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I looking for good ways to protect cables and wiring penetrating the firewall.
The firewall forward installation is complete otherwise and drill access to some
the points is impossible without pulling the mount   :(    I've tried the black
grommets set in with 400 degree silicone and in some cases captured with metal
retaining plates that aircraft spruce sells.  But these require drilling to
fasten the plates.  In other cases I've put an aluminum or plastic tube sheath
around the cable or #4 wire and pushed this through the firewall as a chafe
guard.  To seal this up should I glob on silicone around the bundle or cable (as
I see done on certified airplanes) or should I use 2-part firewall sealant....
I would like to hear what others have done successfully to address chafing and
CO protection.

Thanks in advance,
Ed de Chazal
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Please send your photos and drawings to marvkaye@olsusa.com.
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