Front Disc Brake Slide Pins - Question

[fourbangingfun]

Hey everyone.

So today I pulled apart the front brakes on my 07 sedan. It has 170k miles, and the rotors/pads were replace at 100k miles. The bottom slide pin was frozen in place on the right front wheel. I was able to pull it out, clean it on a wheel brush, lube with anti-seize and reinstall.

My question is this: that lower pin had a rubber ring around it towards the end of the pin. It was all chewed up and destroyed. I ended up just pulling it off (along with the one on the opposite side) and installing the pin without the rubber ring.

Will this cause any problems? I don't really see what the purpose of that rubber ring is, as the hole for the slide pin has a dead end at the bottom of it.

Thanks