Sandstone Cleaner

[Lannatyne]

There's a great Aussie product called "Wet & Forget" to clean sandstone with. Anyone know if you can buy that here?

If not, what are your preferred options for cleaning the mould? Would prefer not to use Hydrogen Peroxide for environmental reasons.

[iSabai]

For mold and/or mildew I'd use regular bleach. Wouldn't worry about the environmental effects, if any were to leach into the sea (highly unlikely and harmless at that strength) it would probably do more good than harm.

[barka]

bleach is as good as most products,chlorine works well to but have to wear safety wear...most acid based cleamers work,but bleach is the most freindly..

[Delighted]

Agreed. Dilute the bleach and use a spray bottle. Best if done out in the sun. Let dry between applications.

[FlyByNights]

If you put a good sealer on your sandstone, a hire pressure water gun would work good. Just don’t get to close when cleaning the sandstone, you will damage it if you do. Hot water and pressure spray. Make sure to keep your distance

[barka]

If you put a good sealer on your sandstone, a hire pressure water gun would work good. Just don't get to close when cleaning the sandstone, you will damage it if you do. Hot water and pressure spray. Make sure to keep your distance

i have used sealer etc on sandwash before ,good expesive ones,but i have found the cheapest and most easiest is good ordinary bleach with a good stiff yardbrush,you dont have to rinse it the rain will do it...why waste money.. and also safe..

[FlyByNights]

If you put a good sealer on your sandstone, a hire pressure water gun would work good. Just don't get to close when cleaning the sandstone, you will damage it if you do. Hot water and pressure spray. Make sure to keep your distance

i have used sealer etc on sandwash before ,good expesive ones,but i have found the cheapest and most easiest is good ordinary bleach with a ,you dont have to rinse it the rain will do it...why waste money.. and also safe..

Most people own pressure guns, so no cost involved except the water. Pressure spray...a hell of a lot easier than using a good stiff yard brush.

[barka]

If you put a good sealer on your sandstone, a hire pressure water gun would work good. Just don't get to close when cleaning the sandstone, you will damage it if you do. Hot water and pressure spray. Make sure to keep your distance

i have used sealer etc on sandwash before ,good expesive ones,but i have found the cheapest and most easiest is good ordinary bleach with a ,you dont have to rinse it the rain will do it...why waste money.. and also safe..

Most people own pressure guns, so no cost involved except the water. Pressure spray...a hell of a lot easier than using a good stiff yard brush.

ONE THING ABOUT THE BRUSH,YOU GET SOME EXERCISE,and the sandwash is not harmed by exesive use of the pressure washer

[steelepulse]

Are we talking about sandwash or sandstone? Sandwash is the common covering for concrete, while sandstone is quite often 40 X 80, 30 X 60 tiles. I would think both could have bleach used on them to kill mold, algae etc.

[katabeachbum]

Are we talking about sandwash or sandstone? Sandwash is the common covering for concrete, while sandstone is quite often 40 X 80, 30 X 60 tiles. I would think both could have bleach used on them to kill mold, algae etc.

sandwash barely needs chlor, a simple 80bar/250 liter pressure washer does it, slowly tho with this little power and water

however my 130 bar/660 liter washer is broke again, so I did my pools sandstone edge with chlor and pressure wash 80bar/250liter, and they did not get really clean.

sandstone brick walls it worked ok

any suggestions?

[Lannatyne]

Agreed. Dilute the bleach and use a spray bottle. Best if done out in the sun. Let dry between applications.

What dilution proportion would you suggest?

Despite my initial environmental reservations, I've noted what's written here, and got some bleach. What next?

[stevehaigh]

i've found 25% hydrochloride acid solution works well on my sandstone, makes it look shiny and new and takes out stains, especially cement stains, very well. then pressure wash after