RadonSeal Efflorescence Cleaner

Cleaning Concrete, Bricks and Stucco

Cleaning concrete or bricks is a tough job! Efflorescence ("white powder") and mineral deposits or stains are not water-soluble and no amount of detergents and "elbow-grease" will help. You could use a high-pressure water sprayer to clean the concrete or bricks, but the water will activate more efflorescence and make it come back stronger than ever.

Some people clean concrete and masonry by acid etching with muriatic acid or just vinegar. It "eats away" minerals, as well as the surface of the concrete or brick. But it may "burn" the surface. The acids leave a harmful residue, which must be neutralized and thoroughly rinsed off. And who likes to work with acids?

RadonSeal Efflorescence Cleaner provides a much more user- and environment-friendly way to clean concrete and masonry. It is easy to apply and leaves no residue.

In case you have to remove paint or mastic first, you can use our user-friendly Concrete Cleaners & Paint Strippers.

The Easy-to-Use Concrete Cleaner

This concrete cleaner is water-based. It does not contain MEK or other chemical solvents, is nonflammable, biodegradable, and environment-friendly. It is easy to apply with a sprayer or brush.

RadonSeal Efflorescence Cleaner contains a high-strength oxidant. Unlike acids, it does not burn concrete or brick surfaces and leaves no residue - there is nothing to wash off. Just let the treated surfaces dry out. Use gloves and goggles during application.

Killing Molds & Mildew

The Efflorescence Cleaner is also is most effective in killing molds and mildew on concrete, masonry, and bricks - on the surface or hidden inside the pores. Spray the cleaner on the walls and floors in musty or damp basements. Or use it to prevent the growth of molds in recently flooded basement. Afterwards, seal the concrete with RadonSeal concrete sealer against capillary seepage and water vapor - reducing humidity is the key to fighting molds and mildew, as well as musty odors.

Typical Cleaning Applications

Use it to clean poured concrete, concrete blocks, bricks, stucco, and stones. This concrete cleaner reacts with, emulsifies, and removes minerals and stains:

• efflorescence
• lime deposits
• atmospheric carbon
• metal salt stains
• molds and mildew

Typical brick or concrete cleaning projects:

• cleaning efflorescence of basement walls and floors or slabs
• killing molds and mildew in damp or musty basements
• restoration or renovation of older buildings or structures
• cleaning laitance of new concrete (must be at least 10 days old and thoroughly dry)
• cleaning brick fireplaces
• stone monuments.

Preparation

Remove any oil deposits with a dishwashing liquid, detergents, degreasers or other cleaners. You can remove heavy dirt, oil stains, paint or mastic with our Concrete Cleaners & Paint Strippers.

A thick rocky build-up (calcium carbonate) created by long-term efflorescence may have to be chipped away with a chisel.

The concrete or brick surfaces must be completely dry (below 20% moisture content).

Cover all other objects like fixtures, windows, metallic frames, and plants to protect them against over-spray.

Concrete Cleaner Application

It is critical to thoroughly mix the Efflorescence Cleaner with the included mixing tool. Mix for about 5 minutes, letting it settle when it foams up. Mix or shake also between applications. (If it has not been well mixed, it will leave an oily deposit on the surface which has to be washed off with a dishwashing liquid like Dawn in warm water.)

Apply the cleaner with a low-pressure (garden) sprayer or a brush. Preferably, use a sprayers made entirely of polyethylene ("Roundup") or stainless steel to avoid degradation of components.

Allow the concrete cleaner to react and emulsify the deposits. While still wet, re-spray heavily effloresced areas. If needed, vigorously scrub heavy deposits with a stainless steel wire brush.

Just let the surface dry and sweep it clean. Avoid applying water, which would re-activate efflorescence inside the concrete or bricks.

RadonSeal Efflorescence Cleaner pail label in PDF.

Sealing:
To prevent the efflorescence from coming back, you must deep-seal the concrete, mortar, or masonry against water migration and efflorescence. First, let the cleaner work under the surface for a day. Seal concrete or block walls with RadonSeal Penetrating Concrete Sealer and brick walls with LastiSeal Concrete & Brick Sealer.

Disclaimer

Read the label and precautions on the product! The purchaser shall determine the suitability of this product for the intended use or varied methods of application. We do not provide any warranties regarding the suitability or performance of the product and shall not be liable for any injury, loss, direct, indirect, or consequential damages arising out of the use of this product.

Test the product in a sample area first. This product is non-returnable.

Coverage and Price

The coverage depends on the amount of efflorescence, which is usually only spotty. But assuming a continuous layer, the typical coverage is 150–200 sq. ft. per gallon. Heavy deposits may need re-spraying.

This concrete cleaner is shipped in special vented pails, available only in a 5-gallon size. The amount shipped is either 5 gallons or 2.5 gallons (partially filled).  

Orders received by 2 PM are normally shipped on the same workday. Shipping by UPS Ground to the lower 48 states. (Cannot be shipped by air.) Delivery normally in 3–5 working days.

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Any questions? Please contact us by e-mail,
telephone (203) 225-0366 or toll-free 1-800-472-0603

MADE IN USA
Products not sold through retail stores. Available exclusively from:
Radon Mitigation & Waterproofing Concrete Sealer Co.
Novion Inc., 18 L'Hermitage Drive, Shelton, CT 06484 USA
RadonSeal™ is a registered trademark. Copyright © 1998-2008. All rights reserved.