---
product_id: 12126117
title: "Pure Lye 1 lb Drain Opener, 99% Sodium Hydroxide Beads, Soap Maker"
brand: "comstar"
price: "€ 50.85"
currency: EUR
in_stock: true
reviews_count: 9
category: "Com Star"
url: https://www.desertcart.fr/products/12126117-pure-lye-1-lb-drain-opener-99-sodium-hydroxide-beads
store_origin: FR
region: France
---

# fast-dissolving bead shape for soap making eco-friendly & biodegradable formula 99% pure sodium hydroxide beads Pure Lye 1 lb Drain Opener, 99% Sodium Hydroxide Beads, Soap Maker

**Brand:** comstar
**Price:** € 50.85
**Availability:** ✅ In Stock

## Summary

> 🚿 Clear drains, craft soap, and save the planet—one bead at a time!

## Quick Answers

- **What is this?** Pure Lye 1 lb Drain Opener, 99% Sodium Hydroxide Beads, Soap Maker by comstar
- **How much does it cost?** € 50.85 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fr](https://www.desertcart.fr/products/12126117-pure-lye-1-lb-drain-opener-99-sodium-hydroxide-beads)

## Best For

- comstar enthusiasts

## Why This Product

- Trusted comstar brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Bead Technology:** Unique bead form sinks and dissolves quickly—no clumps, no static
- • **Eco-Safe Formula:** Biodegradable and septic-safe for guilt-free drain care
- • **Fixture Friendly:** Odorless, non-acidic, and safe on all pipes and fine fixtures
- • **Soap Maker’s Secret:** Preferred by pros for faster, consistent soap crafting
- • **Industrial-Grade Purity:** 99% pure sodium hydroxide beads for maximum clog-busting power

## Overview

ComStar Pure Lye is a 1 lb pack of 99% pure sodium hydroxide beads designed for professional-strength drain clearing and soap making. Its unique bead shape dissolves quickly without clumping, safely breaking down grease, hair, and roots while being odorless and safe on all pipe types. Eco-friendly and biodegradable, it’s trusted in homes, schools, and hospitals for effective, septic-safe cleaning.

## 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.

Review: I'm totally surprised ... and impressed! It WORKED! - I read through other desertcart reviews about this product, so decided to give it a try. I have to say, I'm totally impressed! I had a bathroom drain that was nearly completely clogged up, mostly with hair. Ordinarily, I'd have just pulled out the drain plug, dug the hair out with my hemostats, and been done with it. But this particular plug is unnecessarily difficult to get out, so I thought I'd try something else. My first attempt was with some sort of drain cleaner. Directions said to use half of the bottle, I think there was maybe 1/3 of the bottle left, so I used that. Poured it into the bathtub drain, left it overnight, took a shower the next day and saw no improvement whatsoever. It took 1 inch of water in the bathtub about 40 minutes to drain. Expecting the Lye to perform no better than my drain cleaner, poured it down the drain 4 times, rather than "just" following the directions. I reasoned that perhaps most of the solution would drain PAST the hair clog, and NOT dissolve the clog? So, on the first night, I estimated doing what the directions said, 1 cup of Lye dissolved into 1 to 1 1/2 cups of water. Poured it down the drain. Left it overnight. Next day, made up a small solution - maybe half of what the directions suggested, poured it slowly into the drain. Did that, again, that evening, and, again, the next day. Four days later, I took a shower in that particular shower, and it drained just fine, I couldn't believe it! So, now I'm wondering how much the lye actually worked after only ONE administration, rather than 4. But I'm glad and quite impressed that it really did work. In total, I used about 2/3 of the bottle, with plenty left over for other drains in the house. Of note: Lye is not the nicest stuff to use or have around in your house. I found out that when you mix it with water, it generates heat. I could easily feel the heat through the plastic bucket that I used to mix the solution. Lye will chemically burn your skin, to be careful. Don't let it touch your skin, and be especially careful not to get it into your eyes. Also, according to wikipedia, Lye can pull enough water out of the atmosphere to turn itself into a liquid solution (which generates heat) and can potentially ignite other flammable substances (paint? gasoline? paint thinner?) So I'll use ALL of the remaining Lye in my other household drains, and NOT store it in the house or in the hot garage. Knowing full well that the next time the drain even STARTS to drain SLOWLY, the solution is only one quick visit to desertcart and a couple of days away.
Review: Miracle worker - My kitchen sink backs into my bathroom sink once a year. The plumber says its roots. I dont beleive him. This year, I wasnt spending $700 for them to come out and clear the lines. Since december I have tried zap stuff, twice and it didnt work. I borrowed a snake, snaked thru the entire line, didnt work. I almost gave up and called a plumber but decided to come on desertcart and look at reviews on drain cleaners. This product does NOT disappoint!!! It arrived about 2 hours ago. I heavily armed myself with protective gloves, eyewear and old heavy clothes. (My dad scared the life out of me about this stuff being very dangerous) I read the directions about 40 times before I was confident enough to use it. I really didnt want to burn an arm off or worse, cause my pipes to melt causing me more money that I dont have. Ok. I followed the direction for a slow drain. First I boiled water and sent that down the drain a few times as it says to "warm the pipes up" then I used one cup of this miracle stuff in each drain. It fizzed, hissed and reminded me of the science experiment in middle school of an exploding volcano that only half works... it erupted, slightly. Then all settled and I waited, and waited. I didnt want to jump the gun at just 15 minutes. This was some major clog we were working with. So while I waited, I started boiling water in ever big pot I had on all my burners. Alexa rang and my time was up! I started off pouring the boiling water SLOWLY down the first drain I dropped the product down. Nothing. No fizzing, no exploding. It just kept draining. Shocked. I ran to my kitchen and started dumping water down the drain... surely it would back up into my bathroom sink again... three gallons down the hatch... i run to the bathroom... it's clear! Holy moly! I put this stuff to the test. I run both the sinks hot water full blast down the kitchen sink and bathroom. 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. For weeks I have been stressing about not having the money to fix this, but after spending under 6 bucks on this stuff I am floored. I will NEVER buy any other drain cleaner again and neither should you! This stuff is a game changer!

## Features

- 99% PURE SODIUM HYDROXIDE: Our industrial-strength formula is the purest white, bead-size lye available. This professional-grade sodium hydroxide is designed to dissolve grease, hair, and root growth instantly, making it the ultimate drain opener for stubborn clogs.
- THE SOAP MAKER’S FAVORITE: Crafters prefer ComStar Pure Lye for its unique bead shape that dissolves quickly and won't clump or create static. Whether you are a beginner or a pro, these small beads make soap making faster, easier, and more consistent.
- ECO-FRIENDLY & BIODEGRADABLE: Clean your drains without the guilt. Our non-acid, biodegradable formula is safe for septic systems, cesspools, and grease traps. It even enhances the growth of active bacteria in your septic system when used regularly.
- SAFE ON FIXTURES & PIPES: Unlike harsh acid cleaners, Pure Lye is safe on fine fixtures, chrome trim, and all types of metal or plastic (PVC) pipes. It is odorless and creates no offensive fumes, making it ideal for use in homes, schools, and hospitals.
- UNIQUE BEAD TECHNOLOGY: Because of their specific density and shape, these beads sink through standing water to attack the cause of the blockage directly at the bottom of the pipe for a fast, effective break-up of grease and organic matter.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00PKNBK24 |
| Best Sellers Rank | #3,733 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #10 in Commercial Drain Openers #53 in Chemical Drain Openers |
| Brand | ComStar |
| Brand Name | ComStar |
| Customer Reviews | 4.5 out of 5 stars 7,001 Reviews |
| Global Trade Identification Number | 00024924305003 |
| Included Components | drain opener |
| Item Form | Pellets |
| Item Highlight | Unique Beads for Drains, Septic Systems, Cesspools & Grease Traps, Lye for Soap-Making, Bio-Safe, Eco-Friendly, Made in USA |
| Item Type Name | Pure Lye Drain Opener |
| Item Weight | 16 ounces |
| Liquid Volume | 1 liters |
| Manufacturer | ComStar International, Inc. |
| Model Number | 30-500 |
| Number of Items | 1 |
| Part Number | 024924305003 |
| Product Benefits | Clears drains quickly, safely, and effectively with a unique bead shape and non-offensive odor. |
| Scent | odorless |
| State of Matter | Solid |
| State of matter | Solid |
| UPC | 024924305003 |
| Unit Count | 16 Ounce |

## Product Details

- **Brand:** ComStar
- **Item Weight:** 16 ounces
- **Product Benefits:** Clears drains quickly, safely, and effectively with a unique bead shape and non-offensive odor.
- **Scent:** odorless
- **State of matter:** Solid

## Images

![Pure Lye 1 lb Drain Opener, 99% Sodium Hydroxide Beads, Soap Maker - Image 1](https://m.media-amazon.com/images/I/81comxs3VkL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: Can I use this for cold process soap making?**
A: I believe so. This should be NaOH, sodium hydroxide. I know people use this to make soap but I don't know if they are making cold process soap........

**Q: Is it safe for Bathtub brass drain and pipe?**
A: All the reviews I read on this said it was ok, and that was my experience.  The shower drain had a metal cover.  Since the product warns DO NOT bring into contact with aluminum, I removed the cover to the drain.  I just didn't have a clue what the cover was made of.  In the sink, I remove the stopper that sits inside the drain for both that reason, and I wanted to be able to pour the lye straight into the drain.  I ran hot water down both for about 5 minutes.  Then I used paper towels to soak and wipe up any water or dampness around the drain.I'm not sure I emphasized it enough, but the only surprise I got was when I opened the bottle of lye itself.  When I removed the cap and started to tip it to put into the measuring cup, the tiny little beads of lye (the size of a pinhead) started to literally jump out of the bottle!!  Just that very little bit that did this is what made me decide to pour it straight fro the bottle down the drain.  Holding the measuring cup next to the bottle its pretty obvious that the bottle contains about 2 cups worth anyway, so I poured a cups worth (half the bottle) down the drain.The sink drain actually filled up to the top of the drain at the sink so I stopped pouring.  The lye just sat there at the top of the drain.  I didn't experience any volcanic outpouring from the drain, but since I read it was possible I decided to turn the measuring cup upside down over the drain just in case.  Then I started to turn the water on ever so carefully.  I had just the slightest amount of water dripping out of the faucet.  I watched it run slowly to the drain and under the measuring cup.  I didn't hear or see any crazy reaction, so I turned the water on ever so gently a little more.  I slowly got to a point of a gentle stream of water and had it go long enough that I felt it would be about a cups worth of water.  I then waited about 10 minutes maybe.  (As you can tell, I didn't go by the directions exactly due to what I had to work with, but I certainly used them as a guide line, and the safety warnings as gospel).  I then ran the water on hot for about 15 minutes, in which the whole time the water went down the drain perfectly and smoothly just as if it was a brand new drain and pipes!!I just used this yesterday and I'm still quite thrilled with how well it worked, especially after how long its been a problem drain, and how many hundreds of dollars we've spent over the years on store bought drain cleaners and local pluming specialists.  I definitely recommend this stuff!!  The only downside I see is that you MUST be VERY CAREFUL as it warns of it coming into contact with skin, eyes, aluminum, and of course water or any other liquid.  Fumes don't seem to be a problem though as long as you don't have your face above the stuff when you're pouring it, or over the drain.  I just left the fan on, the door open, and told everyone to stay out of the bathroom until I say otherwise.Sorry if I rambled on here.  Its just that its been so bad for so long.  I'm definitely ordering another couple of bottles so I can do my other drains.  This stuff really isn't very expensive, especially if you're getting more than one bottle so the shipping isn't as much.  Hope I helped you out a little.  If you have any other questions feel free to ask.  Take care, stay safe, and God bless, Nolan

**Q: Can this be used on a pop-up drain in a bathroom sink?  How would you do that?**
A: Probably only with DIFFICULTY.  My plug wouldn't stay up, SO I had removed it completely LONG ago.  I had unobstructed drain opening to work with.  Suggest you phone HORN PLUMBING, my supplier, at 417-256-5191; ask them, staff knowledgeable and VERY HELPFUL.

**Q: How much of lye do I need to pour to unclog a completely stopped main line?**
A: Not an easy question to answer with certainly.  The blockage in a "Main" line can be caused by tree/plant roots, food and toilet waste and a combination of some or all.  Also, where in the main the blockage is will determine how much Pure Lye to add.  All these are probably unknown.  If the blockage is caused by roots then Pure Lye will not be effective.  We suggest putting in a full one pound bottle into the toilet and flush the toilet several times.  You will have to wait a good hour before you may see some results.  You may have to do this several time but even then there is no guarantee the blockage will be broken up due to the nature of the blockage and where the blockage is.

## Customer Reviews

### ⭐⭐⭐⭐⭐ I'm totally surprised ... and impressed! It WORKED!
*by S***E on May 7, 2013*

I read through other Amazon reviews about this product, so decided to give it a try. I have to say, I'm totally impressed! I had a bathroom drain that was nearly completely clogged up, mostly with hair. Ordinarily, I'd have just pulled out the drain plug, dug the hair out with my hemostats, and been done with it. But this particular plug is unnecessarily difficult to get out, so I thought I'd try something else. My first attempt was with some sort of drain cleaner. Directions said to use half of the bottle, I think there was maybe 1/3 of the bottle left, so I used that. Poured it into the bathtub drain, left it overnight, took a shower the next day and saw no improvement whatsoever. It took 1 inch of water in the bathtub about 40 minutes to drain. Expecting the Lye to perform no better than my drain cleaner, poured it down the drain 4 times, rather than "just" following the directions. I reasoned that perhaps most of the solution would drain PAST the hair clog, and NOT dissolve the clog? So, on the first night, I estimated doing what the directions said, 1 cup of Lye dissolved into 1 to 1 1/2 cups of water. Poured it down the drain. Left it overnight. Next day, made up a small solution - maybe half of what the directions suggested, poured it slowly into the drain. Did that, again, that evening, and, again, the next day. Four days later, I took a shower in that particular shower, and it drained just fine, I couldn't believe it! So, now I'm wondering how much the lye actually worked after only ONE administration, rather than 4. But I'm glad and quite impressed that it really did work. In total, I used about 2/3 of the bottle, with plenty left over for other drains in the house. Of note: Lye is not the nicest stuff to use or have around in your house. I found out that when you mix it with water, it generates heat. I could easily feel the heat through the plastic bucket that I used to mix the solution. Lye will chemically burn your skin, to be careful. Don't let it touch your skin, and be especially careful not to get it into your eyes. Also, according to wikipedia, Lye can pull enough water out of the atmosphere to turn itself into a liquid solution (which generates heat) and can potentially ignite other flammable substances (paint? gasoline? paint thinner?) So I'll use ALL of the remaining Lye in my other household drains, and NOT store it in the house or in the hot garage. Knowing full well that the next time the drain even STARTS to drain SLOWLY, the solution is only one quick visit to Amazon and a couple of days away.

### ⭐⭐⭐⭐⭐ Miracle worker
*by J***S on January 28, 2020*

My kitchen sink backs into my bathroom sink once a year. The plumber says its roots. I dont beleive him. This year, I wasnt spending $700 for them to come out and clear the lines. Since december I have tried zap stuff, twice and it didnt work. I borrowed a snake, snaked thru the entire line, didnt work. I almost gave up and called a plumber but decided to come on Amazon and look at reviews on drain cleaners. This product does NOT disappoint!!! It arrived about 2 hours ago. I heavily armed myself with protective gloves, eyewear and old heavy clothes. (My dad scared the life out of me about this stuff being very dangerous) I read the directions about 40 times before I was confident enough to use it. I really didnt want to burn an arm off or worse, cause my pipes to melt causing me more money that I dont have. Ok. I followed the direction for a slow drain. First I boiled water and sent that down the drain a few times as it says to "warm the pipes up" then I used one cup of this miracle stuff in each drain. It fizzed, hissed and reminded me of the science experiment in middle school of an exploding volcano that only half works... it erupted, slightly. Then all settled and I waited, and waited. I didnt want to jump the gun at just 15 minutes. This was some major clog we were working with. So while I waited, I started boiling water in ever big pot I had on all my burners. Alexa rang and my time was up! I started off pouring the boiling water SLOWLY down the first drain I dropped the product down. Nothing. No fizzing, no exploding. It just kept draining. Shocked. I ran to my kitchen and started dumping water down the drain... surely it would back up into my bathroom sink again... three gallons down the hatch... i run to the bathroom... it's clear! Holy moly! I put this stuff to the test. I run both the sinks hot water full blast down the kitchen sink and bathroom. 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. For weeks I have been stressing about not having the money to fix this, but after spending under 6 bucks on this stuff I am floored. I will NEVER buy any other drain cleaner again and neither should you! This stuff is a game changer!

### ⭐⭐⭐⭐⭐ Spent Hundreds On Other Products. Nothing Cleared The 40-Year Grease Build Up Like This!
*by V***Y on July 23, 2023*

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.

## Frequently Bought Together

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*Product available on Desertcart France*
*Store origin: FR*
*Last updated: 2026-10-07*