Cleaning an old concrete slab so it will take an acid stain can be very difficult but it is possible.
Cleaning concrete for staining.
For final cleaning you should do a good scrub down using t s p.
Let it settle for 5 10 minutes then scrub with a stiff.
The bad news for the fastidious homeowner is that.
Clean and prep your old concrete as outlined above apply the stain let sit the appropriate amount of time then neutralize.
Resealing your driveway every few years will restore its like new appearance and make it less vulnerable to stains.
Semi dirty outdoor concrete cleaner bleach water 1 8 cup dishwashing detergent.
Mop or rinse a couple of times with clean water.
The sooner you remove leaves oil and grease spills and other contaminants from your concrete.
Rust oil grease paint or glue stains each have a recommended stain removal technique.
The main thing is to not use any kind of acid wash or etching solution including muriatic acid to clean the slab.
The stain will not take at all if you use acid as a cleaner.
Hydrogen peroxide or ammonia also work well too.
General concrete driveway maintenance tips.
Because acid stains need to penetrate into the concrete surface to work it s especially important that the concrete surface is completely clean.
To remove pour one eighth of a cup of liquid dishwashing detergent into a spray bottle then top off the bottle with warm water and shake well.
The process is still the same.
Trisodium phosphate and water.
Our concrete stain prep and our wax remover are both excellent concrete degreasers.
Get those unsightly grease oil and transmission fluid stains off your concrete driveway or garage floor.
Use a stiff straw scrub brush or a floor buffing machine with the aggressive scrubbing pads.
Spray the concrete stains with the soap solution.
Spray them with oven cleaner.
Do choose the right cleaning product for the job see questions to ask when choosing a concrete cleaner or degreaser.
Your supplies are likely to be a bucket scrub brush and detergent.
Reapply sealer as needed.