Crankshaft seal shelf life

[almondgt]

Any ideas as to the shelf life of a new, never used Husqvarna crankshaft seal? What is the rubber compound used to make an oem seal? I have some seals with a date on the tag from 1993. They feel ok and springs not rusty.

 

[heimannm]

I have been using some NOS McCulloch seals that have to be 25 years old with no problems. I cannot attest to how long they will last but I have some saws running fine after 2 or 3 years.

Mark

 

[buzz sawyer]

I have some nos Homelite seals from the 50s. They are still pliable and work well.