What effect will torn wifi/BT antenna ribbon have?

I'm transplanting the wifi/BT antenna to another rear case. A couple things happened during the removal.

1. I tore the ribbon. As you look at the antenna in it's normal orientation, the tear starts halfway down on the right side at the fold/crease. It goes about 1/2 way to the left towards the rectangular hole.

2. What is the silvery, spongey material on the ribbon? iFixit has the area outlined in their parts list, iPhone 5s Bluetooth and Wi-Fi Antenna.

3. Half of the gold gasket broke completely off.

Will the tear or the broken gasket have any affect on the part functioning properly?

If I opt to just replace it, is that silvery, spongey stuff necessary for the part to function properly?

The red line is where I tore it.

The yellow square is the material I'm referring to. I picked at it and pulled some of it off.

The blue circle is the gasket that got torn in half.

I'm figuring it all has something to do with something so I ended up getting a replacement part. Still curious to know what effect, if any, these things may have.

Thanks!