Thermosil Heat-Resistant Silicone Sealants for Jet Engines
Reliable, proven performance. Available for fast delivery. Choose Thermosil; because you do have a choice.

NEW! Thermosil 7005 
Ready-to-use Abradable Sealant

Thermosil 7005 is a low-density, heat-resistant silicone sealant that forms an abradable air seal for high-speed compressor blades in jet aircraft engines. Providing outstanding performance and reliability, while speeding throughput in manufacturing and maintenance applications, Thermosil 7005 offers:

• A one-part formula that is ready-to-use, right from the container; no mixing or degassing required
• Optimum elasticity and sealing at operating temperatures up to 550˚ F
• A securely cross-linked glass-polymer matrix for maximum durability
• No glass agglomerates that can clog turbine vane cooling holes
• Self-leveling characteristics for a uniform finish in deep-section applications
• Safe; no hazardous chemicals or materials (based on environmental risk assessment)

Thermosil 7005 offers sealing solutions for applications where a low density, flexible, machinable, heat-resistant sealant is required. It is available in one-gallon straight-sided pails, one-gallon plastic pails, dispensing gun cartridges, and a range of custom packaging options to meet customer-specific applications.

Thermosil T7000 
Abradable Air Seal

Thermosil T7000 is a two-part, low-density silicone sealant used to create an abradable air seal for high-speed compressor blades in jet engines. T7000 meets Pratt & Whitney specification PWA 407 and is primarily used in operating environments with temperatures up to 525˚F (274˚C). Here are some more performance-proven features:

• High-compression glass microspheres and a proprietary microsphere surface treatment produce a securely cross-linked glass-polymer matrix that will not degrade during aggressive mixing or application, ensuring consistent hardness and durability throughout the product life cycle.

• High-instensity microsphere processing eliminates glass agglomerates that can clog turbine vane cooling holes and cause premature erosion and seal failure.

• T7000 offers outstanding adhesion during application. Cured material will not adhere to turbine blade tips.

• T7000 is low-viscosity and easily degassed for efficient application. It offers a working life of over 24 hours and is fully machinable when cured. Plus, its consistent black color provides a great looking finish.

Thermosil T7000 is available in a 2.74 kg A/B kit, or in pre-measured void-free component injection cartridges.

Thermosil 4000 
​Potting and Damping Compound

Thermosil 4000 is a thixotropic, two-part silicone sealant that is applied as a potting compound for low-pressure compressor stator vanes in jet aircraft engines. Its superior elastic properties also allow it to function as a damping compound to minimize vane vibration and stress. Thermosil 4000 excels in ease of application and applied performance.

• Minimal heat increase during machine mixing allows users to extrude 100% of the cartridge contents for maximum efficiency.

• Fast extrusion rates for easy application, with excellent adhesion and flow-resistance.

• Meets Pratt & Whitney specification PWA 404-2 and is primarily used in operating environments with temperatures up to 350˚F (177˚C).

• Smooth, glossy black finish produces cosmetically superior fillets.

Thermosil 4000 is available in pre-measured void-free component injection cartridges.

To view and download technical data sheets for any of the products on this page, please click here.