I use Project Pro PerfectMix Extreme Concentrate - Mold and Mildew Cleaner to clean vinyl siding. I simply put the bottle in the holder on my Craftsman 2600 PSI Pressure washer and install the siphon tube into the bottle. The Project Pro PerfectMix Extreme Concentrate is automatically applied during the soap application. After applying the Concentrate Cleaner, let it remain on the surface for 1 to 3 minutes. It is noted in the Directions for use: Do Not Allow The Solution To Dry! Please read the directions on the bottle before using the Project Pro PerfectMix Extreme Concentrate - Mold and Mildew Cleaner. The bottle is labeled for use on Decks/Fences, Siding and Walkways. This product works great with pressure washers. Cleaning couldn't be easier..it shows when the job is completed.
Used this stuff on half of my deck and used nothing on the other half. I honestly can not tell any difference. In my opinion it is not worth two squirts.
I have Tuesday thus product in the past and it does a great job cleaning my house. Once the weather breaks I will use it again.
bottle is reusable