I purchased a 5gal. bucket of Valspar Duramax exterior paint. I can't
return it because it was color tinted. I wasn't able to sell it when
the weather was nice. Now that the weather has gone to the dogs I'm
afraid I'm stuck with it, hence my question. How long will the paint
remain usable if it just sits in the garage, exposed to the cold
temperatures that come with winter? Thanks for any knowledge.
I tried using some paint which the previous owner of my home left in the
garage for 3 winters and it behaved oddly. Why do you need to store your
leftover paint in the garage?
On the other hand, I have 5-6 year old paint which have been stored indoors,
and they work as well as the day I bought them.
As other poster says, if it's latex and you let it freeze it'll not
likely remain in good shape to use later.
OTOH, I've used paint leftover from Dad that's been in the pumphouse
that is heated to roughly 40s/50s for 20 yrs or longer and it has seemed
just fine...I don't necessarily recommend this as a plan, but... :)
Freezing breaks emulsions and might also be true for oil based paint.
In any case I would not let it freeze.
Storage time depends on container. Cans may rust out in 5-10 years.
Plastic may be better but you also need to worry about drying in the
container which should be tightly sealed, usually best upside down.
I'd buy an empty gallon can at HD, save a gallon, and ditch the rest. Keep
the gallon in the house for use as touch-up.
Next time hint for touch-up: Find a spray can of paint whose color you like.
Have the paint people match it and paint your house with the matched paint.
Thereafter, if you have to patch a hole, deal with bird droppings, or have a
hunk that peels off, a squirt out of the spray can should make things right.
Open it up to check if it has a skin of dried paint on top. If it does,
remove the skin. Next cover directly on top of the good paint with
either the special plastic tops they make, or waxed paper, or
cellophane. Anything that will make a decent seal between the paint and
the air in the bucket. (also make sure it will be removable) I don't
know your garage or weather but if it never goes below freezing then
store it in the garage. If it gets freezing in the garage, bring it
inside. Preferably somewhere cool.
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