What to use for Cedar Porch Sealer after mold problems

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Forum topic by SB14 posted 05-10-2016 03:59 PM 497 views 0 times favorited 2 replies Add to Favorites Watch
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1 post in 742 days

05-10-2016 03:59 PM

Topic tags/keywords: cedar porch sealant sealing mold

We built a cedar porch three years ago (we live in VA and the porch is north facing). The builder told us to seal the porch with a mixture of half tung oil and half citrus solvent. We applied that in 2013 and 2014 and now we have black mold all over the wood.

We are now in the process of cleaning the mold off the porch and are trying to figure out the best sealant to use going forward. I am researching many sites online, and there seems to be a lot of disagreement over using oil versus water based sealants. I am concerned that using another oil based sealant will lead to more mold.

Ideally, we would like to use a transparent, water based sealant so we can still see the color and grain of the cedar. Is this viable? And if so, what brands would be best? Or should we go with another oil based sealer?

Thank you VERY MUCH for any help you can provide. Your expertise is greatly appreciated.

2 replies so far

View Aj2's profile


1386 posts in 1794 days

#1 posted 05-10-2016 07:24 PM

There really isn’t anything that will keep you wood looking like it did the first few days after it was built.All wood turns gray in the sun.Oils and wax attract dust and mold. leave it natural.
There are varnishes that can be applied but they are expensive and require constant matinence.Ya know like a wooden boat.
Good luck and go with the flow.

-- Aj

View alittleoff's profile


539 posts in 1272 days

#2 posted 05-11-2016 01:41 AM

I fought mildew for a while on a deck I had and finally gave up. I just washed mine with bleach every once in a while and let it go. I really don’t think they make anything including paint that will stop it completely.


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