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ComStar Pure Lye | 99% Pure Sodium Hydroxide Beads | Eco-Friendly, Industrial Strength, Biodegradable Drain Opener | Safe on Fixtures | Static-Free, Unique Beads for Soap Making | 1 lb. (30-500)

4.5 4.5 out of 5 stars 6,517 ratings
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Purchase options and add-ons

Brand Comstar
Scent odorless
Item Weight 1 Pounds
State of matter Solid
Liquid Volume 1 Liters

About this item

  • ComStar Pure Lye is an industrial-strength, eco-friendly, 99% pure Sodium Hydroxide bead formula. It's designed to clear out drains, grease traps, and septic systems by dissolving grease, hair and root growth instantly. ComStar Pure Lye is also a best-selling soap maker!
  • This sodium hydroxide formula is the purest white, bead-size lye in the world—99% pure. A natural drain opener, its non-acid, biodegradable formula is safe on fine fixtures, chrome trim, and metal or plastic pipes, if used as directed.
  • This fantastic product clears clogged and slow-moving drains, grease traps, and septic systems without harming septic or cesspools. Applied regularly, it enhances the growth of active bacteria. Because of its unique bead shape, ComStar Pure Lye will sink to the bottom of standing water and attack the cause of the blockage for a fast break-up.
  • ComStar Pure Lye does not stink or create fumes and has become a favorite drain-opening product for homes, schools, hospitals, cafeterias, and restaurants.
  • Crafters prefer ComStar Pure Lye’s small beads for soap making because they do not clump together, create static, and dissolve quickly. As a result, soap making is faster and easier with ComStar Pure Lye.

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ComStar

ComStar Pure Lye | 99% Pure Sodium Hydroxide Beads | Eco-Friendly, Industrial Strength, Biodegradable Drain Opener | Safe on Fixtures | Static-Free, Unique Beads for Soap Making | 1 lb. (30-500)

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Product Description

ComStar Pure Lye is an industrial-strength environmentally safe, bead formula designed to clear out drains, grease traps, septic systems, and roots. ComStar Pure Lye is also a best-selling soap maker. This sodium hydroxide formula is the purest white, bead-size lye in the world—99% pure. A natural drain opener, ComStar Pure Lye is biodegradable and odorless with a non-acid formula that is safe on fine fixtures, chrome trim, and metal or plastic pipes. This amazing product clears out clogged and slow-moving drains, grease traps, and septic systems, without harming septic tanks or cesspools. Because of the unique bead shape, ComStar Pure Lye will sink to the bottom of standing water and attack the cause of the blockage for a fast break-up. ComStar Pure Lye does not stink or create fumes and has become a favorite drain-opening product for homes, schools, hospitals, cafeterias, and restaurants. ComStar Pure Lye’s small bead form is preferred for soap making. Unlike more common flake formulas, ComStar Pure Lye Beads do not clump together, create static, and dissolve quickly. Because of this, soap making is faster and easier with ComStar Pure Lye.

Important information

Ingredients

SODIUM HYDROXIDE

Legal Disclaimer

You are trying to purchase a hazardous material. First you must agree to the following depending on the product purchased: • You fully understand that this material is considered Hazardous and could cause bodily harm. • You assume all responsibility for its safe use and proper storage. • You are at least 18 years of age. • You understand that it should not be used near an open flame or spark. • You will only use it in a well ventilated area. • If you are unsure about any of these points please call us at 1-800-328-0142 or email us at info@comstarproducts.com and we will answer any questions you have. Thank you for taking the time to consider and understand the risks involved with this hazardous material.

From the manufacturer

Why Choose Pure Lye!?

Final Pure Lye

Final Pure Lye 2

Final pure Lye 3

Unique Bead Size Lye Sinks to the Bottom of a Drain

Used in Drains, Septic Tanks, and Grease Traps

Safe for Fine Fixtures and Chrome Trims

Top Features

Final Pure Lye 4

Final Pure Lye 5

Final Pure Lye 6

Industrial Strength Sodium Hydroxide Solution

Industrial-Strength 99% Pure Sodium Hydroxide Bead Formula.

Bio-Safe Series

ComStar Pure Lye is part of our Bio-Safe series as the ingredients are bio-safe when disposed of properly.

Unique Bead-Sized Lye

ComStar Pure Lye uses a on-of-a-kind Bead Sized formula.

Used by Crafters to Make Hand Made Lye Soaps

Final Pure Lye 7

Final Pure lye 8

Final Pure Lye 9

Beads Don't Create Static or Clump

Easy to Mix and Pour into any Mold

Let Sit for Four Weeks and Enjoy

What's in the box

  • drain opener

    • Looking for specific info?

    Customer reviews

    4.5 out of 5 stars
    4.5 out of 5
    6,517 global ratings

    Customers say

    Customers like the quality and ease of use of the product. For example, they mention it works well and is simple to use. Some appreciate the soap, durability, and opening. That said, some complain about the value and safety.

    AI-generated from the text of customer reviews

    1,635 customers mention1,346 positive289 negative

    Customers like the quality of the product. They mention that it works well in opening up the shower drain, and is effective on stubborn clogged drains. They are also impressed with how quickly it works, and how fast the water goes smoothly down the drain.

    "...To my surprise it was here and it works great! I used it on a slow draining bathroom sink and it worked in 5 minutes...." Read more

    "...careful to avoid the contact with your skin and such but, man, do these work well. I was using draino like every month just to keep my sink draining...." Read more

    "...faucet at the same time as the washer drain cycle and there was no back-up of water. UNBELIEVABLE!!..." Read more

    "...Now I'm running back and forth like a crazy woman but guess what! Nooooo clog, no water pooling, nothing. I'm so amazed with this product...." Read more

    148 customers mention131 positive17 negative

    Customers find the product easy to use. They mention that it works well, is easy to handle, and takes very little to work. Some say the container is easy and the product sets up well.

    "Used this to make homemade soap and it worked great and was easy to work with." Read more

    "...However, as long as you follow the directions, it is safe and simple to use, but most importantly, it is EFFECTIVE!..." Read more

    "...I watched a YouTube video to see how to apply the lye. It was simple enough. I placed the lye in the drain and followed the steps...." Read more

    "...It's saved me a lot of time and money.Using it is easy, carefully pour the granules into the drain and add just enough hot water to soak..." Read more

    65 customers mention65 positive0 negative

    Customers say the soap is good for making soap. They say it's a good source of lye and is perfect for making cold process soaps. Customers also mention that the soap comes out great and is nice to work with.

    "...I didn’t expect much since I had no experience but the soap turned out really good! It got stains out of my carpet that I didn’t know could come out!..." Read more

    "...Buy from the source - also makes great home-made soap..." Read more

    "GREAT for any drain in the house. Much better than a liquid product. Just follow the directions and it gets the job done...." Read more

    "...concerned that because it said 99% lye it would not work but it made great soap, it will make the lye solution little yellow instead of clear when..." Read more

    63 customers mention63 positive0 negative

    Customers are satisfied with the durability of the product. They mention it's super strong, powerful, and reliable. They also say the consistency and potency is reliable. Customers also say it can solidify but it never fails. They recommend it for stubborn clogs.

    "...Highly recommend for stubborn clogs." Read more

    "...It's a very strong desiccant so it basically absorbs moisture from anything - air, crap in your pipes, and skin -- so wear gloves otherwise if you..." Read more

    "...Must wear gloves and safety goggles, stuff is powerful" Read more

    "...This lye works so well and can last for at least 4x longer than the liquid drain cleaner. It's saved me a lot of time and money...." Read more

    54 customers mention42 positive12 negative

    Customers like the opening of the drain opener. For example, they say it's more effective than other liquids, great for opening clogged drains, and does a nice job opening up a sink drain. Some mention that it'll open the tub drain on the first try. Overall, most are happy with the product's ability to unclog drains.

    "I used it to unclog a kitchen drain. The drain opened immediately." Read more

    "...Can hardly believe it! The drain is open!!..." Read more

    "...Waited about 20 minutes and flushed with hot tap water. Magic! Drain is now open. Recommended, I will buy again." Read more

    "...As most of this settles to the bottom, the drain is now 100%, fully obstructed...." Read more

    83 customers mention29 positive54 negative

    Customers are mixed about the safety of the product. Some mention it's safe and simple to use, while others say it'll cause chemical burns.

    "...First, this stuff, pure NaOH, is dangerous, as it can burn holes and even dissolve flesh—it’s the stuff that Walter White should have used in..." Read more

    "...However, as long as you follow the directions, it is safe and simple to use, but most importantly, it is EFFECTIVE!..." Read more

    "...and maintain a healthy fear of lye, because the stuff is really dangerous to play around with if you're not taking all the precautions." Read more

    "...this stuff is not for the average DIY guy, this has a STRONG reaction when you first pour some into the drain...." Read more

    79 customers mention36 positive43 negative

    Customers have mixed opinions about the smell of the product. Some mention that it has no odor and no hazards, while others say that the fumes can be pungent and potentially dangerous. They also say that there is a toxic residue on the outside of the bottle that creates fume and steam.

    "...And what's worse is that it was spewing a sort of chemical "smoke" in the air! So that didn't work; I was left with about a half a bottle...." Read more

    "...Now the sink drains the way it should.There was no smell or vapors involved, at least that I can tell...." Read more

    "...little fumes will be coming up and it smells bad, but it works great. I did it two times with every sink and one bathtub...." Read more

    "...No bad smell appears，I have purchased three bottles in a row" Read more

    112 customers mention29 positive83 negative

    Customers are dissatisfied with the value of the product. They mention that it is a complete waste of money, not a perfect product, and not worth the hassle. Some say that the product is overpriced and not very effective.

    "...Many of the gels work fairly well, but are very expensive and require you to have a poisonous liquid under your counter...." Read more

    "...The others are a complete waste of money." Read more

    "Dry effective for the money" Read more

    "...Unfortunately, however, I have not experienced great results...." Read more

    powder of sink clearing +5
    5 Stars
    powder of sink clearing +5
    Draino, Liquid Plumber, Snakes, and whatever other random baking soda wanna-be-awesome recipes that exist on the internet have all failed. BUT THIS WORKED. I was at my wits end for how to clear this clog. My kitchen sink has been clogged since I moved into this place, and even the building maintenance just kept coming and re-snaking it. All that did was upgrade it from no-drain to slow-drain. Armed with thick kitchen gloves and swim goggles (don't judge) I poured in one cup of this product followed by a pitcher or steaming hot pre-boiling water. I quickly covered the drain hole and jumped back! But alas, nothing happened. Slowly, I peeled my googles off and waited for a noise, or a reaction or a ... something. After several long minutes, I accepted defeat and trudged back to my couch. A mere 15 minutes later I heard this loud ... sucking ... sound. I dashed (or at least crookedly half jogged) to the kitchen to find that the water in my sink was being quite forcefully sucked under my (albeit flimsy and totally old) sink drain cover. Carefully with a wooden spoon I nudged away the drain cover and watched all the leftover water flush away. I turned the hot tap on for about 15 minutes and watched as steaming hot water gushed into my sink and down my pipes as if the sucker was brand new. I REJOICED with the voice of a THOUSAND ANGELS. Well, not really, but that sounded a lot better than 'I had a beer'. Sooooo, yeah, I love this stuff forever. It totally is the best.
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    Top reviews from the United States

    A. Quammie
    5.0 out of 5 stars Awesome!
    Reviewed in the United States on April 4, 2024
    Size: 1-(Pack)Verified Purchase
    I had a shower drain in our 6 year old home that has been draining slow since we moved in. I tried all of the consumer products but the problem would come back in 30 days. I finally paid a plumber $200 to fix the problem and they used this product. I took note of the name and searched Amazon. To my surprise it was here and it works great! I used it on a slow draining bathroom sink and it worked in 5 minutes. I wish I knew about these products sooner as I've wasted so much time and money on consumer grade products over the years.
    Helpful
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    Amazon Customer
    5.0 out of 5 stars This stuff really works
    Reviewed in the United States on March 9, 2024
    Size: 1-(Pack)Verified Purchase
    You have to follow the instructions and be careful to avoid the contact with your skin and such but, man, do these work well. I was using draino like every month just to keep my sink draining. Used these ONE time months ago and have not had a problem again. Highly recommend for stubborn clogs.
    One person found this helpful
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    Vinny
    5.0 out of 5 stars Spent Hundreds On Other Products. Nothing Cleared The 40-Year Grease Build Up Like This!
    Reviewed in the United States on July 23, 2023
    Size: 1-(Pack)Verified Purchase
    Let me first state that you need to follow all safety precautions when using this product. Gloves, Eye protection etc. I had an issue that has been ongoing for years - the washing machine would drain and water would back-fill into the kitchen sink then slowly drain out ok. Over the years I had plumbers come and snake the line from the kitchen and this would either solve the problem for a while or just not even work very well.

    Snaking does not get rid of anything, it just moves the gunk around. My house is 50 years old and I assume the pipes were filled with grease and lint combo that had gotten to a point where the pipes should have been replaced. I tried everything over the last few months. All the liquid plumbers, worthless enzymes etc etc. Literally wasted a few hundred dollars on all that. Nothing worked.

    The problem got so bad that water was now backing up into the washer drain pipe as well. I had to stand next to the washer during the drain cycle and stop the draining then start it again.

    I was almost ready to give up. I kept searching on Amazon and this Lye stuff showed up in the search result. I never heard of it before. I bought two of these and will now explain what my procedure was:

    Put on gloves and eye protection. Put about half of one container into a bucket. Added about 6 cups of cold water. Used old wooden chop sticks to slowly mix it. It will get really warm. Poured it slowly into the KITCHEN sink. Did the same thing again with the rest of container one and poured it into the WASHER drain pipe.

    I did not allow any water after that to get into the pipes for the whole night. I pre-poured water into buckets for washing hands and even late night pee runs were done in a bucket pre filled with water.

    I did this process for two nights in a row using both containers of this lye I bought. The next day I filled the kitchen sink with VERY hot water and dish soap. Let it drain. This was done each day so a total of twice.

    The problem stated has been completely solved. I can run the washing on full load and run the kitchen faucet at the same time as the washer drain cycle and there was no back-up of water. UNBELIEVABLE!!

    This was my last chance, if this didn't work then I would probably spend thousands to just have those outgoing pipes replaced. Thanks to the people who make this product.
    30 people found this helpful
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    J. Miller
    4.0 out of 5 stars A Covid Tale
    Reviewed in the United States on June 7, 2020
    Size: 1-(Pack)Verified Purchase
    There are so many interesting reviews of this product. It's not the first thing that you'd reach for to clear a clogged drain, so many of the reviews here tell of battles against serious blockages, where many attempts have failed until the lye finally won the day, concluding with weird sounds coming from the drain, and that moment of release as the water funnels down. Then there are the few scary stories where the lye solidified like cement, leading to professional plumbers knocking holes in the drywall. Our story is a bit different.

    Our kitchen drain clog hit about the same time it was realized that the Coid-19 was spreading in the Seattle area in early March 2020. After two or three years of the dishwasher occasionally backing up into the kitchen sink, one night the kitchen sink itself took hours to drain. What with the stay at home order, and us being at higher risk because of age, this is clearly going to be a do-it-yourself project, so I order a drain auger from Amazon. Little do we realize that this is going be a 10-week struggle. Ten weeks of disappointment and failure punctuated by occasional pandemic-slowed shipments of plumbing supplies.

    Well, a 3/8-inch auger won’t get around bends in the pipe. A ¼ inch one will, and after I learn how to use it without getting it all twisted inside the pipe, I realized that there is an immovable clog about 5 feet down. It cann’t be budged. On a zoom call, the brothers-in-law say, “use Draino.” So I pull out the dishwasher and disconnected it—I don’t want anything caustic backing up into that—and dump half of a large bottle down the drain. Up comes soapsuds, and a lot of sand. Not really sand, but fine light brown grit, fibrous food matter, ground up by the garbage disposal and deposited on the inside of the pipes over 35 years. As most of this settles to the bottom, the drain is now 100%, fully obstructed. A couple more half bottles of drain cleaner gel do nothing.

    Enter the lye, discovered through Google and described by hundreds of Amazon reviewers as a magic clog-buster. I couldn’t resist. Reading all of these reviews two things became clear. First, this stuff, pure NaOH, is dangerous, as it can burn holes and even dissolve flesh—it’s the stuff that Walter White should have used in Breaking Bad instead of sulfuric acid. It also dissolves aluminum, making explosive hydrogen gas in the process. Fortunately, like most houses, our pipes are lye-safe PVC. Secondly, one of the two ways to use this stuff, to dump the crystals directly into the drain, is just crazy—if the drain is damp but empty, the NaOH can hydrate and turn into a hard clumps that could further obstruct the pipes.

    So, I put on a long sleeve shirt, old pants, rubber gloves, a surgical mask, and a stocking cap, so that with my glasses, I am covered. I mix a half bottle of lye with about a liter of water in a glass jar, stir with a plastic spoon and chopstick until it’s thoroughly dissolved. It’s about 3 to 4 molar NaOH, and it gets hot. I use a steel funnel to carefully pour it through a bypass directly down into the pipe. Twelve hours later, near boiling water goes down the drain. No effect! None! By now we are looking through lists of plumbers, hoping to avoid someone who won’t wear masks and coughs a lot. By now, it’s Memorial Day weekend, so we don’t call yet.

    Then there is a small glimmer of hope. After 3 days the water starts to slowly drain, about a quart per 24 hours. No plumber, I’m going to work with this stuff. Another treatment, no difference. So, we send for another pound of lye from east coast Amazon warehouses. While waiting, more snaking. After hours of labor, suddenly the auger advances a couple of inches, but then the clog doesn’t yield further. Still, it is a small encouraging step. Then the third lye treatment again achieved nothing.

    I have no ideas other than more of the same. Then on another zoom call my son-in-law says to use a plunger and block the air vent. The plunger hadn’t worked before. But he’s a chemist, and he’s telling me to use physics. Newton! Gravity! Fluid dynamics…err, actually fluid statics, the study of fluids at rest. I fill up our large kitchen sink with water. That’s got to be 30 or 40 pounds of force, pressing down on the clog, pushing it down towards the main sewer line. Duct tape over the air vent. I plunge several times a day. After a couple of days, the water level in the sink only goes down about a half inch. Then I try the garbage disposal, which should pack a bigger punch that the plunger. As I start a second disposal blast, the water level starts to visibly drop. Then it’s rapidly spinning down the drain! “Freude, schöner Götterfunken!” In the words of Friedrich Schiller with music by Ludwig von Beethoven, “Watch that f***er flow!”

    So, my concluding thoughts are that lye is should work wonders if your sink is seriously plugged by grease or hair. Our case was different. It didn’t directly fix the problem, but it contributed to the solution. But it is too dangerous and laborious for everyday use. I’ll keep a bottle of that drain cleaner gel around for occasional maintenance to ward off a future drain Armageddon.
    38 people found this helpful
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    Mary Johnson
    5.0 out of 5 stars Unclogs drain fast
    Reviewed in the United States on March 11, 2024
    Size: 1-(Pack)Verified Purchase
    I used it to unclog a kitchen drain. The drain opened immediately.
    One person found this helpful
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    Top reviews from other countries

    Translate all reviews to English
    John
    5.0 out of 5 stars Saved my expensive drill bits.
    Reviewed in Canada on September 28, 2022
    Size: 1-(Pack)Verified Purchase
    Have no idea if it unclogs toilets or sinks, but it repairs drill bits damaged by aluminum buildup amazingly well. By leaving the bits in a solution of water and Lye overnight, even Drill Flutes totally clogged with aluminum were completely free. Saving me major $ and headaches. Had no idea it would work so well!
    One person found this helpful
     Report
    Adrian Gutierrez
    5.0 out of 5 stars Algo tardado pero buen producto
    Reviewed in Mexico on October 7, 2019
    Size: 1-(Pack)Verified Purchase
    Buen producto
    Report
    Japas
    5.0 out of 5 stars Handle with care. Wear safety goggles and proper gloves
    Reviewed in Canada on April 24, 2021
    Size: 1-(Pack)Verified Purchase
    As described
    Report
    mark williams
    5.0 out of 5 stars Worth buying
    Reviewed in Canada on January 3, 2018
    Size: 1-(Pack)Verified Purchase
    Arrived sooner than expected. Works better than drano, apparently.
    Report
    Shane spencer
    3.0 out of 5 stars Three Stars
    Reviewed in Canada on November 15, 2017
    Size: 1-(Pack)Verified Purchase
    This didn't fix my clog
    Report