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Ideas for a finish that is heat resistant

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Forum topic by MikeUT posted 01-15-2019 07:47 PM 584 views 0 times favorited 6 replies Add to Favorites Watch
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MikeUT

196 posts in 1923 days


01-15-2019 07:47 PM

My 3 year old tried using my wife’s hair brush as a drum stick and the brush lost. After epoxy and CA glue repairs failed I decided to have a little fun. I made a brush handle that accepted the bristles out of walnut and purpleheart. My first thought was to finish with a poly to protect it from inevitable moisture, but I’m not sure how a plastic finish will hold up to being used with a hairdryer. Can poly withstand heat? Is there a better option? Thanks in advance!


6 replies so far

View JohnMcClure's profile

JohnMcClure

815 posts in 1204 days


#1 posted 01-15-2019 08:20 PM

First, Great Job!
Second,
I have no idea but there was a thread about a fire-pit-surrounding table on here a while back, here it is:
http://lumberjocks.com/topics/233537
Don’t know if this is helpful, though, because since the brush will be in her hand it’s not likely to get ALL that hot. So the fire retardant is probably overkill. But there may be some useful commentary in there about finishes that have withstood heat.

-- I'd rather be a hammer than a nail

View HokieKen's profile

HokieKen

11598 posts in 1702 days


#2 posted 01-15-2019 08:31 PM

It’s a good question, I’m not sure of the answer but propose an information-gathering (in which you do all the work)

;-p

Take some scrap Walnut and put different finishes on a few different pieces. I would suggest poly, lacquer and maybe CA glue. Then set up a hair dryer aimed at each piece and blast it for say 5 minutes, let it set for 5 minutes and blast again. Rinse and repeat for a couple of days. That should give you a good idea of how each finish reacts to the hot air over an (accelerated) year or two.

Again, I propose this selfishly. I don’t have an immediate need but I could certainly see the information being handy in the future :-)

-- Kenny, SW VA, Go Hokies!!!

View ArtMann's profile

ArtMann

1447 posts in 1380 days


#3 posted 01-15-2019 08:47 PM

All I can say is this. I make and sell carved wooden trivets and I needed a finish that would withstand hot dishes being placed on them. The best product I found locally is Minwax Polyurethane varnish. It holds up better than either lacquer or shellac. I tested the finish with a ceramic casserole dish preheated to 350F. There was no damage after many cycles.

View BlueRidgeDog's profile

BlueRidgeDog

499 posts in 343 days


#4 posted 01-15-2019 08:51 PM

Most finishes should withstand the heat involved, if it peals the finish there would be so much heat there would be no hair left on the head being styled.

View mizzouwood's profile

mizzouwood

2 posts in 1029 days


#5 posted 01-15-2019 08:59 PM

Poly should handle the heat of a hair dryer without problem. The brush seldom sits in front of the hair dryer for long, and certainly not for minutes at a time. I see you took the pictures with a towel around your waist, I’m glad you did us all the curtesy of wearing a towel.

View MikeUT's profile

MikeUT

196 posts in 1923 days


#6 posted 01-16-2019 12:40 AM



Poly should handle the heat of a hair dryer without problem. The brush seldom sits in front of the hair dryer for long, and certainly not for minutes at a time. I see you took the pictures with a towel around your waist, I m glad you did us all the curtesy of wearing a towel.

- mizzouwood

Haha Lance, you would notice that…

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