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Best Efflorescence Remover & Cleaner for White Marks on Paving & Brickwork

The best way to remove white residue on brick or paving surfaces is with a professional efflorescence cleaner. This article will review the best products currently available in the UK and provide you with information about using efflorescence cleaners for maximum effectiveness.

The Best Efflorescence Removal Products To Strip Those White Marks

There are lots of products out there that claim to be the best brick cleaner for efflorescence – but which ones work best? We decided to review two of them. We’ve used these extensively and can testify that they work and do the job with excellent results.

As always, with these kinds of cleaning jobs, it’s best to do a test patch for any product with a small inconspicuous area before applying.

The Top Efflorescence Cleaner For Block Paving – Resiblock ER

Our Top Pick
Resiblock ER (efflorescence Remover) 5lt

Resiblock ER efflorescence remover (5 litres) is best for removing white marks on block paving. It also removes corrosion, oxide and rust; helps stop freezing during winter months which can cause efflorescence problems.

For best results, use a pressure sprayer (e.g., trigger pump) followed by broom treatment on brickwork (you will need two people – one with the pressure sprayer, another with the broom).

This ensures that you get sufficient contact time between product and surface, allowing it to work effectively.

How to Use Resiblock ER

Apply to a wet surface. The unmixed product should be applied 1:1 with clean tap water. Be sure to mix thoroughly before application.

Please note that if applying on a dry surface or when rain is imminent, you will need to use undiluted Resiblock ER at full strength (1 part product & 1 part water).

Do not re-apply after the first application has dried, as this may result in uneven colouration. If this occurs, wash down and then repeat the treatment, applying evenly for even coverage.

Resiblock ER should NOT be used on natural stone surfaces

The Best For Cleaning Efflorescence From Concrete Walls, Bricks & Natural Stone – Stone Care Acid / Salt Remover

For house walls, garden walls, natural stone, patio slabs and loads more then we’d only use this one.

Our 2nd Choice
Stone Care Acid / Salt Remover

Stonecares Essential Efflorenscece & Salts Acid Remover is the best brick efflorescence remover that we’ve used. It does an excellent job removing white marks on brickwork especially.

How to Use Stone Care Salt Remover

You need to spray it at the surface, wait about 1min for it to react with salts build-up, and rinse it off with water.

It saves me a lot of time and hassle. New customers don’t want new walls with unsightly white markings, that’s for sure.

I like how diluted the solution is it’s concentrated but not overbearing – all you need is two cups per gallon of distilled water.

The other great thing about this product is that you don’t have to wear gloves!

Not only does this product remove efflorescence and salt build-up, but it also conditions the surface.

My best advice for those who want to use this product is:

Please don’t be scared of applying too much as you can always dry it off with a piece of cloth later on.

Is Efflorescence A Problem?

Efflorescence is a common problem on a porous material like brick or natural stones. It is caused by the accumulation of salt deposits in the surrounding atmosphere; it looks like patches of white residue.

The best efflorescent cleaner will help you make your paving and brickwork look new again with their innovative formula designed to remove the problem instantly.

Note: If you are planning on sealing any paving and you have efflorescence, then stop.

Using block paving sealer or patio sealer permanently seals the white marks and will spoil what you’re trying to achieve. Removing efflorescence before sealing paving is a crucial step not to be missed.

What Is Efflorescence

Efflorescence is a substance that appears as white crystals on the surface of bricks, paving stones and other masonry.

It’s caused by salts moving to the surface due to environmental conditions breaking down the mortar structure (most commonly) between bricks, paving and patio stones. If you’ve got efflorescence on your brickwork, it will usually be an indication that there are more significant problems beneath the surface.

It’ll have been caused because moisture has been allowed into the structure, necessitating further investigation into underlying causes that need fixing.

How Do I Remove Efflorescence Or Will It Go Away Naturally?

Yes, in time, efflorescence on brickwork or paving will fade and eventually go away.

Not days you can be talking months, sometimes many months.

However, if you want a quick fix for removing white marks from your brickwork so you can sell up, paint the house, seal the patio slabs or whatever other reason, the best professional efflorescence remover is your best solution.

How Do I Clean The White Marks Free

When choosing not to pro products or similar building materials to prevent efflorescence, there are several things you can do.

First, you want to always air dry your brick or paving after it’s been using a pressure washer so that you don’t leave any moisture for the moss to take advantage of.

Once dry, any remaining mildew spots should be scrubbed off the affected area with a 2:1 solution of bleach and water using a brush or stiff brush.

However, if this is not enough, it may be best to consult with an expert before proceeding.

Even acidic treatments can cause permanent damage and affect the surface appearance without adequate testing. Remember you can always create a test area, as some won’t be acid-sensitive surfaces.


Do I Need a Chemical Cleaner?

White patches are best removed with a professionally formulated efflorescence cleaner containing sodium chloride (table salt) combined with anionic surfactants (detergents).

Sodium chloride removes the heavy calcium deposit layer. Anionic surfactants do not build up on the surface of brickwork like synthetic detergents would do – preventing new white spots from developing while cleaning away old ones.

What is Calcium Deposits?

White marks are calcium deposits caused by water, salt or other minerals penetrating porous brick or concrete surfaces. This happens when moisture is absorbed more quickly water evaporates. White marks on the ground may be made of ammonium sulphate, ammonium persulphate, and magnesium nitrate. It does not come from dirt.

Does vinegar remove efflorescence?

Yes, vinegar has been known to remove efflorescence just like other DIY cleaners, but results can be patchy, and the time it takes frustrating.

How do I get rid of heavy efflorescence?

To get rid of heavy and severe efflorescence the steps are the same as above except you’ll need to buy more solution and it will be more work.

Last Word On Efflorescence Removal

Efflorescence is a powdery substance, white in appearence that appears on paving and brickwork. If you want to get rid of it for good without damaging your property or risking the growth of mould or mildew, there are only two real choices – both with excellent results.

The first option is an efflorescence remover called “Resiblock ER“.

This product has been specially formulated to remove efflorescence from concrete block paving surfaces without leaving behind any harmful residues or chemicals that can damage plants in your garden. You can find all the reviews of Resiblock sealing products here.

It’s also safe around children and pets!

The second choice is the Stonecare Efflorescence Remover which is super versatile and can be used across several applications, including natural stone, bricks, walls and concrete.