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Denatured Alcohol ...???

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Forum topic by 1voyager1 posted 04-16-2016 07:18 PM 773 views 0 times favorited 14 replies Add to Favorites Watch
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1voyager1

74 posts in 898 days


04-16-2016 07:18 PM

I gave up on the idea of using shellac as a sealer because I could not find alcohol content specifications for the denatured alcohol available locally.
I’ve finally come up with this information for the locally available Klean Strip QSL26, GSL26.
These SEEM to be the same as what used to be called SLX DNA.
Both are now designated as being fuel @ 40-50% ethanol / 50-55% methanol, which does give it a 90-95% alcohol content.
I find that its being about 1/2 methanol a bit disquieting.

Then, there is the Klean Strip QKGA75003 Green DNA @ 85-90% methanol / <5% methanol, which puts it also into the 90-95% alcohol region.
The lower methanol content is less concerning.
This has received a bad review here on LJ for its use as a shellac solvent.

So,

1.
Is the higher methanol content and its vapors of greater concern?

2.
Is methanol a better solvent for shellac than ethanol?

-- Every mighty oak is nothing more than a nut that has stood it's ground.


14 replies so far

View CharlesA's profile

CharlesA

3025 posts in 1264 days


#1 posted 04-16-2016 07:29 PM

I follow the advice of Shellac.net:

A ‘high test’, 190 proof (5% denaturants), Denatured Ethanol Alcohol is preferred
as a Shellac Flake Solvent.

Unfortunately NOT all Denatured Alcohols are equal and there is No purity standard or required ethanol content to be labeled “Denatured Alcohol”.

It is next to impossible to find a 190 proof alcohol at the ‘big box’ home improvement or hardware stores. Many brands are formulated with as little as 50-60% Ethanol – and the balance are cheaper alcohols and denaturing solvents. Recently we went in search of high test Denatured Alcohol.
Out of ten paint, hardware, and home improvement stores, only the local Sherwin Williams paint
store had a190 Proof alcohol. The Material Safety Data Sheet (MSDS) will list the ingredient percentages of the product (most can labels do not).

So I either use the Kleen Strip Green or I just bought a 5 gallon can of Sunnyside, also 90+% of ethanol, for $50 from Zoro.com!

-- "Man is the only animal which devours his own, for I can apply no milder term to the general prey of the rich on the poor." ~Thomas Jefferson

View distrbd's profile

distrbd

2227 posts in 1912 days


#2 posted 04-16-2016 09:32 PM

Costco sells 99% Alcohol in packages of four, it does the job for me.

-- Ken from Ontario, Canada

View CharlesA's profile

CharlesA

3025 posts in 1264 days


#3 posted 04-16-2016 09:37 PM



Costco sells 99% Alcohol in packages of four, it does the job for me.

- distrbd

Seems like an odd product for Costco.

-- "Man is the only animal which devours his own, for I can apply no milder term to the general prey of the rich on the poor." ~Thomas Jefferson

View Kazooman's profile

Kazooman

628 posts in 1418 days


#4 posted 04-16-2016 09:58 PM


Costco sells 99% Alcohol in packages of four, it does the job for me.

- distrbd

Seems like an odd product for Costco.

- CharlesA

I think it is in the adult beverages aisle in the moonshine section.

View AandCstyle's profile

AandCstyle

2575 posts in 1723 days


#5 posted 04-16-2016 10:00 PM

Voyager, methanol has relatively low toxicity as long as you don’t drink it. Shellac dissolves in most any common alcohol. If you want to remove water from alcohol, add dry tapioca to the alcohol. The tapioca will absorb water from the solution leaving “pure” alcohol. Let the tapioca dry and it can be reused, although not to make pudding unless the alcohol was ethanol, i.e. not denatured with methanol. HTH

-- Art

View bearkatwood's profile

bearkatwood

1211 posts in 478 days


#6 posted 04-17-2016 12:22 AM

vodka brother, cheap vodka. ;)

-- Brian Noel

View distrbd's profile

distrbd

2227 posts in 1912 days


#7 posted 04-18-2016 01:45 PM



vodka brother, cheap vodka. ;)

- bearkatwood


Lol,THat, I should try.

-- Ken from Ontario, Canada

View AlanBienlein's profile

AlanBienlein

159 posts in 2140 days


#8 posted 04-18-2016 02:07 PM

We use Everclear.

View 1voyager1's profile

1voyager1

74 posts in 898 days


#9 posted 04-18-2016 08:46 PM

Deleted.
Things got screwed up and I ended up with double posts.

-- Every mighty oak is nothing more than a nut that has stood it's ground.

View 1voyager1's profile

1voyager1

74 posts in 898 days


#10 posted 04-18-2016 08:48 PM

Deleted

-- Every mighty oak is nothing more than a nut that has stood it's ground.

View pintodeluxe's profile

pintodeluxe

4859 posts in 2279 days


#11 posted 04-18-2016 08:53 PM

Specs aside, I have had good luck with the standard gallons of denatured alcohol from Klean Strip and Sunnyside. I use it to thin pre-mixed shellac and it works fine.

-- Willie, Washington "If You Choose Not To Decide, You Still Have Made a Choice" - Rush

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1voyager1

74 posts in 898 days


#12 posted 04-18-2016 09:07 PM


Costco sells 99% Alcohol in packages of four, it does the job for me.

- distrbd

COSTCO is a 2hr. drive across the island and doesn’t seem to carry anything other than drug store and consumable type alcohol.
Plus, I really hate to pay the ATF federal tax on consumable ethanol.
It drives the alcohol cost unreasonably high, especially for use as a painting solvent.
Being as I am not an alcohol drug user, I cannot justify its purchase with the recreational use of the leftovers.

- 1voyager1

I follow the advice of Shellac.net:

A high test , 190 proof (5% denaturants), Denatured Ethanol Alcohol is preferred
as a Shellac Flake Solvent.

Unfortunately NOT all Denatured Alcohols are equal and there is No purity standard or required ethanol content to be labeled “Denatured Alcohol”.

It is next to impossible to find a 190 proof alcohol at the ‘big box’ home improvement or hardware stores. Many brands are formulated with as little as 50-60% Ethanol – and the balance are cheaper alcohols and denaturing solvents. Recently we went in search of high test Denatured Alcohol.
Out of ten paint, hardware, and home improvement stores, only the local Sherwin Williams paint
store had a190 Proof alcohol. The Material Safety Data Sheet (MSDS) will list the ingredient percentages of the product (most can labels do not).

So I either use the Kleen Strip Green or I just bought a 5 gallon can of Sunnyside, also 90+% of ethanol, for $50 from Zoro.com!

- CharlesA

This is the reason I m a bit leery about the Kleen Strip Green:
http://lumberjocks.com/reviews/3016

-- Every mighty oak is nothing more than a nut that has stood it's ground.

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CharlesA

3025 posts in 1264 days


#13 posted 04-18-2016 09:14 PM


This is the reason I m a bit leery about the Kleen Strip Green:
http://lumberjocks.com/reviews/3016

- 1voyager1

That’s too bad. I’ve used it without a problem. I wonder if there’s any chance they’ve reformulated it in the past few years.

-- "Man is the only animal which devours his own, for I can apply no milder term to the general prey of the rich on the poor." ~Thomas Jefferson

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1voyager1

74 posts in 898 days


#14 posted 04-18-2016 09:16 PM


Specs aside, I have had good luck with the standard gallons of denatured alcohol from Klean Strip and Sunnyside. I use it to thin pre-mixed shellac and it works fine.

- pintodeluxe


Yeah, I’m thinking that that is the DNA that I’ll be using even with its higher methanol content.
I’ve been mulling this over for a few months now for use with flake shellac because of the mfgrs. hiding the mixture percentages from us.
It has probably become a bit of an obsession for me.

-- Every mighty oak is nothing more than a nut that has stood it's ground.

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