How can damaged labyrinth packing be repaired when replacement is not possible?

Damaged labyrinth packing typically cannot be fully repaired due to its design and construction; it is meant to create seals that prevent fluids or gases from passing through. However, when replacement is not viable, the process of straightening the teeth with a chisel is appropriate for restoring some functionality to the packing.

Labyrinth packing operates by having interlocking teeth that create a barrier against leaks. If the teeth become deformed or damaged, using a chisel can help realign them to re-establish a tighter seal. This method preserves the original packing structure as much as possible, making it a more effective temporary solution than other options.

Other methods suggested, such as applying sealant material or using a compression fitting, do not directly address the specific structural issues of labyrinth packing. Patching with similar material could lead to further complications since labyrinth packing is specifically designed to work in a certain way that doesn't lend itself to patchwork solutions.