Most stained pavers do not need replacing. They need the right product, and which one depends entirely on what made the mark. Oil, rust and organic staining look similar at a glance and respond to completely different treatments, so identifying the stain is most of the job.
Three marks that look alike and need different answers
Oil sits in the pores rather than on the surface, so scrubbing moves it around and pressure drives it deeper. It comes out with a poultice that draws it back up over several hours, and it usually takes more than one application on an old mark.
Rust is a chemical stain from railings, furniture feet or iron in fertiliser, and it needs an acid-based product formulated for it; bleach and pressure will lighten the surrounding stone and leave the rust exactly where it was.
Organic marks from leaves, berries and moss are the easiest and respond to an outdoor cleaner with dwell time. Getting this wrong is expensive in a way that is hard to reverse, because an acid used on the wrong stain etches the paver face permanently.
Oil, rust and organic marks look similar and need different chemistry. Using the wrong one can etch the face permanently.
Test in a hidden spot
Whatever we intend to use goes on somewhere out of sight first, so any reaction happens where nobody has to look at it.
Treat with dwell time
Most products work by sitting rather than by scrubbing, so the treatment is left to do its job before anything is rinsed.
Swap only what is left
Anything the treatment cannot lift gets replaced, and by then it is a handful of units rather than a surface.
Moving Stone
The hidden area trick for a bad stain
Where a stain will not lift and the paver line is no longer made, the answer is often to move stone rather than buy it. A unit taken from behind a shed, under a planter or along a hidden edge goes into the visible spot, and the new mismatched paver goes where nobody looks.
No. Oil sits in the pores and pressure drives it deeper while stripping your joint sand. It needs a poultice that draws the oil back up over several hours.
Rust, usually from the post itself or from iron in a fertiliser that got spread across the surface. It needs an acid-based product made for rust rather than bleach.
Organic marks nearly always. Oil and rust often fade rather than vanish, especially on an old stain, and we will tell you which you are likely to get.
Cleaning, by a wide margin, which is why it is always the first attempt. Replacement is what happens to the two or three units that will not come clean.
It slows absorption considerably, which buys you time to get to a spill. It does not make a surface stain proof, and it needs redoing every three to five years.
It behaves the same and responds to the same poultice. The difference is that it is usually fresher and shallower, so it lifts more completely. A mat under the barbecue from now on costs less than the next treatment.
