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Minimum Painting Temperature #503401
Sun Feb 08 2009 07:11 PM
Sun Feb 08 2009 07:11 PM
N
norcal49er  Offline OP
Wrench Fetcher
Joined: Jul 2007
Posts: 293
Redding, CA
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
Sun Feb 08 2009 07:27 PM
M
Mr. Lang  Offline
Shop Shark
Joined: Jun 2008
Posts: 1,455
Brentwood Bay, BC Canada
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
Sun Feb 08 2009 08:22 PM
O
oldcarandtrucknut  Offline
Shop Shark
Joined: Dec 2004
Posts: 423
Indiana
Nope, 55 is no good. 70 at least.

Re: Minimum Painting Temperature [Re: oldcarandtrucknut] #503451
Sun Feb 08 2009 08:38 PM
Sun Feb 08 2009 08:38 PM
5
50adrod  Offline
Wrench Fetcher
Joined: Dec 2007
Posts: 181
Louisiana
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.


1950 custom streetrod build
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Re: Minimum Painting Temperature [Re: 50adrod] #503471
Sun Feb 08 2009 09:27 PM
Sun Feb 08 2009 09:27 PM
Tiny  Offline
Global Mod
Joined: Aug 2005
Posts: 8,545
South Central Kansas
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.


Save a life, adopt a senior shelter pet.
The three main causes of blindness: Cataracts, Politics, Religion.
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Re: Minimum Painting Temperature [Re: Tiny] #503484
Sun Feb 08 2009 09:48 PM
Sun Feb 08 2009 09:48 PM
J
Jimmie D  Offline
Shop Shark
Joined: Feb 2006
Posts: 442
Grand Junction, Colo.
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
Sun Feb 08 2009 10:41 PM
N
norcal49er  Offline OP
Wrench Fetcher
Joined: Jul 2007
Posts: 293
Redding, CA
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
Sun Feb 08 2009 11:39 PM
Tiny  Offline
Global Mod
Joined: Aug 2005
Posts: 8,545
South Central Kansas
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
Tue Feb 10 2009 01:00 AM
P
Pakrat48  Offline
Shop Shark
Joined: Jan 2005
Posts: 365
Butterfield, MN.
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
Tue Feb 10 2009 03:03 AM
W
Wally Body  Offline
Wrench Fetcher
Joined: Nov 2007
Posts: 81
Minnesota
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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