Can this be used on area rugs?

Hello from Karcher - The detergents for cleaning rugs is very different than other detergents since they are designed to be vacuumed, not pressure washed.

If the pressure washer dilutes the concentrate 20 to 1, why can't the concentrate be added to the washer directly?

Hello from Karcher - as with many detergents, they are packaged as ready to use or are concentrated and must be diluted to be ready to use. To keep you from buying 20 gallons of ready-to-use detergent, the concentrated version is simpler to store but must be diluted with 20 parts water. Then you fill the pressure washer soap tank with the ready to use (diluted) detergent. The water from the pressure washer is the carrier of the detergent which makes the application of the detergent simpler than spraying a bottle of soap on the wall or car to be cleaned. Further dilution by the pressure washer is already calculated into the mix of soap and water.

Do you simply pour this into the soap dispenser of your pressure washer or do you need to dilute first?

Hello from Karcher - it is highly concentrated and needs to be diluted with 20 parts water to 1 part concentrated soap. Premix this first then pour the diluted solution into the tank. It is very difficult to premix in the tank and this affects how well the soap is applied. Besides, you can keep a premixed amount available ready to use.

Can this / will this clean asphalt shingles roofs?

Asphalt shingles can be easily damaged by a high pressure stream. If you try it be very careful.

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✨ Clean smarter, not harder with Karcher’s powerhouse soap! 🧼

SPEED MEETS EFFICIENCY - Formulated to cut cleaning time on patios, driveways, decks, and more—get spotless faster.
ALL SURFACE VERSATILITY - Perfect for concrete, cars, boats, fences, and outdoor furniture—one soap to rule them all.
PROUDLY MADE IN THE USA - Quality you can trust, supporting local manufacturing and sustainability.
UNIVERSAL COMPATIBILITY - Seamlessly pairs with all major gas and electric pressure washers for versatile use.
ULTRA CONCENTRATED POWER - One gallon transforms into 20 gallons of cleaning solution—maximize every drop!

Karcher's Multi-Purpose Pressure Washer Soap Concentrate is a highly concentrated, fresh-scented cleaning solution designed for all outdoor surfaces. Compatible with most gas and electric pressure washers, this 1-gallon formula yields up to 20 gallons of ready-to-use detergent, accelerating your cleaning tasks while delivering professional-grade results. Made in the USA, it’s the ultimate all-in-one soap for homeowners seeking efficiency and spotless outdoor spaces.

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Product Dimensions	18.42 x 27.94 x 10.16 cm; 3.74 kg
Item Weight	3.74 kg
Specific uses	All-Purpose Cleaning, Car Washing, Fence Cleaning, Siding Washing, Driveway Cleaning, & More
Item volume	128 Fluid Ounces
Is mould resistant	soap free
Scent	Fresh
Is assembly required	No
Batteries required	No
Included components	Accessory
Import designation	Made in US

Karcher - Pressure Washer Multi-Purpose Cleaning Soap Concentrate – For All Outdoor Surfaces – 1 Gallon

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