PWA Silicone
Engineered for extreme thermal, mechanical, and environmental performance, ElastaPro PWA silicones meet strict Pratt & Whitney specification requirements for military, commercial, and industrial aerospace applications. Manufactured in the USA at our AS9100D and ISO 9001:2015 certified facility, our PWA-grade solid silicone sheets, continuous rolls, and uncured compounds provide reliable sealing in high-stress jet engine and aerospace environments.
Pratt & Whitney Specification Grade Silicone Rubber
Pratt & Whitney (an RTX business) sets rigorous materials standards for turbine engines, defense propulsion systems, and auxiliary power units (APUs). Elastomers specified for PWA compliance must demonstrate long-term thermal stability, low compression set under high bolt torque, and strict adherence to physical property tolerances (tensile strength, elongation, and tear resistance).
ElastaPro supplies specification-grade PWA silicone rubber in both cured solid silicone sheeting (ready for die cutting, flash cutting, and waterjet converting) and uncured silicone compounds (ideal for molding, extruding, or calendering custom aerospace seals).
Available Product Formats & Configurations
| Format | Thickness / Size Range | Durometer (Shore A) | Primary Conversion / Usage |
|---|---|---|---|
| Solid Silicone Sheets | 0.010″ to 0.500″ (0.25 mm to 12.7 mm) | 30 to 80 Shore A | Precision Gaskets, Thermal Shields, Die-Cutting |
| Continuous Rolls | 36″, 48″, and custom widths up to 60″ | 40 to 70 Shore A | Automated Gasket Converting, Roll-to-Roll Stamping |
| Uncured Silicone Compound | Custom Batch Sizes / Continuous Pig-Slabs | Engineered to Target Spec | Compression Molding, Extrusion, Custom Seals |
Key Performance Advantages of ElastaPro PWA Silicone
- Extreme Thermal Range: Performs reliably in continuous operating temperatures from -80°F to +500°F (-62°C to +260°C), with intermittent excursions to higher temperatures.
- Low Compression Set: Maintains tight sealing force over thousands of hours, preventing fluid, air, or hot gas bypass in high-vibration aerospace assemblies.
- Ozone & Environmental Resistance: Exceptional resistance to UV exposure, ambient ozone, weather degradation, and thermal aging.
- Strict Quality & Traceability: Manufactured under AS9100D & ISO 9001:2015 quality standards in Santa Fe Springs, CA, with complete batch traceability and Certificates of Analysis (COA).
- Custom Colors & PSA Options: Standard red/orange, black, and gray shades, available with factory-laminated pressure-sensitive adhesive (PSA) backings for quick assembly.
Complementary Aerospace & Defense Specifications
In addition to meeting PWA internal callouts, ElastaPro manufactures high-performance aerospace silicones compliant with cross-referenced military and aerospace standards often required on Pratt & Whitney part drawings:
- A-A-59588 (AA-59588): Classes 1A, 1B, 2A, 2B, 3A, and 3B general-purpose and extreme-temperature silicone.
- AMS Specifications: AMS 3301, AMS 3302, AMS 3303, AMS 3304, AMS 3305, and high-strength AMS 3357.
- MIL-DTL-25988 / AMSR-25988: Fluorosilicone elastomers for applications requiring resistance to jet fuels, hydraulic fluids, and synthetic lubricants.
- ASTM E595: Low outgassing silicone options for vacuum and high-altitude aerospace optics or electronics enclosures.
Frequently Asked Questions About PWA Silicone
What does PWA stand for in aerospace silicone specifications?
In military and commercial aerospace manufacturing, PWA refers to Pratt & Whitney Approved specifications. These technical specifications define the mechanical, thermal, and chemical requirements for silicone elastomers used in aircraft engines, nacelles, auxiliary systems, and ground support equipment.
Is PWA silicone available with Pressure Sensitive Adhesive (PSA)?
Yes. ElastaPro supplies PWA-compliant solid silicone sheet rolls with factory-applied heat-stable acrylic or silicone pressure-sensitive adhesive (PSA) backing to streamline die-cutting and peel-and-stick gasket mounting.
Does ElastaPro provide full material certifications for PWA orders?
Yes. Every batch of ElastaPro PWA silicone is shipped with a full Certificate of Analysis (COA) detailing durometer, tensile strength, elongation, tear resistance, and specific gravity to verify complete compliance with specification callouts.
Can PWA silicone be used in applications requiring fluid or fuel resistance?
Standard PWA silicone provides excellent resistance to hot air, ozone, and water, but limited resistance to hydrocarbon fuels or jet fuels. For fuel-exposed environments, ElastaPro supplies PWA-compliant fluorosilicone (FVMQ) materials.
