can I use the 30 second cleaner on my shower walls

I would NOT use it in the house as it's designed to be used outdoors. Thus the name - outdoor cleaner.

So is this 4 gallons 4 quarts

Thanks for your question! This is for 4 bottles of 1 gallon each. So you will receive 4 gallons total.

Can this be used on a sealed flagstone pool patio?

I used it for my house. And it worked well. I’m sure it’ll do wonders for the patio as well

I sprayed over this thing on the roof. it did clean, although i had to brush off moss. however, it is showing yello after application. is it expected?

To kill moss on your roof shingles mix 1 gallon of bleach, 1 gallon of water, & 1 cup of dawn dishwashing detergent. Spray it on and let it sit with no chance of rain. Shingle manufactures recommend it. I’m sorry I don’t know about the yellowing.

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30 SECONDS Outdoor Cleaner Dirt,Mold & Mildew Cleaner & Stain Remover Concentrate | 1 Gallon

30 SECONDS Outdoor Cleaner Dirt,Mold & Mildew Cleaner & Stain Remover Concentrate | 1 Gallon

Product ID: 1911930

Details

Brand
30 SECONDS
Item Form
Spray
Material Feature
Biodegradable
Scent
Wood
Specific Uses For Product
outdoor

🌿Plant & lawn safe biodegradable

🧴1:1 concentrate mix ratio

⏱️Cleans in 30 seconds

Description

✨ Clean Fast, Live Fresh — Outdoor surfaces renewed in a flash! 🌿

RAPID STAIN ERASER - Blast away mold, mildew, dirt & grime in just 30 seconds—no scrubbing needed.
ECO FRIENDLY FORMULA - Biodegradable and safe for plants and lawns, so your clean space stays green and guilt-free.
TRUSTED TOP RANKED - Join thousands of satisfied pros with a #4 best seller in Moss Control and 4.4-star rating.
EFFORTLESS CONCENTRATE - Mix equal parts with water for a powerful, ready-to-use cleaner that saves time and money.
VERSATILE SURFACE SAVIOR - Perfect for decks, concrete, vinyl, siding, and more—see immediate results on all your outdoor surfaces.

30 SECONDS Outdoor Cleaner is a powerful, biodegradable concentrate that removes mold, mildew, dirt, and stains from a wide range of outdoor surfaces in just half a minute. Safe for plants and lawns, it mixes 1:1 with water for easy application and delivers immediate, no-scrub results on decks, concrete, vinyl, siding, and more—making it a top-rated choice for professional-grade outdoor cleaning.

Specifications

ASIN	B000VRQSIK
Best Sellers Rank	#1,620 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #2 in Moss Control
Brand	30 SECONDS
Brand Name	30 SECONDS
Customer Reviews	4.4 out of 5 stars 4,485 Reviews
Global Trade Identification Number	00040235751285
Included Components	1 Bottle
Item Form	Spray
Item Type Name	30 SECONDS Outdoor Cleaner, 1 Gallon - Concentrate
Item Volume	5000 ml
Manufacturer	Collier
Material Feature	Biodegradable
Material Features	Biodegradable
Model Number	1G30S
Number of Items	1
Part Number	1G30S
Scent	Wood
Size	128 Fl Oz (Pack of 1)
Special Features	Concentrated
Specific Uses For Product	outdoor
Surface Recommendation	Concrete,Vinyl,Wood
UPC	040235751285
Unit Count	128 Fluid Ounces

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