The lubricant and sealant used in aerospace applications need to operate reliably for a long time under extreme conditions (such as high vacuum, wide temperature range, strong radiation, microgravity, etc.). Their technical requirements cover multiple dimensions including material properties, environmental adaptability, sealing efficiency, and system compatibility. The main technical requirements for aerospace lubricant and sealant are as follows:
Core performance requirements
Wide temperature operating capability:
Typical operating temperature range is -80°C to +180°C, and some products can reach a short-term peak of +220°C or higher.
It must maintain fluidity and smooth startup at low temperatures and not separate oil, drip, or char at high temperatures.
Very low volatility and outgassing rate:
The outgassing rate in vacuum environment should be lower than 1×10⁻⁷ g/cm²·s.
Outgassing performance should comply with NASA ASTM E595 or ECSS-Q-ST-70-02C standards, with a total mass loss (TML) of ≤ 0.4% and a condensable volatile matter (CVCM) of ≤ 0.04%.
Radiation resistance and resistance to atomic oxygen erosion:
It must have a performance attenuation of less than 8% after 10⁸ rad γ-ray irradiation. In low-orbit environments, it needs to resist atomic oxygen ablation (exposure dose up to 5×10²⁰ atoms/cm²), with an extremely low mass loss rate. High extreme pressure and anti-wear performance: Four-ball machine extreme pressure value (PB) ≥ 750–800 N, and the wear mark diameter (PD) ≤ 0.48 mm. Excellent compatibility: Highly compatible with aerospace common materials such as fluororubber (FKM), silicone rubber (SiR), PTFE, aluminum/titanium alloys, and stainless steel, without swelling or corrosion.
Special requirements for sealing systems
Leakage control: The leakage rate of the sealing system should be ≤ 10⁻⁶ Pa·m³/s.
Static seals (such as gaskets, O-rings) require high flatness of the sealing surface; dynamic seals (such as oil seals, mechanical seals) need to balance low friction and wear. Long life and maintenance-free: The design life is usually required to be 10–20 years or more than 15 years in orbit without maintenance. Mechanical stability (such as 100,000 times shear) change rate ≤ 8%. Anti-pollution ability: It must not contaminate sensitive components such as optical payloads and solar panels, and requires low atomization and low particle excretion.
Requirements corresponding to typical application scenarios
Application scenarios Key technical requirements
Satellite structure – -80°C to +180°C, anti-atomic oxygen, 15-year life, low outgassing
Aerospace engine: Temperature ≥ 200°C, high viscosity index, compatible with rubber seals
Hydraulic/pneumatic system: Synthetic oil, viscosity index ≥ 100, oxidation resistance
Metal sealing ring (deep space): Can withstand -269°C to +3000°C, transient alternating, anti-NTO/MMH corrosion.
The LubeSeal brand 404EU deepwater high-temperature high-pressure lubricant and sealant is a universal lubricant and sealant product suitable for working conditions requiring the best lubrication effect. The manufacturing process and formulation of the LubeSeal brand 404EU deepwater high-temperature high-pressure lubricant and sealant make it have diversified universal performance that other conventional similar products do not have. The LubeSeal brand 404EU deepwater high-temperature high-pressure lubricant and sealant can be used on brass, aluminum, copper, stainless steel and conventional steel threads. The LubeSeal brand 404EU deepwater high-temperature high-pressure lubricant and sealant is formulated with LIQUILON, thus being unaffected by acidic, oily, corrosive agents and conventional solvents. The LubeSeal brand 404EU deepwater high-temperature high-pressure lubricant and sealant can be used in working conditions with temperatures higher than >400°F (>204°C) and pressures higher than 10,000 psi. The LubeSeal brand 404EU deepwater high-temperature high-pressure lubricant and sealant can provide long-term continuous protection for painted components, keeping equipment in excellent working condition. The LubeSeal brand 404EU deepwater high-temperature high-pressure lubricant and sealant is recommended for equipment requiring long-term continuous lubrication and equipment where downtime is not allowed. The LubeSeal brand 404EU deepwater high-temperature high-pressure lubricant and sealant will reduce equipment wear and its unique sealing characteristics will prevent the loss of lubrication properties. The LubeSeal brand 404EU deepwater high-temperature high-pressure lubricant and sealant has a unique coating and painting performance, enabling it to produce a residual film lubrication layer, which can effectively avoid metal surface contact and prevent rust and corrosion.
The application scope of the LubeSeal brand 404EU deepwater high-temperature high-pressure lubricant and sealant is wide. It can be specifically applied to threaded joints, gaskets, gearboxes, gears, chain drive units, pneumatic winches, rotary drive units, outdoor motors, switches, wellheads, rotary joints, universal joints, pumps and valve packing, as well as truck tail ends, etc.
Product features and advantages:
※ Universal type ※ Maintains flexibility even after long-term use
※ Resistant to hydrogen sulfide ※ Suitable for oily threads
※ Reduces friction ※ Seals leakage areas
※ Reduces wear ※ Applicable to working conditions with temperatures above 400°F (204°C) and pressures greater than 10,000 psi
※ Shelf life: Two years (2026-05-14)
