In article , sportster64
@hotmail.com says...
The anti-freeze you buy for boats and RV's - does it have a shelf life
and loose its -50 burst protection over time ? I have a couple of
bottles from last year stamped 10/03 on the caps still sealed. Can I
use them to winterize the boat this fall ?

I'm guessing it'll remain good long past the time you and I are
decomposed.

jps