---
product_id: 6228747
title: "Roebic HD-CRY-DO-6 2-Pound Heavy Duty Crystal Drain Opener"
brand: "roebic"
price: "€ 33.60"
currency: EUR
in_stock: false
reviews_count: 10
url: https://www.desertcart.ie/products/6228747-roebic-hd-cry-do-6-2-pound-heavy-duty-crystal
store_origin: IE
region: Ireland
---

# 100% Sodium Hydroxide Power Fast-Acting Clog Melter Heavy Duty, Professional Strength Roebic HD-CRY-DO-6 2-Pound Heavy Duty Crystal Drain Opener

**Brand:** roebic
**Price:** € 33.60
**Availability:** ❌ Out of Stock

## Summary

> 🚿 Melt Away Clogs Like a Pro — Because Your Pipes Deserve the Best!

## Quick Answers

- **What is this?** Roebic HD-CRY-DO-6 2-Pound Heavy Duty Crystal Drain Opener by roebic
- **How much does it cost?** € 33.60 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/6228747-roebic-hd-cry-do-6-2-pound-heavy-duty-crystal)

## Best For

- roebic enthusiasts

## Why This Product

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

## Key Features

- • **Save Time, Skip the Plumber:** Clears tough kitchen clogs fast so you stay in control of your home maintenance.
- • **Trusted by Nearly 1,000 Users:** 4.3-star rating proves this is the go-to solution for professional-strength drain care.
- • **Unleash Industrial-Grade Power:** 100% lye formula melts grease and hair blockages with surgical precision.
- • **Designed for Kitchen Excellence:** Specially formulated for kitchen sinks—avoid toilets and sensitive pipes for max safety.
- • **Keep Your Drains Flowing Smoothly:** Regular use prevents buildup, ensuring hassle-free pipes and zero slowdowns.

## Overview

Roebic HD-CRY-DO-6 is a 2-pound heavy-duty crystal drain opener featuring 100% sodium hydroxide for powerful, fast-acting grease and hair clog removal. Ideal for kitchen sinks, it prevents buildup and keeps drains flowing smoothly. Not suitable for toilets or certain metal pipes. Trusted by hundreds with a 4.3-star rating, it’s the professional’s choice for maintaining clear drains.

## Description

desertcart.com: Roebic HD-CRY-DO-6 2-Pound Heavy Duty Crystal Drain Opener : Everything Else

Review: Cut through clogs perfectly - I have a tendency to cut my hair over my bathroom sink. And I was starting to act sluggish, and I thought, possibly because of all the hair that I've been flushing down the sink, so I bought this and just do it every so often to keep the pipes clean and it works great.
Review: Use as directed because it emits drain cleaner smelll - Bathroom drain a problem, this WORKS well

## Features

- Ideal for kitchen clogs. Melts grease, keeps drains clear, tackles tough kitchen blockages
- Professional Strength Crystal Drain Opener clears tough clogs from pipes and drains, saving you time and money
- 100% Lye. Contains sodium hydroxide. Not for use in toilets or garbage disposals. Avoid use with aluminium, lead, zinc, or galvanized pipes
- Follow label instructions for optimal results with Roebic Heavy Duty Crystal Drain Opener
- Contains 100% sodium hydroxide for powerful clog-clearing action. Keep drains and pipes free-flowing

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN  | B00BH34MEY |
| Best Sellers Rank | #129,463 in Health & Household ( See Top 100 in Health & Household ) #235 in Chemical Drain Openers |
| Customer Reviews | 4.3 4.3 out of 5 stars (988) |
| Date First Available  | February 11, 2013 |
| Is Discontinued By Manufacturer  | No |
| Item model number  | HD-CRY-DO |
| Manufacturer  | Roebic Laboratories |
| Product Dimensions  | 2.25 x 4.5 x 7.75 inches; 2 Pounds |

## Product Details

- **Brand:** Roebic
- **Item Weight:** 2 Pounds
- **Product Benefits:** Cleans Drain, Eliminates Odor, Melts grease, clears clogs, and keeps drains clear, Removes Clog
- **Scent:** Unscented
- **State of matter:** Solid

## Images

![Roebic HD-CRY-DO-6 2-Pound Heavy Duty Crystal Drain Opener - Image 1](https://m.media-amazon.com/images/I/71CNm2YzEbL.jpg)
![Roebic HD-CRY-DO-6 2-Pound Heavy Duty Crystal Drain Opener - Image 2](https://m.media-amazon.com/images/I/81ryP-FDSWL.jpg)
![Roebic HD-CRY-DO-6 2-Pound Heavy Duty Crystal Drain Opener - Image 3](https://m.media-amazon.com/images/I/81vttRw98vL.jpg)
![Roebic HD-CRY-DO-6 2-Pound Heavy Duty Crystal Drain Opener - Image 4](https://m.media-amazon.com/images/I/81I-VlGSD4L.jpg)
![Roebic HD-CRY-DO-6 2-Pound Heavy Duty Crystal Drain Opener - Image 5](https://m.media-amazon.com/images/I/81LFDir67-L.jpg)

## Available Options

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

## Questions & Answers

**Q: The bottle says 100% lye, and reviewers have said the msds sheet confirms, but when i look at the msds it states 96-100%. did it change? or what gives**
A: 96% is about right for industrial-grade chemicals.  To get 100% you need reagent grade and will pay for it.  So this is lye suitable for non-technical purposes.

**Q: Is this cleaner harmful to plastic drain pipes?**
A: In the short term probably not because there is no warning on the container about such a risk.  Plus, when I make soap, I dissolve the lye in a plastic bucket, one that I have dedicated to lye solution for soapmaking.  I have used the same bucket for a number of years, with no holes forming in it.  It is possible that over a period of decades it might be affected.  However, when I make lye solution for soapmaking, the solution sits in the same bucket for at least 30 minutes, sometimes longer, whereas drain cleaners are meant to go in and do their job, then get flushed away.  So I believe it is highly likely that this drain cleaner will not harm plastic drain pipes.

**Q: Will this product kill the good bacteria in the septic system?**
A: It is likely that Roebic lye crystals will kill the good bacteria in a septic system.  It would depend on how much lye you pour down the drain or toilet, and the size of your system, and possibly other factors.  I am fairly certain I have read more than once that lye is not to be used in septic systems which rely on living organisms to break down sewage.
If it is too late and you have used it and killed the living organisms, there is a product you can buy that is supposed to help recolonize or repopulate the system with good microorganisms.  Rid-X is one such product.  Good luck.

**Q: How many cups are in this 60 ounce container?**
A: According to my scale: 
1 cup of Roebic lye crystals weighs 9.6 ounces (oz)
2 cup Roebic lye crystals weighs 19.2 ounces (oz)
so 60 ounces (oz) should give you 6.25 cups.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Cut through clogs perfectly
*by S***S on December 23, 2025*

I have a tendency to cut my hair over my bathroom sink. And I was starting to act sluggish, and I thought, possibly because of all the hair that I've been flushing down the sink, so I bought this and just do it every so often to keep the pipes clean and it works great.

### ⭐⭐⭐⭐⭐ Use as directed because it emits drain cleaner smelll
*by T***N on November 26, 2025*

Bathroom drain a problem, this WORKS well

### ⭐⭐⭐⭐ Very strong, goes a long way, be CAREFUL!!!
*by E***E on October 23, 2020*

I had a stubborn clogged drain. Ordinary liquid drain cleaners did nothing to clear it; neither did a 50 foot plumbing snake. So I bought this Roebic concentrated sodium hydroxide. I planned to drop a few teaspoons down the drain. Wearing no protective gear. Oops. I accidentally spilled a LOT MORE (quarter cup?) on the measuring spoon. And the drain. And the water in it. WHOOSH. YOWWWW -- as the geyser hit the back of my ungloved left hand. The world turned white. Worst pain I've ever felt, worse than getting hit by a car, worse than watching the 2016 election. The sodium hydroxide was boiling the fat under the skin. Fun fact 1: the "heat of solution" of sodium hydroxide is about 1000 calories per gram of NaOH. 600 calories turns a gram of water into steam, Right Now Only. Fun fact 2: A quarter cup of NaOH is more than 100 grams. Fun fact 3: Soap can be made with sodium hydroxide plus animal fat. I grabbed some lemon juice from the fridge, and poured that on my hand - over a different sink. Weak acid neutralises alkali - fizz instead of boiling. Followed by a few hours alternately drying and soaking my hand in a weak solution of salt and lemon juice. Followed by a couple of weeks of salve, absorbent medical pads, and Coban tape. An oversized cloth glove is better for holding pads in place over a hand than Coban. Two months later, the hand is painless, the loose skin is healed and not too ugly, and I could type the letters on the left side of this keyboard. And the drain stopped up again. Episode 2: I used the drain line cleanout port in the basement. I dressed "full moon suit" - a surplus cleanroom suit with an actual helmet and air hose! - and wore heavy gloves, and tall boots with the pants cuffs OVER the top of the boots. Newspaper covering all surfaces nearby. I /carefully/ and /slowly/ measured out spoonfuls of the recommended amount of Roebic into a small bowl (with a flat bottom so it wouldn't tip), then /slowly/ spooned that into the cleanout port. No eruption, very anticlimactic ... thank goodness. Now the drain runs fine, and we treat it often with weaker (and safer) drain cleaners. Roebic is the 900 pound gorilla of drain cleaners. You should treat it like the variety of gorilla with a flamethower and hand grenades. If you are very careful, Roebic will do an excellent job of clearing clogs that are resistant to everything else. Treat the whole bottle of concentrated firepower like belt of hand grenades in a bad war movie. My one bottle will probably last for life, and certainly will last until the plague ends, when it is safe to bring in a crew to dig up and replace the drain line. I hope the Roebic product is available for a long time, and that they have very good liability lawyers, and that all you other customers are more careful and responsible than I was. Skip episode one, start with episode two.

## Frequently Bought Together

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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-02-27*