If you’re careful, you can still reuse them. When I installed my HDK suspension, I had to remove the drivers side head to modify one tube. As expected, the gasket tore but I was too big a cheap *** to buy a new set so I just made sure everything was lined up, reinstalled everything and haven’t had a leak yet after 7k+ miles.My only complaint with Remflex is they are not reusable. They tear up on disassembly. That said, they seal like a ****.