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drying time of water poly?

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Forum topic by JesseTutt posted 10-25-2012 07:53 PM 645 views 0 times favorited 9 replies Add to Favorites Watch
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JesseTutt

811 posts in 859 days


10-25-2012 07:53 PM

Topic tags/keywords: question water based poly finishing

I am trying out Minwax’s Polycryllic water based finish. On the Internet it said “dries to the touch in two hours.” Today I setup a table in the back yard and tried spraying several pieces of wood. The sun was shining; temperature was 80 F and humidly was 52%. I noticed that by the time I had the sprayer cleaned the wood was dry to the touch. This got me to wondering does water based poly dry this fast all the time? How much does the sun shining on the wood and / or temperature affect drying?

-- Jesse, Saint Louis, Missouri


9 replies so far

View CharlieM1958's profile

CharlieM1958

15801 posts in 2967 days


#1 posted 10-25-2012 07:59 PM

Sun, warm temps, and relatively low humidity will all speed up drying. I don’t spray much, so maybe one of the experts will chime in here with some advice regarding the positives and/or negatives of spraying in direct sunlight.

-- Charlie M. "Woodworking - patience = firewood"

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NiteWalker

2710 posts in 1325 days


#2 posted 10-25-2012 08:31 PM

The crystalac super premium I use dries to the touch in 15-30 minutes.
I <3 waterbornes.

-- He who dies with the most tools... dies with the emptiest wallet.

View JesseTutt's profile

JesseTutt

811 posts in 859 days


#3 posted 10-25-2012 08:45 PM

I have a covered car port (concrete floor and a metal roof). As fall progresses I was thinking of using Harbor Freight plastic tarps and spring clamps to turn it into a temporary room for spray finishing. I would use milk crates, a piece of plywood and cardboard over the ply to form a table.

For water based finishes, what is the temperature and humidity range?

Is there any problem using a propane heater, un-vented, to heat it?

If water based finishes dry faster in sunlight, could I suspend a couple of heat lamps pointed down on the table?

What about these quartz IR electric heaters, could I suspend them from the roof pointed down?

-- Jesse, Saint Louis, Missouri

View Dusty56's profile

Dusty56

11684 posts in 2436 days


#4 posted 10-25-2012 08:46 PM

“dries to the touch” , doesn’t mean it has fully cured : )

-- I'm absolutely positive that I couldn't be more uncertain!

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JesseTutt

811 posts in 859 days


#5 posted 10-25-2012 08:48 PM

Would “Dries to the touch” be sufficient to keep dust from sticking to the finish?

-- Jesse, Saint Louis, Missouri

View RussellAP's profile

RussellAP

2966 posts in 1035 days


#6 posted 10-25-2012 08:48 PM

Spraying does seem to render manufacturers drying times useless. It puts down such a thin and even coat that it dries uniformly and pretty quickly. Oil is the exception, but I don’e spray oils.

-- A positive attitude will take you much further than positive thinking ever will.

View Monte Pittman's profile

Monte Pittman

15464 posts in 1086 days


#7 posted 10-25-2012 08:50 PM

Also depends if it is first cpat, second and so on. Soaks in dries faster.

-- Mother Nature created it, I just assemble it.

View RussellAP's profile

RussellAP

2966 posts in 1035 days


#8 posted 10-25-2012 08:50 PM

Don’t forget that you probably got more air flow than you would have inside. Pretty much anything that falls on it before it’s cured can stick.

-- A positive attitude will take you much further than positive thinking ever will.

View Cosmicsniper's profile

Cosmicsniper

2199 posts in 1907 days


#9 posted 10-25-2012 09:46 PM

That’s one of the major advantages to water-borne finishes. My favorite is the GF Enduro-Var. It dries almost as fast as thinned shellac. Love it. I routinely lay down 3 coats within 1 hour, sanding in between.

-- jay, www.allaboutastro.com

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