30 SECONDS Outdoor Cleaner, Hose End Sprayer, 2 Pack,Mold & Mildew Cleaner

I bought to bottles to do cleaning of external walls around my house. I found it extremely effective on algae, turning the algae from green to brown/yellow very quickly which I take is a good sign that it’s killing the algae, making it easy to subsequent removal. I also used it to clean mouldy walls and it was also very effective. The bottles came with a hose attachment but it wasn’t compatible with my tap fittings as I am not in the US. However, I poured the solution into a handheld sprayer and sprayed the walls by hand and it worked well. Although you can hose off the solution with a garden hose, I recommend waiting a few minutes for the solution to work and then use a high pressure water hose. Wear a mask as it does give off some fumes. Worked well and I would recommend its suitability as described.

Product does a super job on vinyl siding. I am very pleased with results. It does take a lot of product to do a house .

I generally don’t write reviews, but once in a while you come across a product that works so well it practically forces you to write one. ❤️ This is definitely one of those products! I used 30 Seconds Outdoor Cleaner on my white Costco pergola, which had built up a lot of green algae, mildew, and dirt. The difference is incredible — the before and after photos speak for themselves. It removed years-looking grime with surprisingly little effort and brought the pergola back to a clean, bright white. I honestly wasn’t expecting such a dramatic difference. Definitely recommend it for outdoor surfaces with algae and mildew buildup!

Fast clean

Cleans mildew off our fabric Quonset structure quickly and easily