If you are buying one bottle of outdoor cleaner, these are the two most people end up comparing. They are both all-purpose concentrates for pressure washer or manual use, and they make different trades.
What each listing actually states
| | Simple Green Oxy Solve Total Outdoor | Krud Kutter Multi-Purpose |
|---|
| Format | Concentrate, 128 fl oz | Concentrate |
| Chemistry | Oxygenated, EPA Safer Choice recognized | Multi-purpose outdoor cleaner |
| Stated use | Pressure washer and manual use | Pressure washer and manual use |
| Relative cost per bottle | Higher | Lowest on this site |
Everything in that table comes from the products’ own Amazon catalog listings. Where a figure is not published — neither states a dilution ratio in the listing — it is not stated here either. Check the bottle.
Where Oxy Solve wins
Organic growth. Oxygenated (percarbonate) chemistry is specifically good at the algae and mildew that make a shaded wall or patio look old, which is the problem most people actually have. A general-purpose cleaner handles moderate growth and loses on heavy growth.
Run-off. The EPA Safer Choice recognition on the listing matters in practice, because this stuff ends up on your lawn and in the beds at the base of the wall. Where run-off is unavoidable it is the kinder option.
Unscented variants. The Oxy Solve line includes colorless, unscented formulations for wood, which matters before a stain goes on — deck cleaners.
Where Krud Kutter wins
Cost per mixed gallon. It is the cheapest competent option here by a clear margin, and for a large area that is a real difference rather than a rounding error.
Availability. Widely stocked, so refilling mid-job is possible.
It works by hand too. Both do, and this one is the one you will not mind using on a bucket-and-brush job, which means it does not go to waste if you sell the machine.
The honest verdict
Buy Oxy Solve if your problem is a shaded wall, a green patio or a fence — which is to say, if it is biological. That is where specialist chemistry earns its premium, and it is the more common case.
Buy Krud Kutter if your problem is general grime over a large area, or if this is your first bottle and you want to find out how much cleaner you actually get through before committing.
Neither will touch motor oil. That needs a dedicated pull-out stain remover — concrete cleaners or concrete cleaner vs degreaser.
What matters more than which you pick
Dwell time. Five to ten minutes, kept wet. Either bottle rinsed off after thirty seconds has done almost nothing, and that is the single most common reason people think a cleaner does not work.
The black soap tip. Neither will come out of the machine without it.
Dilution. Both are concentrates, and a downstream injector dilutes your mix again on the way through — mix ratios.
