12 Contractor-Tested Recipes

The Right Mix.
Every Surface. Every Stain.

Real-world chemical mixing recipes from working pressure washing contractors. Find the exact ratio, dwell time, and process for the job in front of you.

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Featured Recipes

Safety notice: Always wear PPE, test on a small area first, follow product SDS, and comply with local runoff regulations. User-generated content — not professional advice.

All Recipes(12 results)

Roof with black algae streaks on asphalt shingles before treatment
Official Starter
Featured
Roof

Roof Cleaning — Asphalt Shingles (Soft Wash)

Surface: Asphalt ShinglesProblem: Algae / Mold

Mixing Ratio

1:1 SH to water (50/50 baseline) — ARMA standard

4.9(189)
52287

by Official Starter

Pressure washer cleaning vinyl siding on a residential home
Official Starter
Featured
House Wash / Soft Wash

House Wash — Vinyl Siding (Soft Wash)

Surface: VinylProblem: Algae / Mold

Mixing Ratio

1 part SH 12.5% : 3–4 parts water

4.8(142)
37203

by Official Starter

Rust stained concrete before oxalic acid treatment
Official Starter
Rust & Stain Removal

Rust / Iron Stain Removal — Concrete (Oxalic Acid)

Surface: ConcreteProblem: Rust / Iron Stains

Mixing Ratio

8 oz oxalic acid per gallon of warm water

4.7(76)
18112

by Official Starter

Weathered gray wood deck with algae and oxidation before treatment
Official Starter
Wood Restoration

Wood Deck Restoration — Oxygen Bleach + Oxalic Brightener

Surface: Wood DecksProblem: Algae / Mold

Mixing Ratio

Cleaner: 6–8 oz sodium percarbonate per gallon warm water. Brightener: 8 oz oxalic acid per gallon

4.7(83)
29134

by Official Starter

Oil-stained concrete driveway before degreasing treatment
Official Starter
Concrete / Driveway

Concrete Driveway — General Degreasing

Surface: ConcreteProblem: Oil Stains

Mixing Ratio

4:1 to 10:1 water to degreaser

4.6(98)
21145

by Official Starter

Commercial kitchen exhaust hood with heavy grease buildup before cleaning
Verified
Commercial / Fleet

Commercial Kitchen Exhaust Hood Exterior Degreasing

Surface: Stainless Steel HoodsProblem: Grease Buildup

Mixing Ratio

1:10 light cleaning, 1:5 medium buildup, up to 1:1 direct spray for heavy grease

4.6(33)
948

by Deja W. · Dallas, TX

Brick wall with white efflorescence mineral deposits
Official Starter
Rust & Stain Removal

Efflorescence & Calcium Buildup — Masonry

Surface: ConcreteProblem: Efflorescence

Mixing Ratio

Commercial: 1:1 to 1:12 water. Phosphoric: 1 part acid to 9 parts water

4.5(54)
1489

by Official Starter

Concrete with dark oil stains at a gas station before degreasing
Verified
Concrete / Driveway

Oil Stain Removal — Concrete (Gas Station / Driveway)

Surface: ConcreteProblem: Oil Stains

Mixing Ratio

Hot water: 4:1 heavy oil, 10:1 general. Cold water: 1:1 heavy oil, 4:1–5:1 general

4.5(39)
855

by Marcus T. · Atlanta, GA

Aluminum gutters with black oxidation tiger stripes before treatment
Official Starter
Gutter

Gutter Brightening — Oxidation Removal (Aluminum)

Surface: Aluminum GuttersProblem: Oxidation

Mixing Ratio

10:1 to 20:1 water to product (standard). 5:1 for heavily oxidized gutters

4.4(61)
1578

by Official Starter

Exterior wall with green algae and black streaks before treatment
Official Starter
Algae / Mold

Algae & Black Streak Removal — General Exterior

Surface: SidingProblem: Algae / Mold

Mixing Ratio

1–2% SH on surface, held wet 5–10 minutes

4.3(47)
1167

by Official Starter

Masonry wall with spray paint graffiti before removal treatment
Official Starter
Graffiti

Graffiti Removal — Masonry & Painted Walls

Surface: MasonryProblem: Graffiti

Mixing Ratio

Per product label — most graffiti removers are ready-to-use or lightly diluted

4.2(22)
731

by Official Starter

Vinyl fence with green mildew and mineral staining
Official Starter
House Wash / Soft Wash

Vinyl Fence — Mildew & Mineral Deposit Cleaning

Surface: Vinyl FencingProblem: Mineral Deposits / Mildew

Mixing Ratio

Vinegar: 1:1 water to white vinegar. SH option: 0.5–1% SH on surface

4.1(28)
641

by Official Starter

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