I've had two pumps lock up with what looks like flat plastic threads stuck in the rollers ( I took it apart to see). Is this tank sealer coming off the inside of the tank ? Anyone else seen this ?

Pull the tank and dump it out....see what ya find.

Pulling the tank is quick and easy.
Failing lining is one of the reasons I DON'T suggest putting tank liner into your gas tank.

I'm selling my stock tank....replacing it with a fuel cell...$100 plus shipping if yours is bad...