GF's Sanding Sealer: Zinc Stearate?

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Forum topic by bambooMan posted 07-01-2010 07:17 PM 2866 views 0 times favorited 3 replies Add to Favorites Watch
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6 posts in 3125 days

07-01-2010 07:17 PM

Topic tags/keywords: question finishing sanding

General Finishes Water Based Sanding Sealer:

MSDS says it contains the following:

Ammonia salts of modified styrene-acrylic polymers
Glycol ethers
Tributoxyethyl phosphate

So none of those say “zinc stearate” but I’m not a chemistry major so I dont know if they equate to it or not.

I’d like to know because I am finishing items that can be used as cups, vases, etc and will be subject to heat, water, oil, acidic spills etc. I have read that zinc stearate should not be part of the finishing regime if all of these things are going to be in the target environment.

GF also indicates that this “sanding” sealer will make the final finish that much more resilient… it must not be just a normal sanding sealer?


-- Why Bamboo? Because its free lumber. And in the SouthEast anyway, it grows everywhere.

3 replies so far

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8548 posts in 3887 days

#1 posted 07-01-2010 07:22 PM

I think that the best source for your questions is GF. I head they have a very pleasant and informative CS.

would be curious to hear wht they have to say though.

-- ㊍ When in doubt - There is no doubt - Go the safer route.

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6 posts in 3125 days

#2 posted 07-02-2010 12:46 AM

Ok, I sent GF an email. The email goes to a single person who is on vacation. Thats a little odd. I thought they were a big company. Maybe not.

I also posted on homestead
Jeff Jewitt answered and said:
“Water based sanding sealers contain water-dispersible stearates. However all waterbornes are self-sealing so just skip the sanding sealer and use the finish itself as it’s own sealer. Most waterbornes sand good enough in my opinion to negate the use of sanding sealers except for certain situations.”

I in fact had already done what he said because I read his book, “Tauntons Complete Illustrated Guide To Finishing”. I had taken GF’s HP PolyAcrylic and diluted it 2 to 1 with water. I was asking about the Sanding Sealer because I mistakenly ordered 2 quarts (as part of a larger order) from Woodcraft and I was just looking for ways to use it up. I guess I’ll try and return the 2nd quart. I dont know what I’ll do with the first one because EVERYTHING I do is going to see hard use, water, heat, humidity, oil and acidic spills etc.

So I’m just following Jeff’s advice and using a thinned out top coat for my “conditioner”. Thats what started all of this. I’m trying to control the splotching on some bamboo.

-- Why Bamboo? Because its free lumber. And in the SouthEast anyway, it grows everywhere.

View bambooMan's profile


6 posts in 3125 days

#3 posted 07-08-2010 02:24 PM

Ok, GF replied with this:

“Most people are using a system 3 epoxy for cups, vases, and such. That way you have no issue at all with the items and they are water tight. As far as using our products sanding sealer, high performance, enduro poly, in Kitchens and bathroom vanities it is always best to add our crosslinker to them to give the extra water and chemical resistance that you need for those areas. The Sanding Sealer does have a little Zinc Stearate in it, but minimal amounts which should cause no problem for finishing.”

So I have some system 3 mirror coat which I have not tried yet. I’ll give it a try.

-- Why Bamboo? Because its free lumber. And in the SouthEast anyway, it grows everywhere.

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