Natural DIY Wood Sealing Oil – Update | Home, DIY & Stuff

Natural DIY Wood Sealing Oil – Update

September 7, 2013

Stop Wood Mould Naturally with home made DIY wood sealer with natural ingredients.Since writing about making natural DIY wood sealing oil from Vinegar and Canola oil earlier in the year, we have received many questions from readers.

While we indicated that the natural DIY wood sealer protects raw wood from the elements, some DIYers were concerned that the wood sealant formula might encourage mould and rotting of wood.

In our experience, this has not been the case and the sealer generally works well!

While we make no absolute guarantees, our DIY sealing oil applications on raw wood exposed to the elements outdoors have now lasted two dripping wet, extreme high humidity Summers in Japan.  (For those not familiar with Japanese Summers, that is saying something!)

Japanese Summers are notorious for high heat, stagnant moist air masses, and ongoing months of rainfall and storms. Almost any unprotected wood exposed to these sultry outdoor conditions grow mould, moss and fungus on the surface almost immediately. 

Unprotected wood is quickly penetrated by moisture and organic growth.  Wood rot and decay sets in very quickly afterwards, given the chance.  In Winter, the reverse applies.  The Winter cold air is extremely dry; and sunshine is strong and high in damaging UV rays.  Drying and splitting is the primary concern.

With quick half yearly applications of our home made natural wood sealing oil, we have not experienced any noticeable decay or growth on the wood we have treated. Meanwhile, other unprotected wooden items outdoors have been slimed. The items have decayed and fallen apart over the same period.

Our limited use tests are not definitive, but the DIY wood sealing formula certainly seems to work for us.  It revitalizes and protects wood both indoors and out.

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15 Responses to Natural DIY Wood Sealing Oil – Update

  1. September 26, 2013 at 5:57 am

    I’m so glad that you haven’t had rotting–I was a bit worried…

  2. Kristine McElwee
    October 13, 2013 at 1:01 am

    Your detailed article and update are greatly appreciated. The chicken coop requires a natural alternative to paint. Your formula will be applied this weekend. Again, thanks.

  3. October 13, 2013 at 10:59 pm

    Thank you for your comment Kristine. We are glad our post was of assistance and hope the formula works as well for you as it has for us.

  4. Courtney Castaños
    March 25, 2015 at 3:45 am

    Thank you so much for sharing your recipie. I’d love to know how the pine slats are doing now tgat teo years have passed.

  5. May 22, 2015 at 9:59 pm

    Really excited to come across this! We make outdoor furniture and I was searching for a way to use recycled vegetable oil for a wood protectant. However I was finding it would have mold issues. This recipe seems to answer that problem!

    Was wondering how it is still working out for you? Your response would be MOST appreciated. Love the idea of a “green” environmentally safe stain. Thanks for much for sharing this recipe!
    Beth at Southern Country Furniture

  6. May 24, 2015 at 7:31 pm

    Hi Beth. Thanks for dropping by…

    It is a coincidence that you ask this just now. I was just looking at the structure a few days ago and thinking it was starting to look very dry.

    We have not hit it with another coat of natural wood sealer since the first blog. It has been almost two years.

    The surface is now overdue for re-sealing, but it has survived two cycles of harsh Winter and Summer extremes, sitting in both strong drying sunshine and periods of extended rain all that time.
    The exposed wood seems to have survived the weather remarkably well all considered.

    The structure definitely does need another coat now (could have done with it before the last drying Winter) to prevent deeper damage occurring this Summer, but it has still been pretty good going for such a simple DIY wood sealer IMO.

    Unfortunately, the sealer doesn’t protect against cat claws and one of the corner posts of the structure is quite badly damaged and requires re-sanding before recoat, but that is another story…

    Anyhow, I hope this helps.

  7. May 24, 2015 at 7:55 pm

    Hi Courtney. Thanks for your comment and sorry not to get back to you earlier. Yes, it has been almost two years since sealing the pine and the wood is very dry on the surface at present. It has not split, where unprotected wood probably would have, but a re-coat is definitely on the TO-DO list. I doubt it would last another Summer without mould and rain getting into the grain. If I get time, I will try to post on the re-coat “event” as well, so everyone can continue tracking the progress of this natural wood sealer and whether or not it might meet their own needs. For our purposes, it has been a DIY wood sealer which was extremely cheap to make and has done the job well enough. Keep well, stay happy. 🙂

  8. Kelly
    April 1, 2016 at 11:03 am

    Going to try it on my newly installed fence. Do you think using sprayer will work ok with the oil?

  9. April 28, 2016 at 1:40 pm

    We only used a rag or brush. So, sorry, no comment on the sprayer…

  10. Caoimhin Woods
    July 22, 2016 at 5:49 am

    Hi, good to hear a simple, cheap method works. I have quite a bit of used cooking oil. Would this be suitable? I’m going to experiment anyway just wondering if you had tried this. Thanks.

  11. Darryl Barber
    July 28, 2016 at 3:14 am

    Hello Bob

    I had been looking for an affordable and easy/eco oil application for my large cedar deck (here in Vancouver, Canada) for some time now when I read your page with some interest. I, of course, did a bunch of online reading which basically left me at ‘don’t do this because the oil will go rancid and sticky’. It soon became clear that none of these people had ever tried it on even a small section of outdoor wood. Simply no evidence based reports.

    The closer, in terms of trying it on a section of my deck, was my aunt’s 20 year old fir cutting board that has been treated with nothing but crisco vegetable oil and has beautifully survived harsh treatment and much Okanagan direct summer sun through her large kitchen window.

    So I tried it and waited a month. Wood looked great and was totally dry; water beaded up when it rained. Not a hint of rancid smell after a ton of direct sunlight (south facing deck) and no sticky at all. Just completed the entire deck 2 days ago with a roller; took 2 hours total and the cost for 30L of oil and 6L of white vinegar was $50 CDN all in.

    Deck looks killer and is bone dry.

    So, fellow BCers; this works. Takes a little courage though…

    Thanks again Bob

  12. Chip Henry
    March 30, 2017 at 7:56 pm

    I understand that Canola Oil is made using a process of exposing it to hexene gas and we don’t consider it edible in our home. I have to wonder if that isn’t a part of its success.

  13. Alexander
    June 16, 2017 at 9:44 am

    Hello bob, I apreciate very much that you shared this info with us. I have a cuestion. Do you think this can help prevent termites or that kind of wood eater insects? I like your recipe but here in Puerto Rico we have a lot of that type of insects.

  14. Jonathan
    July 3, 2017 at 8:42 pm

    I’ve been using a mixture of cooking oil and diesel on some garden furniture. It soaks in well and after a few days is totally dry. The wood does go slightly darker after use.

  15. September 3, 2017 at 1:05 pm

    Hi all,
    After much research it appears that this oil and vinegar recipe is the one I am going to try. Couple of questions tho, dumb question but I gather its white vinegar is the one to use and not the brown or the white cleaning vinegar?.
    Also I am going to use this recipe for raw pine pellets with the tops being what looks like hardboard. So does this recipe work on hardboard and can I paint the pellets after its dried?.
    Regards and thanks for all the info here. Great site.

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