That's awesome what is it.

Bleach, just bleach, we do it every year. Then you do the old timers seal, diesel and old motor oil, 50/50 mix and paint, or spray it on. gives a nice country look and the wood bees won't burrow into the wood. Your welcome.

Incredible.

Likely oxalic acid - "wood bleach"

WoW.

Pretty common for cedar siding, especially in coastal areas.

Fantastic.

It's a 50/50 mixture of pool chorine and water, I use it all the time.

Nice.

@robertdunlap947 Bleach! I can smell it

@robertdunlap947 Ok.

Very strong bleach; probably 30%

Awsome.

I just discovered this. Was powerwashing a dock and was having to spray in 2" passes. Bought this at a hardware store (Ace) and I could have rinsed withna garden hose. It also took mold out of the wood fibers in a composite rail.

I used to make a finish out of apple cider vinegar and fine steel wool put them together let the steel wool dissolve. Its makes to wood look aged.

Awsome.

If you mess with wood try it

Used it last year for first time My 27yo Deck looked like brand new wood..Bleach washed and stain every 3-4 years but never look as good as with these.

@DangerousThinkg Strong bleach or liquid pool shock.

@DangerousThinkg Alright.

Oxalic acid. All of the "pool bleach" answers are wrong.

@RickD_GK It is pool chlorine that does that .

@GregorioSh64773 @RickD_GK WoW.

@Gitmo99 Something you don’t want to drink.

@Gitmo99 Yep.

household bleach

Right.

Sodium hypochlorite and lemon scent, typical softwash solution

@RL9631 “Wet And Forget” will do the same thing, only takes longer and is completely non-toxic.

I live in Colorado, so don't have mold and mildew issues. I need to find a good sealant for cedar posts to protect from the harsh sun.

@drag0nmaster17 Chlorine maybe

@2025DJT2025 RMR 86 industrial bleach.

Do not do this on painted surfaces... PSA.

The tannins in wood & iron in water/dirt make wood turn black or gray. Oxalic acid will bleach out the black/gray color but not the wood color. Conversely if you have new wood and want it to look weathered gray. Use white vinegar and breakup steal wool in it, spray or brush on.

@lynnek2005 Cool result, but the risk is uneven color, rougher grain, and the wood turning gray again if it is not protected after, but great for a quick restoration. After applying, let it dry fully, then seal or waterproof it so the reset lasts longer.

This is swimming pool chlorine, either straight or diluted. I have used this method myself.

Probably Thompson's

If this was Ghost's fence door, Ghost would use Oxalic acid. 30g in 500ml of water would be the perfect solution.

bleach?

TSP

Clorox and distilled water mixed in equal parts. Does the trick every time. Then, after it is completely dry; mix some used motor oil and some diesel and use it to give it a poor man's seal/wood stain and you are set for a whole year.

@MAGA__Patriot Sodium hypochlorite…otherwise known as liquid pool shock diluted to about 3%, or very strong bleach.

There is industrial bleach you can buy at Lowe's. I've used it on moldy wood siding etc. Works great

It causes cancer in California if you drink it or bath in it.

@9NewsNancy Common household bleach killing mildew and mold that grows on wooden fence pickets

@truth_teller58 Round Up! Cancer tool sold in stores.

@its_The_Dr Bleach