How Labyrinth Seals Control Contaminant Ingression
WEBHow to Protect Stored Gearboxes with Labyrinth Seals. Spray shaft extensions with a suitable dry film or similar preservative. For gearboxes with noncontact labyrinth seals, use internal vaporphase rust protective coating instead of complete oil fill. Both oil wet and nonoil wet surfaces are protected by vaporphase rust inhibitors.