30 SECONDS Outdoor Mold & Mildew Stain Remover | Concentrate | 128 fl oz | Vinyl Siding Fences Patios & More | 4 Pack

Amazing, just spray it on and wash it off.

I recently tried the 30 SECONDS Mold & Mildew Cleaner & Stain Remover Concentrate, and I am thoroughly impressed! This product does exactly what it promises: it quickly tackles mold and mildew stains, leaving surfaces looking fresh and clean. The gallon size offers great value, and the concentrate goes a long way when mixed with water.I used it on my bathroom tiles and grout, which had accumulated some stubborn mold over time. After applying the solution and letting it sit for a few minutes, I scrubbed lightly, and the stains were gone! It also worked wonderfully on my outdoor patio furniture and deck, removing mildew without any harsh chemicals or strong smells.What I appreciate most about this product is its ease of use – it doesn’t require any scrubbing or harsh rubbing to get great results. The cleaner worked quickly, and there were no leftover residues.Highly recommend for anyone dealing with mold and mildew. It’s an effective, no-fuss solution that saves both time and effort!

I bought five gallons in November of 2020. I used two gallons in 2020. The other two gallons were kept in the garage through cool winters and blazing hot summers. I just used the third gallon today (August 2025) and the product worked like new. So, this product can be kept a long time.

This was the best cleaner I tried after using several general cleaners I had. First, my patio was partially black and green mold from years of neglect. I saw some improvement in a few minutes and let it sit longer. Sprayed back over the bad spots again and let it work longer before rinsing. After rinsing, there was significant improvement. I ordered another gallon to clean the patio again and use on my front sidewalk and pavers before sealing. I do recommend, obviously, since I ordered more. My patio was bad, so if yours isn’t as bad it would work better.

I’ve seen this product for years but never used it. I decided to try it on my deck spindles, areas on my deck where I didn’t want to use my pressure washer as that can remove my stain . It works well with a bit of scrubbing after application then hose off . But watch the mix , no more than a 1:1 mix , even a bit more water to dilute .

This stuff really works!

Why did you pick this product vs others?:I chose this product because of the good reviews and I’m very happy to report that they are all legit. I sprayed this lightly on the surface of the deck, waited about 20 minutes, and it was the easiest and lightest pressure washing I’ve ever done. For the north facing wood steps it took a couple of coats and a scrub brush, but they look like almost new! It also worked on algae growing on bricks and an outdoor concrete countertop.

Cleans well enough, bought for grime and black mildew on white pvc fence. What description does NOT tell you is it has bleachlike qualities. Spray bottle left white ring on landscape timber, blue work pants got all kinds of bleached out spots. Description page should be clear about the product's bleaching tendencies.