Smart 2x1-Gallon Muriatic Acid-2118 HD - The Home Depot
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Model # 2118 HD

Internet # 100119310

Store SKU # 346289

2x1-Gallon Muriatic Acid

Smart 2x1-Gallon Muriatic Acid

This item has been discontinued.
The Home Depot no longer carries this specific product.

$12.98 / each


Model # 2118 HD

Internet # 100119310

Store SKU # 346289

The Smart 2x1-Gallon Muriatic Acid has been packaged for safety. The approved carton may be transported in the car trunk. Just pour in to adjust pH in your swimming pool. It may also be used for etching concrete.

  • Liquid muriatic acid
  • Reduce ph in swimming pool
  • Use to etch concrete
  • Convenient to use
  • Includes two 1-gallon bottles
  • Note: Product may vary by store.

Info & Guides

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Product Depth (in.) 
Product Height (in.) 
Product Width (in.) 
Outdoor Living Product Type 
Pool/Spa/Sauna Accessory 
Product Weight (lb.) 
22 lb 
Warranty / Certifications
Manufacturer Warranty 


Rated 4.9 out of 5 by 9 reviewers.
Rated 5.0 out of 5.0 by Excellent Product I bought this to clean stubborn urine stains in a toilet. I used 3/4 of one bottle. I made sure the toilet had a normal amount of water in it. Carefully but quickly dumped in the HCL. Kept bathroom ventilated and used gloves. Waited about 12 minutes, came back and flushed. I then used minimal effort to remove all staining and the toilet looked brand new. Highly recommended as long as you follow safety precautions. June 17, 2013
Rated 5.0 out of 5.0 by Good but be careful This acid is best for pool maintenance. It is hard to use as the bottle neck will cause acid to splash on you. Be very careful when using. April 28, 2015
Rated 5.0 out of 5.0 by Like in The Old Days I was really surprised to see HD carrying this when I went to get chemicals to get my in ground pool ready for the season. It is the strength I remember from 30+ years ago, and it really works. This acid is 2.5 times more concentrated than what everyone else is selling, and I expect that the one box will last me the season. It does deserve respect, however. This acid will ruin your day if you get it on something important, like your body, so be careful and follow directions when adding it to water. (NEVER add water to concentrated acid!) That said, I've used it not just in the pool, but for cleaning humidifier pads, toilets, calciumed up glasses--it works. April 7, 2015
Rated 4.0 out of 5.0 by Works well - needs better design of the seal under the cap Works well to bring the ph down in the pool. I have a new plaster so it takes quite a bit of acid on a regular basis to keep the ph in the recommended range. What is not good with this product is the way the seal is under the cap. It does not come off nicely like other similar chemical cans and the plastic makes it hard to dispense the product easily. Should be an easy fix... Five stars if the seal is redesigned!! May 10, 2015
Rated 5.0 out of 5.0 by This product worked much better than I had anticipated I used this product to clean a concrete slab that was very dirty and stained. I tried to clean it with a strong pressure washer but the staining was severe. I poured the acid over 2 foot by 2 foot squares at a time and moved it around with a wire brush. the effect was amazing. When I hit the concrete with a hose it was perfectly clean. I wish I had known this before trying to clean with t pressure washer. March 14, 2014
Rated 5.0 out of 5.0 by way better than dry acid/pH- for your pool One gallon of this brought the pH of my 22,000 gallon pool from 8 to 6.5 in 24 hours. More cost-effective and easier on the equipment than the dry acid (pH-) also found at the store. Also a few coins cheaper than the L pool store here. June 4, 2013
Rated 5.0 out of 5.0 by good i used it to etch damascus steel and it works amazing really brings out the design in the steel June 21, 2012
Rated 5.0 out of 5.0 by Great Product Thank you Home Depot on my recent purchase. No other stores in my area carried this product and lucky for me you did. Great service!!! Keep up the good work. December 10, 2013
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Store Exclusive. This item is available for purchase in select stores only.