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Internet # 205722138

Model # EFFLOREM1GAL

1 gal. Concentrated Concrete and Brick Efflorescence Remover and Cleaner

$49.95
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  • Formulated using surfactants, low-odor acids, and detergents
  • Effectively removes efflorescence from bricks and other masonry
  • Helps make the surface ready for sealer or coating application
  • View More Details
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Pay $24.95 after $25 OFF your total qualifying purchase upon opening a new card. 
Apply for a Home Depot Consumer Card

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Product Details

About This Product

The Armor Efflorescence remover is made up of a proprietary blend of low odor acids, surfactants and detergents. It is designed to penetrate and remove efflorescence from concrete, brick and masonry surfaces. It works to remove the efflorescence and prepare the surface for the application of a sealer or coating.

Highlights

  • Will remove efflorescence from concrete, brick and other masonry
  • Deep cleans the surface and deep within the pores
  • Comes in concentrate and can be diluted to desired strength
  • Can be diluted with up to 9 gal. of water to make up to 10 usable gallons
  • Won't discolor the concrete surface
  • Easy to apply
  • Effectively removes existing efflorescence so that the surface can be removed
  • Return Policy
  • California residents
     see Prop 65 WARNINGS

Product Information

Internet # 205722138

Model # EFFLOREM1GAL

Additional Resources

Shop All Foundation Armor

Specifications

Container Size: 1 Gallon

Dimensions

Container Size

1 Gallon

Details

Features

Acidic

Health Facts

No Health Features

Pack Size

1

Paint Prep & Cleanup Product Type

Concrete Cleaner

Product Form

Liquid

Recommended Surfaces

Concrete

Returnable

90-Day

Scent

None

Warranty / Certifications

Manufacturer Warranty

There are no guarantees or warranties to the products performance or suitability to specific applications. Actual conditions of use, handling, and end product performance are the sole responsibility of the user.

Questions & Answers

Clean house brick that has grey stain from new concrete porch that wash on brick
ByNov 12, 2025
1 Answer | 
Answer This Question

If your new concrete splattered the brick before it cured(while wet), the ER100 will not help. You may need a stronger acid to remove such a stain.

By|Nov 13, 2025


    Will this remove old Rust stains on a concrete porch?
    ByApr 19, 2024
    1 Answer | 
    Answer This Question

    The ER100 is not recommended for rust removal. The Armor Rust Remover is a better choice for rust stains.

    By|Apr 25, 2024


      Is this product safe to use around plants, flowers and vegetable gardens?
      ByMar 19, 2024
      1 Answer | 
      Answer This Question

      Hi Joseph, with any chemical being used, we always suggest fully covering any area that the chemical is not intended for. You do not want to get any chemicals on your vegetables, and to be safe, I wouldn't getting chemicals on your plants or flowers.

      By|Mar 21, 2024


        Will this product remove efflorescence deposits on sandstone rocks surrounding swimming pool?
        ByJan 31, 2024
        1 Answer | 
        Answer This Question

        The ER100 is not recommended for sandstone.

        By|Feb 6, 2024


          Will this discolor pavers?
          BySep 29, 2022
          1 Answer | 
          Answer This Question

          The ER100 is a masonry cleaner and should not discolor pavers when properly diluted, used and neutralized(4 gallons of water mixed with one quart of house-hold ammonia). It's an acid detergent mixture.

          By|Mar 9, 2026

            (2)

            Does this product works on Cambridge Ledgestone?
            BySep 26, 2022
            1 Answer | 
            Answer This Question

            If your Cambridge Ledgestone is cast concrete, the ER100 should work. Please refer to Cambridge technical data sheet for additional data regarding surface cleaning. The ER100 is a concentrated acid/detergent cleaner.

            By|Sep 27, 2022


              will this take off old plaster and make the brick look new?
              ByOct 4, 2021
              1 Answer | 
              Answer This Question

              This product will not remove old plaster. It's best for removing mineral deposits from a surface.

              By|Oct 5, 2021


                What happens if you only rinse the solution with water and not ammonia or baking soda?
                BySep 1, 2019
                1 Answer | 
                Answer This Question

                Baking soda and ammonia help neutralize the acid within the cleaner. If the cleaner is diluted enough and rinsed with a high volume of water, it may be enough to remove and dilute the acid to avoid degrading the concrete. Foundation Armor still recommends neutralizing the cleaner with ammonia or water (play it safe).

                By|May 19, 2025

                  (2)

                  Viewing 1-8 of 19

                  Customer Reviews

                  3.3 out of 5

                  • 3.3 out of 24 reviews
                  • 67% recommend this product
                  Filter by:
                  Showing 1-10 of 24 reviews
                  This customer chose to rate the product and not provide text.
                  by
                  • Verified Purchase
                  It doesn’t work very well at all
                  by
                  Response from Foundation ArmorDec 26, 2025
                  Thank-you for taking the time to post a review. The ER100 is an excellent product when properly diluted and applied. Please feel free to give Foundation Armor a call to discuss the application of this product.
                  • Verified Purchase
                  We followed the directions to apply this cleaner and we got no results. Our concrete is just the same as it was before we used this cleaner.
                  by
                  Response from Foundation ArmorSep 4, 2025
                  Hi Jo! This product is designed specifically to remove and clean efflorescence from the concrete. It is an acid-based cleaner and designed specifically for that. If you are looking to clean your concrete, you want a concrete cleaner, like the Armor MSC100. If you have any questions, or would like to give the MSC100 a try, please don't hesitate to reach out!
                  I think the efflorescence was just on the chummy to long.
                  by
                  Response from Foundation ArmorAug 23, 2024
                  Hi! You may need to apply a less concentrated solution. If you could give us a call we can help walk you through how to easily remove it! Have a great day!
                  • Verified Purchase
                  2 found this review helpful
                  Didn't clean brick as well as expected
                  by
                  Response from Foundation ArmorAug 16, 2023
                  Hi! The ER100 is for removing efflorescence. Depending on the severity of the efflorescence, you may need to adjust the dilution ratio. If you have questions about how much to dilute the ER100, or how to use it to remove the efflorescence once the cleaner has been applied, please don't hesitate to reach out to us directly so we can walk you through it. If you are looking for a brick cleaner hower, the Armor MSC100 is a better option. We look forward to hearing from you!
                  • Verified Purchase
                  Took some time and patience. Follow directions. Two applications were...
                  Took some time and patience. Follow directions. Two applications were needed but it worked great.
                  by
                  • Verified Purchase
                  1 found this review helpful
                  The produce foamed as though it reacted to the efflorescence,...
                  The produce foamed as though it reacted to the efflorescence, but after vigorous scrubbing with full-strength product AND a pressure washer rinse, the condition of the brick was unchanged. Will not purchase again.
                  by
                  Response from Foundation ArmorNov 22, 2022
                  Thank you for taking the time to post a review! It is normal for the product to foam, but there are a few things we could suggest changing to help make removing the efflorescence easier for you. If you could reach out to us, we would be more than happy to go over the application in more detail and help you to remove your stubborn efflorescence! Thank you and have a great day!
                  • Verified Purchase
                  4 found this review helpful
                  Did not clean leaf stained concrete driveway - was not...
                  Did not clean leaf stained concrete driveway - was not useful.
                  by
                  • Verified Purchase
                  1 found this review helpful
                  I used this product on new pavestones with efflorescence. I diluted this product 1:1 with water ...
                  I used this product on new pavestones with efflorescence. I diluted this product 1:1 with water and it didn't do such a great job. I used the entire gallon. Next, I ordered another gallon and applied it directly to the pavestones, without diluting it with water, and had the same results. It works ok if you scrub the pavestones with a brush and rinse them with wanter under high pressure. 1 gal doesn't go very far, as I used 2 gal for approximately 200 sq. ft. However, it is way better than using vinegar. I just expected the solution to have better results due to the price. I still have another 100 sq. ft to go
                  by
                  Response from Foundation ArmorJun 4, 2025
                  Hi! Unfortunately, per the instructions, you have to use a stiff bristle brush or wire brush to remove the efflorescence from the surface. The ER100 will attack the efflorescence, but it can't fully remove it without agitating the surface. Unfortunately, where your pavers were new, they likely arrived with efflorescence throughout the entire paver - so it's a tough job and not a lot of fun! In the future, if you have any questions before applying, or during the application, please don't hesitate to reach out! We are always available to assist and more than happy to help!
                  • Verified Purchase
                  2 found this review helpful
                  Foundation Armor efflorescence remover and cleaner
                  The cleaner was easy to use and did an excellent job.
                  by
                    • Recommended
                    Showing 1-10 of 24 reviews

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                    Product Snapshot

                    Ideal for homeowners looking for efflorescence removal, making concrete cleaning easier.
                    Great for homeowners looking for mold and mildew removal, making cleaning easier.
                    Ideal for etching and cleaning concrete, brick, and masonry. Biodegradable, non-corrosive formula ensures a safe work environment.
                    Ideal for eco-conscious users wanting powerful, odorless cleaning and degreasing for concrete, wood, and siding.

                    Cleaning Strength

                    Removes tough efflorescence stains
                    2X stronger than 30 Seconds outdoor cleaner
                    Effective on tough stains and light concrete buildup
                    Removes tough stains, oil, grease, and grime

                    Coverage Area

                    200 sq. ft.
                    750 sq. ft.
                    750 sq. ft.

                    Concentration Level

                    Application Method

                    Environmentally Friendly