Add 3 4 cup of household bleach or vinegar to each gallon of water if needed.
Bleach on aluminum siding.
Add bleach or vinegar if your siding shows any signs of mildew.
Bleach will not cause immediate corrosion or bubbling on aluminum foil or an aluminum surface.
Make sure the aluminum siding is still wet from the rinsing step.
Spray down the siding with plain water from the garden hose.
Use a high pressure nozzle on the garden hose to remove loose dirt and debris.
With the ryobi chemical sprayer you just pop in a battery and turn it on.
Let the cleanser sit for a couple minutes before scrubbing.
It s not uncommon to have a mildew problem on aluminum siding depending on where you live.
Trisodium phosphate is powerful so be cautious.
However bleach can change the color of the metal.
Spray this mixture on remaining spots.
If mold or mildew is the culprit spraying with a bleach solution will remove it.
The bleach is not strong enough to eat away at the metal.
If cleaning siding manually dilute 1 5 cups of the concentrate in 13 5 cups.
Fill the bucket with hot water and a biodegradable detergent according to the product s label.
After some time the aluminum surface may darken or even turn black.
Use the sprayer wand to evenly disperse the tsp mixture all over that section of siding.
Step 6 rinse off the siding with a hose and water.
Clean the aluminum siding with a sponge dipped in the water bleach solution.
Step 4 fill a clean empty garden sprayer with a chlorine bleach and water mixture.
To clean aluminum siding having mildew use a solution of one part bleach and four parts water.
Remove mold from aluminum siding with borax banish light mildew mold and chalky build up from aluminum siding by cleaning with trisodium phosphate or borax.
Scrub as hard as possible without buckling the aluminum.