Outdoor Cedar Finish - Weathered / Mold and Mildew Resistant - Woodworking Talk - Woodworkers Forum
 
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post #1 of 2 Old 07-05-2015, 06:04 PM Thread Starter
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Outdoor Cedar Finish - Weathered / Mold and Mildew Resistant

I have a new cedar railing on a deck and had intended to treat it with zinc napthenate to get a silvery finish that also discourages mold, etc. But it seems that zinc napthenate has gone the way of DDT, etc. and nobody sells it any more. Well, one can presumably buy a kg. of the powder/crystal form but at $650/kg that seems unlikely to happen. What I'd figured to be good would be 6-8% solution (but in what solvent??). Probably moot.

So, I'm looking for something else.
I find Cabot bleaching oil that promises a similar finish but it's based on linseed oil. Linseed oil is food for mold.

I'm stuck on what I might use that's not linseed oil based (to avoid mold/mildew in a damp coastal location) and will get a gray/silver result and avoid much maintenance.

I'd appreciate suggestions!
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post #2 of 2 Old 07-05-2015, 08:41 PM
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antifungal coating for a deck

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Originally Posted by fred3 View Post
I have a new cedar railing on a deck and had intended to treat it with zinc napthenate to get a silvery finish that also discourages mold, etc. But it seems that zinc napthenate has gone the way of DDT, etc. and nobody sells it any more. Well, one can presumably buy a kg. of the powder/crystal form but at $650/kg that seems unlikely to happen. What I'd figured to be good would be 6-8% solution (but in what solvent??). Probably moot.

So, I'm looking for something else.
I find Cabot bleaching oil that promises a similar finish but it's based on linseed oil. Linseed oil is food for mold.

I'm stuck on what I might use that's not linseed oil based (to avoid mold/mildew in a damp coastal location) and will get a gray/silver result and avoid much maintenance.



I'd appreciate suggestions!



I know that when I lived in a coastal area once, there were compounds similar to the copper green solution that I can't buy here inland anymore which were for marine applications, so maybe check out a marine supply company? I think the product was called Coppertox or something like that, but it seemed to be what you find in treated lumber. General Finishes make a very good water basedCedar finish. And they have some very strong clears.
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