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Do not put acetone in a plastic cup

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Forum topic by jsheaney posted 1231 days ago 3197 views 0 times favorited 11 replies Add to Favorites Watch
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jsheaney

141 posts in 2587 days


1231 days ago

I just learned that today. I bought some Minwax wood hardener, which I have never used before. The container is a bottle, so clearly you need to pour it into another container to use it. I poured a few ounces into a plastic cup. I put a piece of scrap in my Jawhorse and started applying it. I was sitting on a stool at the time and suddenly my leg was getting wet. Basically the bottom dissolved away and all of it just poured out the bottom. It took about three minutes to start leaking and about five seconds to open up entirely once it started.

Now I have a serious mess on my floor. I don’t know what else is in this stuff; it seems to be about 98% acetone. My shop floor is just the plywood subfloor painted with a couple coats of poly. This stuff is really sticky (at least, at first), so I tried to wipe it up with more acetone, but it started peeling up the paint off the floor.

I just left it be for now. I’ll see what happens when it cures. Pain in the butt.

Anyway, it looks like you should only put acetone in a glass or metal container.

-- Disappointment is an empty box full of expectation.


11 replies so far

View therookie's profile

therookie

887 posts in 1426 days


#1 posted 1231 days ago

Good lesson learned there, I am thankful you told us all about this.

-- http://aewoodworks.webs.com

View Carl Webster's profile

Carl Webster

82 posts in 1397 days


#2 posted 1230 days ago

Most solvents (acetone, lacquer thinner, gasoline, etc.) will desolve the plastic in a regular plastic cup.

-- Carl in SC

View Loren's profile

Loren

7234 posts in 2247 days


#3 posted 1230 days ago

I’ve got a glass jar full of lacquer thinner with a plastic lid that’s softened
and sagged and fused to the jar. The fumes haven’t made a hole in the
lid yet, but it got to the point where it is pretty quick. I’m keeping
an eye on it, partly out of curiosity to see how long it takes to make
a hole.

-- http://lawoodworking.com

View Bill White's profile

Bill White

3343 posts in 2559 days


#4 posted 1230 days ago

Uh, Loren? Ya got too much free time.
Bill

-- bill@magraphics.us

View Loren's profile

Loren

7234 posts in 2247 days


#5 posted 1230 days ago

I had a can of unidentified thinner that got crushed somehow,
so when I opened it and discovered it was lacquer thinner, I
scrambled to get whatever jars I could lay my hands on.
That’s how it happened.

-- http://lawoodworking.com

View rance's profile

rance

4125 posts in 1759 days


#6 posted 1230 days ago

Yeah, it eats through a styrofoam coffe cup quicker than you can say abracadabra-alaczam! Not thinking, one day I poured some in a coffe cup to take across to the other side of the shop. Uh, I made it about 4” towards the other side of the shop. Luckilly only had a few oz in the cup. Spilled all over the workbench. I laughed about it. Hope you can get your mess cleaned up.

-- Backer boards, stop blocks, build oversized, and never buy a hand plane--

View jsheaney's profile

jsheaney

141 posts in 2587 days


#7 posted 1230 days ago

So the two solvents I use most are mineral spirits and alcohol. I’ve kept oil based finishes and shellac in plastic cups for days at a time without any problem, but I’ve never done that with pure solvent before. Today I put a couple ounces of each in separate plastic cups. Neither one leaked or showed any ill effects after sitting out all day. Acetone is the first (and only, so far) solvent I’ve used that exhibited this problem.

-- Disappointment is an empty box full of expectation.

View Ollie's profile

Ollie

146 posts in 1873 days


#8 posted 1229 days ago

Ha ha. this happened to me before too. Now I save jam jars.

-- Ollie, UK.

View ChrisForthofer's profile

ChrisForthofer

150 posts in 1666 days


#9 posted 1229 days ago

Mason jars are your friend, (the Jam jars Ollie refers to) they are cheap, made of pretty tough glass and are impervious to most any solvent you can think of. Sorry for your mess.

Chris.

-- -Director of slipshod craftsmanship and attention deficit woodworking

View Kent Shepherd's profile

Kent Shepherd

2697 posts in 1885 days


#10 posted 1229 days ago

When I was a kid, I had tried to paint a model motorcycle I had assembled. I didn’t like the way it looked, and knowing lacquer thinner would strip paint, I left the model to soak for a while. I learned a valuable lesson.
I ended up with a nice glob of plastic. Some lessons we have to learn the hard way.

-- She thought I hung the moon--now she just thinks I did it wrong

View PhineasWhipsnake's profile

PhineasWhipsnake

77 posts in 1647 days


#11 posted 1229 days ago

Here’s another tip I stole from another forum: “Never, under any circumstances, combine a sleeping pill, and a laxative on the same night”

-- Gene T

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