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Old 17-11-2014, 14:34   #1
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Thinning Epoxy to Penetrate Wood.

Hi Folks,

I am redoing the timber in the kitchen. What a stupid place to have wood! Anyway, I have stripped the Beneteau urathane and now wish to put a penetrating coat of epoxy on the raw timber.

I have a clear epoxy but its not as thin as I would like.

Do I thin it with Acetone? And how much?

The epoxy is 1:1 if that makes a difference.


Thanks for the advice.



Mark
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Old 17-11-2014, 14:40   #2
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Re: Thinning Epoxy to Penetrate Wood.

Quote:
Originally Posted by MarkJ View Post
Hi Folks,

I am redoing the timber in the kitchen. What a stupid place to have wood! Anyway, I have stripped the Beneteau urathane and now wish to put a penetrating coat of epoxy on the raw timber.

I have a clear epoxy but its not as thin as I would like.

Do I thin it with Acetone? And how much?

The epoxy is 1:1 if that makes a difference.


Thanks for the advice.



Mark
I'd look over at Goudgeon site. That have pretty good info in their quarterly magazines. I remember seeing something there exactly on the subject but can't recall when.
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Old 17-11-2014, 14:43   #3
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Re: Thinning Epoxy to Penetrate Wood.

Here's a link to an article on just that subject.

WEST SYSTEM - Projects - Thinning WEST SYSTEM epoxy
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Old 17-11-2014, 15:02   #4
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Re: Thinning Epoxy to Penetrate Wood.

Reduce with MEK +/- 15%. Follow with coats of neat resin by chemical bond. Be sure to allow sufficient time for the sealer coat to flash off fully before the second coat. Don't use a fast hardener on the sealer coat for this reason. Be sure to heat the substrate before coating. Do not coat a cold wood surface. If it's room temp or better and it cools after coating the wood will draw it in, no heat after coating. Heat lamps are good for this.
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Old 17-11-2014, 15:37   #5
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Re: Thinning Epoxy to Penetrate Wood.

MEK = Mujahideen-e Khalq, the Iranian organization known in English as the People's Mujahedin of Iran




Oh, OK. If it helps the war effort

I will attend the hardware store
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Old 17-11-2014, 15:42   #6
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Re: Thinning Epoxy to Penetrate Wood.

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Originally Posted by minaret View Post
Do not coat a cold wood surface.
I don't think Mark is going to have a problem with too cold of temperatures! Room temp for him is probably 85F...

Mark
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Old 17-11-2014, 15:46   #7
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Re: Thinning Epoxy to Penetrate Wood.

MES = Methyl Ethyl Ketone

There are various 2-pack epoxy products specifically designed for penetrating into timber prior to applying resins or varnishes - these "timber preservers" are generally like a very thin resin. "Everdure" is one of the more well known brands. We use a Wattyl timber preserver which seems to be just as good, but is significantly cheaper.

If you go to a large (trade) paint shop and ask for a 2-part epoxy timber preserver they will almost certainly be able to supply a good local product (can't remember where you currently are anchored).

For what it is worth, I believe that the perceived wisdom is that you can put epoxy resin or varnish over polyester resin, but not vice-versa, so if you use an epoxy timber preserver, you will need to then use an epoxy resin or varnish to finish...
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Old 17-11-2014, 15:48   #8
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Re: Thinning Epoxy to Penetrate Wood.

Quote:
Originally Posted by MarkJ View Post
MEK = Mujahideen-e Khalq
Quote:
Originally Posted by Weyalan View Post
MES = Methyl Ethyl Ketone
Now if you two could just go shopping together, there is a possibility that you will end up with the correct solvent...

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Old 17-11-2014, 16:54   #9
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Re: Thinning Epoxy to Penetrate Wood.

We would use 10% acetone to thin West System epoxy to make it penetrating.
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Old 17-11-2014, 17:36   #10
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Re: Thinning Epoxy to Penetrate Wood.

You'll get some interesting info, as well as recommended products via the following searches online:
"clear penetrating epoxy sealer"
"clear penetrating epoxy sealer Japan Woodworker's Store"
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Old 17-11-2014, 17:52   #11
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Re: Thinning Epoxy to Penetrate Wood.

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You'll get some interesting info, as well as recommended products via the following searches online:
"clear penetrating epoxy sealer"
"clear penetrating epoxy sealer Japan Woodworker's Store"
Yes, but I want "real people advice"


(And I have a,ready searched)
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Old 17-11-2014, 18:22   #12
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Re: Thinning Epoxy to Penetrate Wood.

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Originally Posted by UNCIVILIZED View Post
You'll get some interesting info, as well as recommended products via the following searches online:
"clear penetrating epoxy sealer"
"clear penetrating epoxy sealer Japan Woodworker's Store"
I am a big fan of Smith's Clear Penetrating Epoxy and ALL the new or bare wood on our boat gets two coats of it before being painted or varnished. It goes on very easy, cures in a reasonable amount of time and paint/varnish adheres better. The only problem with the product is that it isn't more widely available.

Clear Penetrating Epoxy Sealer

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Old 17-11-2014, 18:40   #13
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Re: Thinning Epoxy to Penetrate Wood.

Quote:
Originally Posted by Weyalan View Post
.......
There are various 2-pack epoxy products specifically designed for penetrating into timber prior to applying resins or varnishes - these "timber preservers" are generally like a very thin resin. "Everdure" is one of the more well known brands. We use a Wattyl timber preserver which seems to be just as good, but is significantly cheaper.
..........
Everdure used to recommend thinning first coat by as much as 50%, the second coat by 25%, the third by 10% and do the last coat neat. It goes on fast and must be re-coated before previous coat goes off.

The Wattyl product seemed to exactly the same as Everdure except for price
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Old 17-11-2014, 19:05   #14
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Re: Thinning Epoxy to Penetrate Wood.

WEST SYSTEM - Projects - Thinning WEST SYSTEM epoxy

Through knowledge gained from our comprehensive test programs and from 30 years of practical experience, we have learned that epoxy formulation is a balancing act. When one characteristic is altered—e.g. changing handling attributes by adding a volatile solvent—other characteristics like moisture resistance and strength are also changed. Our chemists formulate a well balanced, versatile epoxy that provides excellent structural strength and moisture resistance. If you elect to modify it, you become an epoxy formulator and need to understand the effects of your changes. Armed with the information in this article, you can decide if thinning epoxy is worth the tradeoff in performance.
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Old 17-11-2014, 19:28   #15
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Re: Thinning Epoxy to Penetrate Wood.

Quote:
Originally Posted by MarkJ View Post
Hi Folks,

I am redoing the timber in the kitchen. What a stupid place to have wood! Anyway, I have stripped the Beneteau urathane and now wish to put a penetrating coat of epoxy on the raw timber.

I have a clear epoxy but its not as thin as I would like.
Do I thin it with Acetone? And how much?
The epoxy is 1:1 if that makes a difference.
Thanks for the advice.

Mark
Mark
To do this you also need to have a very thin & very slow epoxy. I have used a lot of US COMPOSITES 635 THIN resin. Reaction is extremely slow and it is thin enough to paint on. Looks good on wood but not UV resistant long haul. You can re-coat with Epiphanes. No matter what you do, the penetration will not be terribly deep. It will provide pretty good cover for water splash.

Epoxy :Â*Epoxy Resins and Hardeners
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