What Is a Corrosion Inhibitive Sealant? PPG Aerospace Guide

PPG Aerospace® Corrosion Inhibitive Sealant does more than just fill cracks and gaps - it also helps protect your aircraft against the threat of corrosion. Developed as a safer, smarter alternative to other corrosion control methods, PPG Aerospace Corrosion Inhibitive Sealant goes on quickly and starts protecting immediately, while simultaneously protecting the environment. Whether your aircraft is exposed to the elements regularly and requires protection, or if you need to fight off chemical corrosion in a specific area, PPG Aerospace Corrosion Inhibitive Sealant has you (and your aircraft) covered.

One of the most important aspects of aircraft maintenance is using a corrosion inhibitive sealant for protection. Moisture, aviation chemicals and condensation can all cause corrosion on untreated surfaces, leading to structural damage and an endless stream of repairs. Quality corrosion protection is critical to keeping your aircraft in flight-ready condition, without any holes or damage that can cause drag.

The War on Corrosion

Anyone who owns, works on, or flies an aircraft knows they're in a constant battle against corrosion. Corrosion prevention is a multi-billion dollar industry, with the biggest names in aviation trying to get ahead of corrosion before it can ground them. Fortunately, PPG Aerospace has been around for over 50 years and has learned a thing or two about keeping corrosion at bay. As a leader in corrosion protection, PPG Aerospace has developed the future of corrosion protection so you can not only fight the good fight, but win the war on corrosion. Skip the chrome-based corrosion inhibitors you've tried in the past and choose REACH-compliant corrosion inhibitors from PPG Aerospace.

It's important to choose quality, effective corrosion protection for your aircraft. Even a small amount of corrosion on the outside of your aircraft can cause drag, reducing fuel economy and taxing your aircraft's engine. When flying the outside of your aircraft must be as smooth and as aerodynamic as possible. A high-quality corrosion inhibitor can help you achieve and maintain the smooth exterior you need.

The Trusted Choice

PPG Aerospace corrosion inhibitive sealants have been at work longer and on more aerospace applications than any other brand in the world. Pilots, aircraft technicians and aviation enthusiasts everywhere know that PPG Aerospace corrosion inhibitive sealants work. Choose the brand more aviation professionals trust than any other brand by choosing PPG Aerospace. PPG Aerospace is the trusted choice when it comes to protecting sensitive aircraft components from damaging corrosion.

Not only is PPG Aerospace one of the most trusted and reposted brand names in the industry, but they're also one of the most innovative. From their signature corrosion inhibitive sealant line to advanced coating systems, PPG Aerospace is committed to always improving and developing newer and more effective products that guard against corrosion. Using environmentally friendly ingredients, PPG Aerospace products can guard against corrosion while also guarding against environmental damage.

Specialty Sealants from PPG Aerospace

PPG Aerospace offers a wide range of specialty sealants designed to meet the demanding needs of the aviation industry. These solutions address everything from fuel tank sealing and aerodynamic smoothing to windshield and canopy bonding. Among these specialty products, corrosion inhibitive sealants play a critical role in protecting aircraft components from environmental and chemical corrosion.

As part of the trusted PPG DeSoto™ line, corrosion inhibitive sealants are engineered to deliver long-lasting protection in both interior and exterior aircraft applications. These sealants help aircraft maintenance professionals prevent costly structural damage while maintaining compliance with stringent aerospace standards. Whether used on fuselage joints, access panels, or inside fuel tanks, these sealants offer versatile, flight-ready protection as part of PPG's broader portfolio of high-performance aerospace solutions.

Understanding Corrosion Inhibitive Sealants

PPG Aerospace Corrosion inhibitive sealants are designed to act like a sealant, but to also guard against moisture incursion and other causes of corrosion. The sealants act as a physical barrier against corrosion, coating the surface and protecting it against a wide range of hazards.

The ideal corrosion inhibitive sealant would fill cracks and gaps with ease, cure readily under normal conditions and deliver long-lasting protection, flight after flight. The sealant should be able to withstand temperature variations, vibrational forces and other hazards of flight without failing, cracking or drying out. PPG Aerospace corrosion inhibitive sealant does all of those things and does them well, protecting your aircraft flight after flight.

A corrosion inhibitive sealant is commonly used on exterior surfaces of the aircraft, where exposure to moisture and environmental hazards is likely. However, corrosion-inhibitive sealants can also be used inside the aircraft, guarding against corrosion caused by aviation chemicals like jet fuels or gasoline.

Common Types of Corrosion-Inhibiting Sealants

When it comes to corrosion-inhibiting sealants, PPG Aerospace knows that one size does not fit all, which is why they've developed several varieties of sealants to suit your needs. Each type of sealant has different properties that make it ideal for different uses, but all corrosion-inhibiting sealants can stop corrosion in its tracks. Some common types of corrosion-inhibiting sealants include:

• P/S 870 Class A Corrosion Inhibiting Sealant - This brush-grade sealant goes on readily and is ideal for protecting larger surfaces. It has a service temperature range from -65°F (-54°C) to 250°F (121°C) and works on aluminum alloys and dissimilar metals.
• P/S 870 Class B Corrosion Inhibitive Sealant - This thickened sealant is extrusion grade and is ideal for filling larger gaps, cracks and holes. The sealant has a service temperature range from -65°F (-54°C) to 250°F (121°C) and works on a wide range of surfaces, including aluminum alloys and dissimilar metals. It is resistant to aviation gasoline and jet fuel.
• P/S 870 Class C Corrosion Inhibitive Sealant - This roller-grade sealant goes on smooth and forms a lasting barrier against corrosion-causing moisture. The sealant has a service temperature range from -65°F (-54°C) to 250°F (121°C) and works on a wide range of substrates.
• PR-1432-GP Corrosion Inhibitive Coating - Classified as an elastomeric coating, this sealant works on a variety of substrates and has a service temperature range from -65°F (-54°C) to 250°F (121°C). The 2-part compound can be applied by spray or by brush.
• PR-1436-G Sprayable Corrosion Inhibitive Sealant - Designed to be sprayed on, this sealant is ideal for large areas. The 2-part compound has a service temperature range from -65°F (-54°C) to 225°F (107°C) and cures at room temperature.
• PR-1775 Class B Non-Chromate Corrosion Inhibitive Sealant - This sealant acts as an effective barrier against common causes of corrosion, with a wide service temperature range from -65°F (-54°C) to 250°F (121°C). The 2-part formula maintains excellent elastomeric properties, even after exposure to both jet fuel and aviation gas.

Common Aerospace Applications & Custom Sealant Solutions

Corrosion inhibitive sealants are essential across a range of aerospace applications, including fuselage joints, wing overlaps, access panels, fuel tank sealing, windshield and canopy bonding, and aerodynamic smoothing. These sealants help prevent moisture incursion and chemical corrosion, maintaining structural integrity across all aircraft zones. To make applications more efficient, PPG Aerospace also offers customized solutions like Semfoam™ Sealants and Semkit® packages. These innovations simplify preparation, reduce material waste, and allow for faster, cleaner application — ideal for technicians and aerospace maintenance crews who prioritize both quality and efficiency.

Corrosion Inhibitive Sealant FAQs

What types of aerospace sealants does PPG offer?

PPG offers a broad range of aerospace sealants designed for specific applications such as fuel tank sealing, fuselage aerodynamic smoothing, windshield bonding, secondary fuel vapor barriers, and conductive electrically curing sealants. Among these, corrosion inhibitive sealants are a key product category for protecting sensitive aircraft structures.

How do PPG's sealants improve application in aerospace settings?

PPG's aerospace sealants are formulated for easy application, rapid curing, and reduced material waste. Many are available in convenient Semkit® packages and pre-mixed frozen cartridges, helping maintenance teams complete tasks efficiently while maintaining quality and environmental compliance.

What are the different PPG Aerospace sealants available?

PPG offers a variety of aerospace sealants including PR-1782 B-2, PR-1826 B-1/2, and P/S 870 B-2. Each formula is tailored to specific aerospace needs and meets industry standards, such as AMS and MIL specifications. Many fall under the category of corrosion inhibitive sealants, offering long-term protection in high-stress environments.

How long does it take for PPG Aerospace sealants to ship?

Standard lead times for PPG Aerospace sealants typically range from 43 to 46 business days. However, shipping may vary based on order volume, product availability, and packaging type. Contact SkyGeek for the most accurate delivery timelines.

What is CA 1000 and how does it compare?

While CA 1000 is a non-curing, non-chromate corrosion inhibitive compound with a service temperature range up to 275°F (135°C), it differs from the PPG Aerospace corrosion inhibitive sealants featured on this page. CA 1000 offers corrosion protection but is not part of the PPG product line. Users should consult technical data sheets to determine the best fit for their aircraft application.

Conclusion

For corrosion prevention, you can count on, turn to the experts at SkyGeek and get help finding the PPG Aerospace corrosion inhibitive sealant that's right for your needs. We carry a huge selection of PPG Aerospace products including some of their best-selling sealants.