Stan wrote:
Is there a way/method for extending the shelf life of Minwax Wood
Putty after the jar has been opened? I know that the small jars only
cost less than $3/per but it sure seems a waste to have to buy a new
jar of each color 4 months after each one has been opened and a little
bit used.

Thanks in advance....

Open the lid .. blow in a little propane from a torch .. close the lid.
Propane, being heavier than air will sink to the bottom, effectively
keeping the oxygen away from the putty, which needs oxygen to cure/dry.