How to Paint over Mould & Mildew

In today's video I'm going to show you an incredibly effective way to eradicate mould & mildew - with Zinsser B-I-N and Zinsser Perma White.

Useful Links

Today's Toolkit*
UK Products (for US see further below)
- 9 inch Fat Hog Roller and Quick Release Extension Pole - from Johnstones' Decorators Centre

US Products

* The Amazon links above are affiliate links. It doesn't cost you anything to click on them but I do earn a small commission if you do.

And here's the legal bit I have to state: As an Amazon Associate I earn from qualifying purchases.

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LET'S CONNECT!
Charlie DIYte

#mould #Zinsser #mildew

[toolmanthetim]

i bought some mildew remover, it said on the label to use only in a well ventilated area.
if it was a well ventilated area, there wouldn't be any mildew.

[AccountantDoesDIY]

Used 123 and permawhite for my garden gym that I built during lockdown. Straight onto plasterboard. Two years later and it’s still perfect. Very impressed as its in a shady damp bit of the garden.

[murdermysterymissing]

I am glad you mentioned the mask. I had a room once that had lots of mold due to water leaking under a wall. I fixed the drainage issue, but when I cleaned the room, being a risk taker, I took a broom and just swept it off. You could literally see the particles cloud the air. I then painted the room, but before I could finish I got big holes in my tongue and was very sick. Mold tried to grow in my mouth. It was extremely painful and I was down and out for a couple of weeks before I could finish the paint. The good news, it has been 15 years since, and there has not been any more mold in the room, so just sweeping it away and painting it was enough.

[Petertronic]

Other brands are available! I've used the Polycell mould killer for years - and never had mould return where I've applied it. Excellent and useful video!

[budte]

I qualified as a house painter over 40 years ago and worked at the high end. All you need is to apply thinned bleach, let it kill the mould (standard trained house painters practise). Wash it off. Let it dry. Seal with a thin coat of oil-based undercoat if it is stained, then paint over as normal. Zinsser bin is a marvellous paint for some problems, but not necessary for mould. It is also a rigid paint and NOT an ideal primer for everything, especially new wood. Mould will often return when the warm interior air hits a cold outside wall. Sometimes a thermal lining paper might help or a portable room dehumidifier. The same with water stains after a leak. No need for nonsense primers. Once the leak is fixed and dried out, seal the stain with thinned ordinary oil-based (not water-based) wood undercoat. Applying with a cheap throwaway 4 inch foam roller is preferable to avoid thick coats and brush marks. Brush cleaner wrecks brushes and no professional painter I have ever known would use it. You stop your oil-based brushes from drying by keeping them in water and then wiping the outside dry when you want to reuse them. Painters mate box are also very good.

[Napoleon-Blownapart]

Had mold on toilet plaster board wall. Used HG Mold remover and then used Zinsser Gardz to seal and harden the board after cleaning. Painted over with Dulux Easycare. All good a year later.

[carpii]

Ive tried a lot of mould products, but the best Ive found is HG mould remover foam spray. Its amazing stuff and the foam makes it easier to use than a thinner spray. Ronseal also do an anti mould paint in transparent, which is handy if the existing wall is not white

[ricksanchez]

I hold mould in my bathroom, scraped all old paint and mould off and painted with mould proof paint. 8 years later the ceiling is still perfect.

[mattbandura]

Awesome video but the real test would be checking same spot after a year or two to see if mould returned

[danielethier]

Thanks kindly for all of your hard work and dedication Charlie.
20+ years in the business and am a big fan of Zinsser products when tough approaches are needed.
I've also used alkyd primer with outstanding results..under different situations!
I advice all who wish to treat wood prior to painting to use shellac base BIN(not water base) as it truly avoids future bleeding.
Outstanding content!!
Greetings from Canada

[tonydampworks]

Charlie, well done its a good video and will help those suffering from the effects of condensation, and yes the Zinsser shellac sealer stain block is close to awesome on condensation mould and on salt damp affected chimney stacks. only other thing to add is ensure anyone doing the works, opens the windows and doors to ventilate and aid drying times reducing any airborne odours or moulds

[amyjorgensen]

I came here looking for tips for repainting my bathroom and got unexpected tips for how to fix up my dad’s flat when he moves out, can’t get him to stop smoking inside! Thank you for all the info

[nickyscott]

HG MOULD CLEANER is my go to product....fantastic results....mould disappears once treated/sprayed. 👍

[robbiepilot]

Thanks very much Charlie, used your suggested method and materials to treat mould round some window areas where there had not been enough ventilation during the winter months. You are certainly right about coverage of stains etc by the Zinsser!

[alwayscurious]

great video - very helpful for us DIY'ers who need things spelling out - looks like good product too. Helpful also to see your brush cleaning approach - I do the very same with sets of containers of older cleaner used to get rid of the bulk of the crud followed by a last stage clean with the neat solution (that then gets tipped into the reservoir.) Everyone does this differently so great to see at least one approach made clear.

[gordonalbert]

Bravo! great demonstration on proper mold abatement and proper mold resistant painting. Good job!

[thebushyone]

Hi Charlie, really think you should do a video on general painting practices. i.e. where to start (ceiling, walls, etc). How to do edges, skirting board.. With lockdown, a lot of people are currently do a lot of painting jobs. I was painting the other day and the wife asked me why I was painting the ceiling first. Some people just don't know where to start.

[CharlieDIYte]

Apologies to anyone who watched this video yesterday. I took it down to tweak it in a couple of places - following some valuable pointers from Lee (see below) to better emphasise a few important safety measures you should take when treating mould (or mold in the States).

[kestrelnetchemu]

Hi Charlie.. Thank you so very much for the wonderful videos you make.. sooo helpful.. I have a very small poorly ventilated bathroom with unsealed plaster.. Unfortunately the plaster has been bare for some considerable time and has mould growing on it.. Please can you tell me what I need to do to seal it so that the mould will not come through..the walls will be painted not tiled..( unless tiling is the best way forward).. If you have already covered this topic what is the title of the video please.. Thanks again.. Kes

[alicedunstan]

Got a tip from a friend and I used old bleach (3+ years old one 2y after expiration date). It removed the mold but the bonus was no bad bleach smell at all. Fresh bleach has strong chlorine smell this old one does not smell at all and it still works against mold.