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Regular Build 2k temps

Well versed in the epoxy temp warnings, but what about the 2k? Seems like all the times I have used 2K primers the temp has always been in the mid 70s to the mid 90s. But Florida is getting into its six weeks of "cold", and due to my day job the temps are dropping so fast in the evening. Last night at 7pm panel temps were about 50-53 degrees using a Fluke laser gun. For the next several weeks the temps are going to be bouncing around with highs in the mid 60s and 70s and lows in the 50s. And long story short, the shop where I do the metal work and body work is essentially always the same temperature as the surrounding area as its not fully enclosed. My booth is in a fully enclosed building which will keep the temp more stable, but I dont want to use my booth for primer work for various reasons.

I saw in the tech sheet it mentions the polar activators but does not really give any direction to at which point these products become a necessity. At material temps in the 50s will there be curing or other issues or is that stuff really made for COLD temps?


Paint Fanatic
Staff member
60 I would say now "very good idea" for polar to be used, 65 or above only if you need to rush something with the 2K primers.
Just watch your pot life if polar is added.
This is just me personally, but I just won't spray if surface temps can't be maintained above 65°. There are too many potential problems, like solvent trapping and very slow curing. I suppose if the primer is going to sit for weeks of months it's not as much of an issue, but generally it's so much better to eliminate low temp as a variable, especially if paint will be applied within a few days.