When re-installing the plugs, a couple wraps of regular teflon tape will work just fine, then snug the plug. The sealer used by Ford on these just makes installation easier on the assembly line.
2016 Ford Fusion SE (1.5L Ecoboost)
2015 Ford F-150 Lariat Supercrew (3.5L Ecoboost)
2010 Lincoln MKZ (3.5L DOHC)
2007 Ford Focus SE (2.0L DOHC) A.K.A. "Zippy"
2004 Ford Freestar Limited (4.2L OHV)
Generac 17.5KW Generator (33HP Twin Cylinder)
Farm Hand 60 Gallon Compressor (3 Cylinder)
AMSOIL in everything I own that I can get it in...
"Have a good day, and a better one tomorrow"