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How can you get a polyeurthene spray finish to dry faster....heat?

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Forum topic by DanaLynn posted 537 days ago 464 views 0 times favorited 5 replies Add to Favorites Watch
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DanaLynn

40 posts in 739 days


537 days ago

Topic tags/keywords: finishes time eastern red cedar heat question

I have a heart shapped puzzle I made for a giveaway at church this morning and is still feels tacky…will heat make it dry quicker?

-- Dana, Indiana, http://www.facebook.com/DynamicWoodArt


5 replies so far

View camps764's profile

camps764

775 posts in 965 days


#1 posted 537 days ago

Not sure, but I have a feeling the answer is …”kind of”

I believe, with Polyurethane, it is not only drying but also curing at the same time. I know extreme cold can slow drying times (less than 60 degrees) and I think extreme heat can make it dry too fast and cause problems as well.

I would get the piece inside at a comfortable room temperature and let the finish do it’s thing.

In the future you can get slightly faster results by cutting (mixing) the Poly with mineral spirits to make a Wipe on Poly.

Hope this helps! I’ll be interested to hear what some of our finishing pro’s have to say about speeding up the dry time.

-- Steve. Follow me on Instagram: http://instagram.com/campbellwoodworking or check me out on Facebook https://www.facebook.com/campbellwoodworkingne

View stnich's profile

stnich

107 posts in 1529 days


#2 posted 537 days ago

I finish small pieces with poly on a regular basis. To speed up the drying-curing time I have made a shelter made of cut up corrugated cardboard boxes. My spray area is the top of an old ping pong table (family hates that I took over the table). The cardboard is open on one end where I have a small heater that has a fan that blows into the shelter. It does not come in contact with the cardboard and has an automatic shut off if it falls. Usually I only use half of the table length wise. The card board running down the middle is about 16” tall. Then on the side of the table the cardboard is tall enough to go all the way to the floor. On the end that is closed is a piece that also goes to the floor. There is a top of cardboard that runs the entire length of the shelter. I have found that this works very well. I’m careful not to leave the heat portion of the heater running when I’m not around. The heater has a fan mode that I can leave on when I’m not around. Obviously you need to be careful because of the possible fire hazard. I’ve been using this technique for years.

View Monte Pittman's profile

Monte Pittman

13374 posts in 943 days


#3 posted 537 days ago

Steve is right with the kind of. Sometimes when you try to dry it too fast you’ll wind up with a crappy finish.

-- Mother Nature created it, I just assemble it. - It's not ability that we often lack, but the patience to use our ability

View Fred Hargis's profile

Fred Hargis

1655 posts in 1098 days


#4 posted 537 days ago

Gentle air movement across the surface will speed it up as well. The finish is actually curing by reacting with oxygen, so a little warmth and air flow will help the reaction.

-- I long for the days when Coke was a cola, and a joint was a bad place to be (Merle Haggard)

View GrandpaLen's profile

GrandpaLen

1471 posts in 877 days


#5 posted 537 days ago

Dana,

Air movement across the surfaces will do more to aid drying than additional heat will.

Check the Manufacturer’s suggested optimum curing temperature range and direct a fan towards the project and the air movement should help speed the curing process.

Best Regards. – Grandpa Len.

Work Safely and have Fun.

-- Mother Nature should be proud of what you've done with her tree. - Len ...just north of a stone's throw from the oHIo, river that is, in So. Indiana.

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