Choosing the right detergent can dramatically improve results when pressure washing concrete. This guide highlights five top-rated cleaners, spanning heavy-duty degreasers to mold- and mildew-fighting formulas. Each product is designed to lift oil spots, rust, algae, and grime from concrete, driveways, and related surfaces. Compare concentration, compatibility, and odor to pick the best option for your project and equipment.
Summary of selected products:
- Simple Green Oxy Solve Total Outdoor Pressure Washer Cleaner – 1 Gal (Cleans multiple surfaces, peroxide-powered, lifts mold and mildew)
- Kärcher Multi Purpose Pressure Washer Detergent – Highly concentrated, up to 20 gallons per bottle, versatile for concrete and more
- SIMpson Cleaning 88282 Cleaner – Heavy-duty, non-butyl degreaser, dilutable for up to 256 gallons
- Oxy Solve House and Siding Pressure Washer Cleaner – Exterior-focused, removes mold/algae on siding and brick
- Simple Green Oxy Solve Concrete and Driveway Pressure Washer Cleaner – Purple formula, targets driveways and patios
Simple Green Oxy Solve Total Outdoor Cleaner
Brand: Simple Green Store
Features: Cleans a wide variety of surfaces such as wood, composite, vinyl, metal, fabric, plastic, wicker, concrete, stone, brick and asphalt. Lifts dirt, grime and stains from mold, mildew, moss and algae. Uses the power of peroxide to lift grime without harsh chemicals. Formulated for outdoor use with pressure washers.
Kärcher Multi Purpose Pressure Washer Detergent
Brand: Karcher Store
Features: Universal compatibility—formulated to work with most consumer gas and electric pressure washers. Highly concentrated, making up to 20 gallons of cleaner from a single gallon. Clean concrete, pavement, driveways, patios, decks, sidewalks, RVs, cars, boats, homes, fencing, and more. Quick cleaning capabilities with fewer applications required.
SIMpson Cleaning 88282 Cleaner
Brand: SIMPSON Store
Features: Heavy-duty cleaner designed for industrial sites, commercial equipment, and construction machinery. Non-butyl degreaser quickly cuts through tough oil and grease. Versatile use in pressure washers, automatic scrubbers, steam cleaners, or manual applications. Highly concentrated, providing up to 256 gallons of cleaning solution per bottle and effective at dilutions as great as half-ounce per gallon.
Oxy Solve House and Siding Cleaner
Brand: Simple Green Store
Features: Cleans house siding including vinyl, aluminum, stucco, wood and brick. Removes stains and discoloring from algae, moss and mildew. Uses peroxide to lift grime without harsh chemicals. Particularly effective for exterior surfaces prone to weathering and organic growth.
Simple Green Oxy Solve Concrete And Driveway Cleaner
Brand: Simple Green Store
Features: Specifically targets driveways, walkways, patios and masonry. Eliminates tough oil stains, rust stains, grease, automotive fluids, tire marks, exhaust buildup and more. Uses peroxide-based chemistry to lift grime without harsh chemicals, reducing odors and residue on concrete surfaces.
Buying Guide: Key Purchase Considerations
When selecting a detergent for pressure washing concrete, consider surface type, stain severity, and equipment compatibility. Heavier grease and oil may require a non-butyl degreaser or concentrated formula to minimize scrubbing. For large driveways and frequent jobs, concentrate-based products that yield more gallons per bottle can reduce cost per usage. If you’re cleaning siding, brick, or masonry in addition to concrete, choose a versatile cleaner designed for multiple exterior surfaces. Peroxide-based formulas generally lift grime effectively without harsh chemical residues, which benefits both safety and environmental impact.
Additional considerations include: dilution ratios and application method, fragrance or odor, surface safety (et cetera), and whether the product is safe for use around landscaping or pets. Always follow label directions for dilution, contact time, and rinsing requirements. For concrete with oil stains, look for products specifically formulated to break down and emulsify hydrocarbons. Finally, verify compatibility with your pressure washer’s pump and nozzle system to maximize efficiency and minimize foaming or overspray.
Summary guidance for choosing among the five options: For broad outdoor cleaning with minimal effort and wide surface compatibility, Simple Green Oxy Solve Total Outdoor and Oxy Solve Concrete and Driveway cleaners offer peroxide-powered lifting with relatively gentle formulations. For heavy-duty, industrial-scale needs or severe grease, SIMPSON’s cleaner provides high dilution flexibility and maximum cleaning solution yield. Kärcher’s detergent emphasizes high concentration and broad use across many surfaces, making it a solid all-around choice for frequent users. For siding-focused projects, the House and Siding cleaner targets exterior growth and staining effectively, while the concrete-focused formula from Simple Green targets driveways and patios with a purple, unscented option.