Rated 3.9 out of 5 by 97
Rated 5.0 out of 5.0 by John Cleans better than spraying alone
Used up two bottles of this power washing my 2400 sq foot two story house. Ran out on the last few walls so we tried power washing without soaking in ZEP first. Noticeable difference. Ended up running to the Depot for another gallon to soak the last few walls.
July 12, 2016
Rated 2.0 out of 5.0 by Southerngentleman Fair product
For everyday grit and grime on Vinyl siding, this product works very well in a pressure washer. But, for mold and mildew on siding in the deep south, you will still need the tried and true Clorox bleach and water with a tablespoon of dishwashing detergent. I used this product in a much stronger ratio than was noted on the bottle and the mold and mildew resisted my efforts.
October 19, 2016
Rated 5.0 out of 5.0 by Fanta best purchase ever
the chemical was a really bright orange color and pleasing to the eye
I thought it smelled nice too
October 11, 2016
Rated 4.0 out of 5.0 by Ken Seems to help in the cleaning process
We have a few surfaces of our house that have some algae growth and I thought this product would help. It does seem to loosen some of it although I don't know if the power washer itself really does the trick and this wasn't needed. I guess over time I will be able to tell, but for now the rating is based on ease of use with the power washer I bought.
October 13, 2016
Rated 5.0 out of 5.0 by Rich Great on log home
Worked great on my log home. I have used many Zep products and have been very pleased with their performance. It works great in removing dirt, soot and grime with just a soaking and then pressure washing after about ten minutes. Couldn't be happier.
May 31, 2016
Rated 4.0 out of 5.0 by MAC1 Siding Cleaner
Siding cleaner was very good and did an excellent job
October 18, 2016
Rated 1.0 out of 5.0 by SteveG One step above worthless
If this stuff would work at 10% of the advertised hype it might have cleaned something. My pressure 3500 psi@4 gpm washer is set for a 10:1 ratio so I couldn't spray it at any heaver concentration. I tried using a scrub brush and dipping it in the cleaner., . . still without success. Greased Lighting. 409, and Simple Green, each mixed with outdoor type bleach performed considerably better. Save your money. Some products are made to use and some are made to sell. This is definitely made for selling.
September 24, 2016
Rated 3.0 out of 5.0 by Roger Good cleaner to use with the pressure washer
We used Zep Commercial House and Siding Cleaner Concentrate in 20:1 ratio with our pressure washer and got some excellent results. It does not smell like a toxic solution and easy to work with. Over all an effective product that took care of the mold, dirt and fungus from the siding and the garage floor. It did not require any scrubbing but that may be because we were using a pressure washer.
May 1, 2016