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Minimum Painting Temperature #503401 Sun Feb 08 2009 07:11 PM
Joined: Jul 2007
Posts: 293
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norcal49er Offline OP
Wrench Fetcher
This seems like a crazy simple question, but I've spent the last two hours searching this site and the web with no luck. I'm painting my truck with PPG Shop-Line JAU Acrylic Urethane. What is the minimum ambient air temperature for painting?? The high temperature in Redding today will be about 55F. Will a get acceptable results?

There is no information on the paint can, the project data sheets, or the PPG website; which I find to be amazing considering how much paint PPG sells.

Re: Minimum Painting Temperature [Re: norcal49er] #503407 Sun Feb 08 2009 07:27 PM
Joined: Jun 2008
Posts: 1,455
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Mr. Lang Offline
Shop Shark
I don't know about your fancy paint, but I know regular old oil paint won't cure, and or set down properly if it's under 40F. I think more temp would be advisable. I also think someone else with more knowledge will chime in.


Christopher

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Re: Minimum Painting Temperature [Re: Mr. Lang] #503439 Sun Feb 08 2009 08:22 PM
Joined: Dec 2004
Posts: 423
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oldcarandtrucknut Offline
Shop Shark
Nope, 55 is no good. 70 at least.

Re: Minimum Painting Temperature [Re: oldcarandtrucknut] #503451 Sun Feb 08 2009 08:38 PM
Joined: Dec 2007
Posts: 181
5
50adrod Offline
Wrench Fetcher
Originally Posted by oldcarandtrucknut
Nope, 55 is no good. 70 at least.

I agree and remember it is the metal temp along with the air temp. gat a cheap laser temp gun to check. you will be supprised the difference in temps.


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Re: Minimum Painting Temperature [Re: 50adrod] #503471 Sun Feb 08 2009 09:27 PM
Joined: Aug 2005
Posts: 8,621
Tiny Offline
Global Mod
Most paint manufacturers recommend 70f or above if I remember right. Having said that I've painted in the 40s but got more than average orange peel when doing so.


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Re: Minimum Painting Temperature [Re: Tiny] #503484 Sun Feb 08 2009 09:48 PM
Joined: Feb 2006
Posts: 443
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Jimmie D Offline
Shop Shark
Here is a couple of things. First look at the can of paint. Try to peel the seem away. Usually there is a wrap and a half of label on the can. The hidden part of the label has the information for the paint. Flash times, temps, ect. Or you can go to the PPG website. It is a real pain to navigate, but has all the info you need on the paint you have, including recommendations, and the MSDS sheets.

Re: Minimum Painting Temperature [Re: Jimmie D] #503514 Sun Feb 08 2009 10:41 PM
Joined: Jul 2007
Posts: 293
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norcal49er Offline OP
Wrench Fetcher
I checked the cans, the MSDS, and the website. There's enough safety information out there to make me nauseous, but nothing on recommended application temperatures. 70F seems like the right answer, but I wish I could find something from the manufacturer.

Re: Minimum Painting Temperature [Re: norcal49er] #503536 Sun Feb 08 2009 11:39 PM
Joined: Aug 2005
Posts: 8,621
Tiny Offline
Global Mod
Originally Posted by norcal49er
......I wish I could find something from the manufacturer.

Click the contact us link. Nothing like getting it from the horse's mouth.


Save a life, adopt a senior shelter pet.
The three main causes of blindness: Cataracts, Politics, Religion.
Name your dog Naked so you can walk Naked in the park.
Re: Minimum Painting Temperature [Re: Tiny] #504035 Tue Feb 10 2009 01:00 AM
Joined: Jan 2005
Posts: 365
P
Pakrat48 Offline
Shop Shark
click Is this what you found? Follow the tech info link, it gives drying times @ 70deg. Doesn't give min. temp, but I would hold out for at LEAST 65-70 with low humidity, the colder it is, the faster the reducer.


Keith
If it were easy they'd have grade schoolers doing it!
Re: Minimum Painting Temperature [Re: norcal49er] #504090 Tue Feb 10 2009 03:03 AM
Joined: Nov 2007
Posts: 81
W
Wally Body Offline
Wrench Fetcher
Check with your paint supplier for the MSDS sheets.
Urethane need a minimum temp during the crosslinking period to cure properly.
If you try to paint at too low a temp. you risk having the paint remain soft , nothing you can do once that happens,just strip it off.
Also, urethanes should have sufficient air flow across the surface during drying to insure that solvents aren't trapped causing solvent " popping" which resemble blisters in the surface.
All in all it would be best to wait for the temp to be at least 70 for spraying.
It will save a lot of time (and money) in the long run!

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