A firewall sealing assembly is provided for use between a firewall and a penetrating member. The assembly comprises a primary seal, a secondary seal, and a plurality of retaining rings. The primary seal is configured to provide a primary seal between the firewall and the penetrating member. The secondary seal is configured to provide a secondary seal between the firewall and the penetrating member. The secondary seal is positioned spaced apart from the primary seal to define a seal cavity there between.