I’m done running wires through the firewall (I hope), so I sealed up the pass-throughs. The wires are wrapped tightly with some silicone impregnated fiberglass and then wrapped that with silicone tape. The silicone impregnated fiberglass sleeve is then slid over the whole mess and squeezed tight with the worm clamps. The back one tightens against the flange and the front one tightens against the wires. This is the one on the right side of the firewall.
And here’s the one on the left side of the firewall.
