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"Mould on MDF" Topic

7 Posts

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639 hits since 11 Oct 2017
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Comments or corrections?

gbowen11 Oct 2017 6:25 a.m. PST

Is it me, what have I done? A paddle boat in a filing cabinet, covered in it. Block house and palisade in a wooden box. Block house fine but palisade in a bad state. The mould does come off. I am using wilkinsons floor stain and acrylic type paints. Some areas are just stain, no paint. Some other MDF models seem OK butI have not checked everything

Personal logo StoneMtnMinis Supporting Member of TMP11 Oct 2017 7:44 a.m. PST

Mold requires moisture and usually darkness. However, it doesn't spring-up all by itself, so the mold spores were either present in the storage container or somehow in the mdf itself.

I'm not sure how or even if you can treat it on mdf. I would suggest contacting a mdf manufacturer and seeing if they can provide some assistance.


Personal logo Andrew Walters Supporting Member of TMP11 Oct 2017 9:36 a.m. PST

Clean it carefully in a "well-ventilated" space, inhaling mold and spores is bad.

There is water in a lot of the products you used making these, some of it got trapped under your outer coat and grew.

There are mold spores everywhere. It takes *great* effort to get rid of them all. You have to deny them the conditions they like. I'm not sure what you should have done differently.

When I use MDF, I make sure to cover every side and edge, even those that are not visible. Moisture can sneak in and cause warping, even if you don't get mold.

Share whatever you learn!

Ragbones Supporting Member of TMP11 Oct 2017 2:07 p.m. PST

Wow, never heard of that before. Another reason to be glad the game room is coming out of the basement soon. I hope you're able to salvage your stuff.

wrgmr111 Oct 2017 3:38 p.m. PST

Any mold I encounter around the home, sometimes in window sills after a long wet winter, I use hot water and bleach to kill the mold.

My suggestion would be use straight bleach, outside. Put a small amount on a cloth and rub it over the effected areas. Do not soak the MDF. The problem with bleach is it will discolor anything you put it on, so you will have to repaint.
I would bleach, coat with white glue or spray paint with a gloss coat and repaint.


Early morning writer12 Oct 2017 11:50 p.m. PST

Never had a problem with mold on any terrain piece, building or otherwise. Maybe because I stick with resin and avoid MDF. Just another reason not to like MDF.

Personal logo Bowman Supporting Member of TMP14 Oct 2017 5:30 a.m. PST

Mold requires moisture and usually darkness

You're only half right. Mold, like most micro organisms, require moisture and a food source for growth. It's not that darkness is a requirement for growth, it's that mold doesn't require sunlight for photosynthesis. Mold will happily grow in darkness, but also on well lit windowsills, as wrgmer1 states.

Mdf is basically wood fibres held together with a resin based binder. The wood is made of cellulose which is a sufficient food source for the mold.

Clean and dry your storage containers (bleach is your friend), and totally seal your mdf so that the wood fibres are not exposed to moisture and spores. You should be fine.

Next, find out the source of the moisture and try to minimize it.

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