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

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Forum topic by DanaLynn posted 02-09-2013 12:05 PM 1142 views 0 times favorited 5 replies Add to Favorites Watch
View DanaLynn's profile


40 posts in 3216 days

02-09-2013 12:05 PM

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,

5 replies so far

View camps764's profile


867 posts in 3442 days

#1 posted 02-09-2013 12:19 PM

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

View stnich's profile


130 posts in 4006 days

#2 posted 02-09-2013 12:49 PM

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

30615 posts in 3420 days

#3 posted 02-09-2013 12:50 PM

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

-- Nature created it, I just assemble it.

View Fred Hargis's profile

Fred Hargis

6986 posts in 3575 days

#4 posted 02-09-2013 12:57 PM

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.

-- Our village hasn't lost it's idiot, he was elected to congress.

View GrandpaLen's profile


1652 posts in 3354 days

#5 posted 02-09-2013 12:58 PM


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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