my strong recommendation is to keep your epoxy inside and at a normal room temperature or better.

i would also recommend a call to MAS tech support to get their recommendation. they pick up the phone and are happy to help.

epoxy, when it is cold, get pretty viscous and other issues develop that may impact the ability to get a good and/or accurate mix. my last build, where i had cold epoxy was a bit of a horror story......first time i had ever had a problem in over 15 years of building....and the first time i let the epoxy temperature be subject to outside/cold temperature variation. not saying that was the definitive cause of the problem.....but was cited as one of the possible causes by the folks at MAS. brought all my epoxy in last week from my unheated garage into a storage room in the house already.

i would bring it inside until you get a definitive recommendation from the folks at MAS.

howard