74-451-178 - Goodrich Deice Shinemaster Polish Cosmetic Coating

74-451-178 – Goodrich Deice Shinemaster Polish Cosmetic Coating

Available now on the Airparts.aero Marketplace.

Overview

The Goodrich 74-451-178, correctly known as Shinemaster No. 3 Edge Sealer, is a flight-critical, electrically conductive cement, not a cosmetic polish. This specialized compound is engineered for a vital application: sealing the trimmed edges of pneumatic de-ice boots after installation or repair. Manufactured by B.F. Goodrich (now part of Collins Aerospace), its primary function is twofold: to create a durable, waterproof seal over the exposed fabric layers of the boot and to restore the conductive surface across the trimmed edge. This ensures the boot can properly dissipate static electricity, preventing radio interference and protecting sensitive avionics.

Key Features

• Electrically Conductive Formula: Impregnated with conductive particles (such as silver or carbon). This feature is essential for restoring the electrical path across the trimmed edges of the boot, allowing precipitation static (P-static) to be safely channeled to the airframe ground.
• Moisture-Proof Edge Sealing: Acts as a powerful rubber cement that hermetically seals the exposed, porous fabric layers of a trimmed de-ice boot. This prevents moisture, de-icing fluid, and rain from wicking into the boot's structure, which would cause delamination and catastrophic failure.
• Excellent Adhesion: Specifically formulated to bond tenaciously to the rubber and fabric compounds of pneumatic de-ice boots, creating a durable and flexible edge that resists peeling and cracking.
• Abrasion Resistance: Cures to a tough, resilient finish that protects the vulnerable trimmed edges of the boot from erosion caused by rain, ice, and airborne particulates.
• OEM Specification: As the genuine OEM compound from the de-ice boot manufacturer, it guarantees the correct conductivity, sealing properties, and chemical compatibility required for an airworthy repair.

Technical Specifications

• Part Number: 74-451-178
• Product Name: Shinemaster No. 3 Conductive Edge Sealer
• Component Type: Electrically Conductive Sealing Cement
• Material: Solvent-Based, Conductive Polymer Compound
• Color: Black
• Application: Brush-on application to the trimmed edges of pneumatic de-ice boots.
• Cure Time: Air-cures to a durable, flexible seal.
• Certification: Conforms to original B.F. Goodrich / Collins Aerospace specifications.

Aircraft Compatibility

The 74-451-178 is a universal maintenance chemical required for the proper installation and repair of pneumatic de-ice boots on any aircraft equipped with them.

• Common Aircraft Platforms:
  • Textron Aviation: Beechcraft King Air, Cessna Citation series
  • Piper: Cheyenne, Navajo, Seneca
  • Pilatus: PC-12
  • De Havilland: DHC-6 Twin Otter
  • And a vast range of other turboprop and piston aircraft equipped for flight into known icing (FIKI).

Applications

The 74-451-178 is a mandatory material for specific, flight-critical maintenance tasks:

• New De-Ice Boot Installation: Applied to all trimmed edges of a new boot during installation on the wing or tail leading edges.
• De-Ice Boot Repair: Used to seal the edges of a patch or repair area in accordance with the component maintenance manual.
• Preventative Maintenance: Re-application may be required if the original sealer is found to be peeling or eroded during detailed inspections.

Why Choose 74-451-178?

An improperly sealed de-ice boot is a ticking clock to failure. Moisture ingress will cause the boot to delaminate and shed from the aircraft, rendering the ice protection system inoperative. Furthermore, a break in the conductive surface can lead to severe radio interference from P-static buildup. The Goodrich 74-451-178 is the only engineered solution that addresses both of these critical safety issues simultaneously. For any de-ice boot installation or repair, using the specified OEM conductive edge sealer is absolutely essential for a safe and airworthy outcome.

Order Your 74-451-178 Edge Sealer Now

Ensure the longevity and electrical integrity of your aircraft's ice protection system with genuine OEM materials. Visit Airparts.aero to order your Goodrich 74-451-178 conductive edge sealer today.

The 74-451-178 sealer is a critical component in mitigating the effects of Precipitation Static (P-static). As an aircraft flies through clouds, rain, or dust, friction causes a massive static electrical charge to build up on the airframe. The outer layer of a de-ice boot is impregnated with conductive material to allow this charge to flow safely to static wicks for discharge. When a boot is trimmed to fit a wing, this conductive path is broken. The 74-451-178 sealer acts as a "jumper," containing conductive particles that bridge the gap and restore the conductive path along the trimmed edge. Without this conductive path, the static charge can build to thousands of volts and then discharge as a powerful spark to a nearby conductive fastener or structure, creating significant radio and navigation system interference.

Note: This is a specialized chemical compound. It is flammable and should be used with adequate ventilation. Application must be performed by a certified A&P mechanic in strict accordance with the instructions in the current aircraft or component maintenance manual. The surface must be properly prepared and cleaned before application.