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30 SECONDS

30 SECONDS Outdoor Cleaner, 1 Gallon Concentrate for Concrete Surfaces, Cleans Algae, Mold, Mildew Stains

Name: 30 SECONDS Outdoor Cleaner, 1 Gallon Concentrate for Concrete Surfaces, Cleans Algae, Mold, Mildew Stains
Brand: 30 SECONDS
SKU: 38471822
Price: 11.96 USD
Availability: InStock
Rating: 4.5 (2743 reviews)

2,743 ratings

30 SECONDS Outdoor Cleaner, 1 Gallon Concentrate for Concrete Surfaces, Cleans Algae, Mold, Mildew Stains 30 Seconds Concentrated Outdoor Cleaner 1 gal 2 pack 30 SECONDS Outdoor Cleaner Cleans Stains Caused by Algae Mold and Mildew 1 Gallon Concentrate

Multipack Quantity1

Key item features

Organic Stain Removal: Effectively cleans stains caused by organic growth such as algae, mold, mildew, dirt, and grime from various outdoor surfaces.
Concentrated Formula: Features a powerful, easy-to-use concentrated formula that requires a simple 1:1 mix ratio with water, then spray on and hose off.
Extensive Coverage: A single gallon of concentrate provides significant coverage, cleaning up to 200 square feet on porous surfaces and up to 600 square feet on nonporous surfaces.
Immediate Surface Results: Delivers immediate cleaning results on a wide array of outdoor surfaces including decks, concrete, bricks, siding, canvas, and painted surfaces.
Versatile Outdoor Cleaning: Suitable for cleaning virtually anything outdoors, including wood decks, gutters, stucco, patio furniture, canvas awnings, and vinyl fences.
Surface Preparation Aid: Ideal for preparing surfaces before painting, staining, or varnishing, ensuring a clean base for optimal results.
Plant-Safe Application: Designed to be safe for plants and grass, preventing harm during the cleaning process.

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Customer ratings & reviews

4.5 out of 5 stars

stars

2,743 ratings1,081 reviews

How item rating is calculated

Reviews summary

Pros

: Quickly removes dirt and grime from surfaces.
: Requires minimal effort for effective cleaning.
: Offers lower prices than similar retailers.
: Quickly removes dirt and stains from decking surfaces.
: Quickly removes mold and mildew from surfaces.

Neutral

: It removes mildew but can miss or even bleach some stains.

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Showing 1-3 of 1,081 reviews

Sep 27, 2026

Reviewer name: jamie

Top Reviewer

Item details

Multipack quantity: 1

5 out of 5 stars

5 out of 5 stars review

Verified Purchase

Wonderful deck restorer

Works very well. Used to revive the wood on a deck that was weathered and had some mildew. Just sprayed it on and in just a couple of minutes rinsed it off. Wood looks good as new. It is pretty strong though, and with that is some odor (not terrible) and would not want to use it in too much wind. I wouldn't want to get it on your skin. It did over spray on grass and some plants that I didn't move far enough away but it didn't seem to bother them. Five Stars for the project that I did. 🌟🌟🌟🌟🌟

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Oct 15, 2026

Reviewer name: Debbie

Item details

Multipack quantity: 1

5 out of 5 stars

5 out of 5 stars review

Verified Purchase

Cleans siding without pressure washing

This stuff is amazing for cleaning our white siding. No pressure washing needed. Let it stay for several minutes depending on the amount of mold and mildew you are trying to clean. I did not have good results trying it in our concrete walkway. But it definitely made life easier cleaning the upper story of our house.

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Oct 11, 2026

Reviewer name: Alientek

Item details

Multipack quantity: 1

5 out of 5 stars

5 out of 5 stars review

Verified Purchase

Excellent outdoor cleaner

This 30 second outdoor cleaner is fantastic. I've used it on siding, roof shingles and even concrete floors in my garage. Be careful with this product as it is caustic and will ruin your clothes and burn your nose. I've purchased it 3 times and would recommend it to anyone.

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