The manufacturer recommends that for storing POR to transfer the unused portion to a glass sealer jar. Put a piece of Saran-wrap over the top then tightne down the lid. Keep it in a cool dark place (fridge is best). I have done that and it works fine - keeps for a LONG time (months). I have also used the hole in the lid method, with duct tape to seal it. My issue with that is that when I poured it, it gets all over the can and lip and it's not easy to clean off, so the duct tape stops sticking well.
Directions also state NOT to shake it, but onl to stir it. Shaking it introduces air bubbles which shortens the life of the product, or instroduces contaminants whcih lessens it's ability to self-level and adhere.
The underside of this 56 is all POR, as have been all my projects for 10 years. I love the stuff.
http://4.bp.blogspot.com/-uuHdUbUIV...c/s600/IMG00614-20111127-1425-731559.jpg
