---
product_id: 12126117
title: "Pure Lye 1 lb - Unique Sodium Hydroxide Beads | Drain Opener & Soap Making | Biodegradable, Eco-Friendly (30-500)"
brand: "comstar"
price: "$U1911"
currency: UYU
in_stock: true
reviews_count: 8
category: "Com Star"
url: https://www.desertcart.uy/products/12126117-pure-lye-1-lb-unique-sodium-hydroxide-beads-drain-opener
store_origin: UY
region: Uruguay
---

# 99% pure sodium hydroxide beads Eco-friendly & biodegradable formula Unique bead shape for fast clog dissolution Pure Lye 1 lb - Unique Sodium Hydroxide Beads | Drain Opener & Soap Making | Biodegradable, Eco-Friendly (30-500)

**Brand:** comstar
**Price:** $U1911
**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 - Unique Sodium Hydroxide Beads | Drain Opener & Soap Making | Biodegradable, Eco-Friendly (30-500) by comstar
- **How much does it cost?** $U1911 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.uy](https://www.desertcart.uy/products/12126117-pure-lye-1-lb-unique-sodium-hydroxide-beads-drain-opener)

## 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

- • **Safe & Odorless:** No fumes, no stink—just clean drains and peace of mind for your home or business.
- • **Eco-Conscious Cleaning:** Biodegradable, non-acid formula that’s tough on clogs but gentle on your pipes and planet.
- • **Dual-Purpose Powerhouse:** Trusted by pros and crafters alike—perfect for clearing drains and crafting premium soap.
- • **Precision Bead Technology:** Static-free, quick-dissolving beads sink deep to target blockages fast and effectively.
- • **Industrial-Strength Purity:** Experience the power of 99% pure sodium hydroxide beads for unbeatable drain clearing.

## Overview

ComStar Pure Lye delivers industrial-strength, 99% pure sodium hydroxide in unique biodegradable beads that dissolve quickly and safely. Designed to clear tough clogs in drains, grease traps, and septic systems without harming pipes or fixtures, it’s also a favorite among soap makers for its static-free, fast-dissolving formula. Odorless and eco-friendly, this product is trusted in homes, schools, and commercial kitchens for reliable, maintenance-friendly drain care.

## 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: AMAZING PRODUCT!! WELL WORTH THE PRICE!! - I was amazed how this product worked on my slow moving bathtub/shower drain! I had tried snaking it, plunging it, liquid drain cleaner...nothing helped until this. I watched the videos people posted and thought what the heck, I'll give it a try. Ran hot water for a minute, waited 10 minutes, poured 1/4 cup directly into the drain, added more hot water, saw 1 bubble (burp) waited, repeat ran hot water 1 minute, 10 minutes later added the beads, little more hot water...finally drain opened up completely. Will use as a monthly maintenance to keep functioning.
Review: It will clear your drain - I have four bathroom vanities, one kitchen sink (open drian and garbage disposal sides) as well as a utility sink. In addition to multiple shower drains, a soaker tub drain and a jetted garden tub drain. It's easy to see that with all of these drains, something will eventually need your attention. Sink drains provide relatively easy access to the trap and with a modest amount of effort they can be cleaned out manually. If however the clogg goes far beyond the trap the repair gets a little more intense. Of course shower and tub drains typically don't have easy access to their drain plumbing. This is the answer for these scenarios. Not only will it open up the drains, it will do so quickly and as an added benefit it will help to keep things downstream from clogging in the first place. I have also found that it works well in laundry drains where soap scum and fabric softener buildup can become problematic. It can be used preventatively in utility drains such as HVAC A Coil condensate drains. Who wants to find their AC system shutting down because the condensate tray is backing up? Or worse yet, find out that the system didn't shut down but instead overflowed onto your carpet, hardwood or even worse, into your ceiling if the unit is upstairs or attic located. This stuff works well for opening clogged drains quickly and preventing clogs when used as a maintenance aid. I typically by this in either the large container or in two packs as I want to have it on hand when needed. I also restock quickly when low.

## Features

- 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.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN  | B00PKNBK24 |
| Best Sellers Rank | #43,611 in Health & Household ( See Top 100 in Health & Household ) #17 in Commercial Drain Openers #94 in Chemical Drain Openers |
| Customer Reviews | 4.6 4.6 out of 5 stars (6,928) |
| Date First Available  | January 16, 2007 |
| Is Discontinued By Manufacturer  | No |
| Item model number  | 30-500 |
| Manufacturer  | ComStar International, Inc. |
| Material Feature  | Biodegradable Warning |
| Product Dimensions  | 3 x 3 x 5.75 inches; 1 Pounds |

## Product Details

- **Brand:** ComStar
- **Item Weight:** 1 Pounds
- **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 - Unique Sodium Hydroxide Beads | Drain Opener & Soap Making | Biodegradable, Eco-Friendly (30-500) - 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

### ⭐⭐⭐⭐⭐ AMAZING PRODUCT!! WELL WORTH THE PRICE!!
*by S***A on January 7, 2026*

I was amazed how this product worked on my slow moving bathtub/shower drain! I had tried snaking it, plunging it, liquid drain cleaner...nothing helped until this. I watched the videos people posted and thought what the heck, I'll give it a try. Ran hot water for a minute, waited 10 minutes, poured 1/4 cup directly into the drain, added more hot water, saw 1 bubble (burp) waited, repeat ran hot water 1 minute, 10 minutes later added the beads, little more hot water...finally drain opened up completely. Will use as a monthly maintenance to keep functioning.

### ⭐⭐⭐⭐⭐ It will clear your drain
*by S***T on September 9, 2025*

I have four bathroom vanities, one kitchen sink (open drian and garbage disposal sides) as well as a utility sink. In addition to multiple shower drains, a soaker tub drain and a jetted garden tub drain. It's easy to see that with all of these drains, something will eventually need your attention. Sink drains provide relatively easy access to the trap and with a modest amount of effort they can be cleaned out manually. If however the clogg goes far beyond the trap the repair gets a little more intense. Of course shower and tub drains typically don't have easy access to their drain plumbing. This is the answer for these scenarios. Not only will it open up the drains, it will do so quickly and as an added benefit it will help to keep things downstream from clogging in the first place. I have also found that it works well in laundry drains where soap scum and fabric softener buildup can become problematic. It can be used preventatively in utility drains such as HVAC A Coil condensate drains. Who wants to find their AC system shutting down because the condensate tray is backing up? Or worse yet, find out that the system didn't shut down but instead overflowed onto your carpet, hardwood or even worse, into your ceiling if the unit is upstairs or attic located. This stuff works well for opening clogged drains quickly and preventing clogs when used as a maintenance aid. I typically by this in either the large container or in two packs as I want to have it on hand when needed. I also restock quickly when low.

### ⭐⭐⭐⭐⭐ Works great!!!
*by C***L on December 16, 2025*

This product is amazing!!! I’ve used it intermittently over the past 10+ years, and it’s always worked great for me. I used it in a home we bought new, and it worked so well I never needed to ask my husband to help with a slow drain. We eventually moved into an older home with a septic tank, and my husband’s retired now, so when he noticed a slow drain, he tried Drano, with minimal success. I ordered this, as it’s no longer available in stores in my area, and it worked like magic! My husband was so impressed! It’s easy to use, and the effects last! I would recommend this to everyone! It’s definitely worth the money!

## Frequently Bought Together

- 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 available on Desertcart Uruguay*
*Store origin: UY*
*Last updated: 2026-02-23*