Is 90* temperature too hot to spray epoxy?

O

oldjunkster

Member
Seems like it is either raining or the temperature is in the 80s or 90s. Is it ok to spray the SPI epoxy when the temp is that hot? Maybe use some reducer? I have the SPI-870 Medium Reducer.

Thanks in advance.
 
I live in Arizona so 90 degrees is a regular occurrence. Normally I try to spray in the morning hours while the temps are little lower however I have sprayed in 90 plus temps before with no issues. Make sure metal isn't exposed to direct sunlight because it will be much hotter than the air temperature if it is. I use an infrared thermometer to check metal temps.
No need to reduce it but won't hurt if you do.
 
870 will speed the epoxy up, not slow it down. I have used a very small amount of SPI retarder when spraying a frame in the heat, it seems to help some. But most of the time it should not be necessary, epoxy loves the heat actually, if it is being used as a primer and not a finish coat there is no issue at all.
 
Quick update.

Sprayed the SPI epoxy primer yesterday. Temp was in the high 80s and the primer went on without any problems and is curing. Thanks for the help.
 
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