Chrome-Free Aerospace Sealant Features Lightweight, Corrosion-Inhibiting Properties

PPG offers a chrome-free aerospace sealant designed for aircraft manufacturers and maintenance, repair and overhaul shops requiring corrosion-inhibiting properties.

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PPG offers a chrome-free aerospace sealant designed for aircraft manufacturers and maintenance, repair and overhaul shops requiring corrosion-inhibiting properties. Available in all three classes, PPG’s PRC PR-2870 sealant hits customer’s key requirements for fuselage and pressure sealants, such as rapid cure and light weight characteristics.

PR-2870 sealant for roller application (Class C) is now available with 48-hour application and assembly time for large, complex aircraft structures. Like the other Class C grades, the company says, it cures 70-percent faster than traditional interfay sealants at ambient conditions, minimizing cycle time.

The chrome-free sealant will soon be available for spray application that will enable coverage of wide areas for self-leveling fairing over countersunk fasteners and as a flexible primer under paint in areas such as wheels to protect against stone chip impact.

PPG has qualified PR-2870 sealant in viscosities for application by brush (Class A), extrusion (Class B) and roller (Class C), with half-hour and two-hour work times for Classes A and B and 12-hour and 24-hour options as well as a new 48-hour option for Class C. In addition to complying with EU REACH regulations, PR-2870 sealant is also qualified to U.S. Military Specification MIL-PRF-81733. It is supplied in a two-part SEMKIT package or premixed and frozen cartridge.

A replacement option for Pro-Seal 870 sealant, PR-2870 sealant is designed to inhibit corrosion on metal in aerodynamic smoothing, structural surface sealing, fay sealing and pressure fuselage sealing aircraft applications.

For more information, visit ppgaerospace.com.