation to improve efficiency, while pumps and valves depend on it to maintain reliable sealing under demanding conditions.

Military and Defense

In military and defense applications, AMS silicone is used in vehicle and aircraft seals to provide protection against harsh environmental conditions, including extreme temperatures, pressure changes, and exposure to fuels and lubricants. It is also applied in weapon systems and communications equipment, where consistent performance is necessary for reliability in the field.

Electronics

Electrical insulation is another key use, as AMS silicone protects sensitive electronics from temperature fluctuations, moisture, and environmental exposure. It is found in wire and cable coatings, circuit board protection, and high-voltage insulation, ensuring stable operation in both commercial and defense-related applications.

High-Performance Silicone Starts Here

Feel free to reach out to us for AMS silicone solutions. Whether you need solid sheets for die-cutting or uncured compounds for custom processing, we have the right material for your needs. Contact us today for a quote or to discuss your project with our team.