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Best Caustic Soda Crystals For Drains of 2026
Last updated on 05/05/2026
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1
5 Kg Drain Unblocker | Caustic Soda | Professional Grade Drain Cleaner, Commercial Kitchen Degreaser, Soap & Chemical Manufacturing, Textile & Water Treatment Use | 5Kg
Thomas Bewick
Why we love it
High purity ensures reliable performance.
Dissolves tough blockages quickly.
Versatile for multiple industries.
Main Highlights
High Purity 98% Drain Cleaner – Bulk 5kg pack for reliable industrial use.
Powerful Drain & Pipeline Cleaner – Dissolves grease, oils, and blockages fast.
Essential for Soap & Chemical Manufacturing – Key ingredient for saponification and chemical processing.
Versatile Industrial Applications – Trusted in textile, metal processing, and water treatment industries.
Commercial Kitchen Degreaser – Cleans stainless steel sinks, ovens, and equipment effectively.
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9.8
Exceptional
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9.8
Exceptional
Thomas Bewick
5 Kg Drain Unblocker | Caustic Soda | Professional Grade Drain Cleaner, Commercial Kitchen Degreaser, Soap & Chemical Manufacturing, Textile & Water Treatment Use | 5Kg
Check Price
Show More
Why we love it
High purity ensures reliable performance.
Dissolves tough blockages quickly.
Versatile for multiple industries.
Main Highlights
High Purity 98% Drain Cleaner – Bulk 5kg pack for reliable industrial use.
Powerful Drain & Pipeline Cleaner – Dissolves grease, oils, and blockages fast.
Essential for Soap & Chemical Manufacturing – Key ingredient for saponification and chemical processing.
Versatile Industrial Applications – Trusted in textile, metal processing, and water treatment industries.
Commercial Kitchen Degreaser – Cleans stainless steel sinks, ovens, and equipment effectively.
Show More
Value for Money
2
Powerful Caustic Soda Drain Cleaner | Effective Clog Remover, Industrial Strength Formula, Fast Action (3 X 375gm) (Packaging may vary)
EasyClean
Why we love it
Generous 1125gm total quantity.
Convenient 3-bottle packaging.
Simple delivery information.
Main Highlights
Product Quantity : 1125gm (375g x 3 Bottles) , & 1 KG
Delivry nfo : We cannot deliver certain products outside mainland UK ( Details). We will only be able to confirm if this product can be delivered to your chosen address when you enter your delivery address at checkout.
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9.7
Exceptional
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9.7
Exceptional
EasyClean
Powerful Caustic Soda Drain Cleaner | Effective Clog Remover, Industrial Strength Formula, Fast Action (3 X 375gm) (Packaging may vary)
Check Price
Show More
Why we love it
Generous 1125gm total quantity.
Convenient 3-bottle packaging.
Simple delivery information.
Main Highlights
Product Quantity : 1125gm (375g x 3 Bottles) , & 1 KG
Delivry nfo : We cannot deliver certain products outside mainland UK ( Details). We will only be able to confirm if this product can be delivered to your chosen address when you enter your delivery address at checkout.
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3
5 Kg Drain Unblocker | Caustic Soda | Professional Grade Drain Cleaner, Commercial Kitchen Degreaser, Soap & Chemical Manufacturing, Textile & Water Treatment Use | 5Kg
MULTEX CHEMICALS LTD
Main Highlights
Pearl Spark Caustic Soda (5kg) is a high-purity 98% Industrial-Strength Cleaning: Effectively clears commercial drains, pipelines, and grease traps. Manufacturing Essential: Widely used in soap making, chemical processing, and biodiesel production. Commercial Kitchens: Perfect for cleaning stainless steel sinks, ovens, and heavy-duty equipment. Textile & Metal Industry: Supports mercerising, dye fixing, and surface preparation in factories. Water Treatment: Reliable pH control and neutralisation of acidic effluents. ⚠️ Safety Notice: Corrosive product – always wear protective gloves and goggles. For professional and industrial use .
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9.6
Superb
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9.6
Superb
MULTEX CHEMICALS LTD
5 Kg Drain Unblocker | Caustic Soda | Professional Grade Drain Cleaner, Commercial Kitchen Degreaser, Soap & Chemical Manufacturing, Textile & Water Treatment Use | 5Kg
Check Price
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Main Highlights
Pearl Spark Caustic Soda (5kg) is a high-purity 98% Industrial-Strength Cleaning: Effectively clears commercial drains, pipelines, and grease traps. Manufacturing Essential: Widely used in soap making, chemical processing, and biodiesel production. Commercial Kitchens: Perfect for cleaning stainless steel sinks, ovens, and heavy-duty equipment. Textile & Metal Industry: Supports mercerising, dye fixing, and surface preparation in factories. Water Treatment: Reliable pH control and neutralisation of acidic effluents. ⚠️ Safety Notice: Corrosive product – always wear protective gloves and goggles. For professional and industrial use .
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4
Priceless Discounts Online Caustic Soda Drain Cleaner (6x 500g) | Sink Unblocker Powder | Industrial Use
Breez
Why we love it
Handy 6 pack included.
Original and best cleaner.
Gets the job done.
Main Highlights
HANDY 6 PACK: You will receive 6 bottles (500g each), keep your cupboard stocked up and have this product ready to use when you need it!
ORIGINAL IS BEST: Original and best drain cleaner, don’t buy multiple brands, stick with the original and you won’t be disappointed.
GETS THE JOB DONE: Heavy duty cleaner drain unblocker, for commercial, personal and industrial use.
EASY USE: To clean a drain mix 100g of Drain Cleaner with 1 litre of cold water and, avoiding contact with eyes and skin, pour the entire solution down the drain.
CLEANS AND UNBLOCKS: To unblock a drain, mix 100g of Drain Cleaner with 1 litre of cold water, pour the solution down the drain, and wait for 30 mins.
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9.5
Superb
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9.5
Superb
Breez
Priceless Discounts Online Caustic Soda Drain Cleaner (6x 500g) | Sink Unblocker Powder | Industrial Use
Check Price
Show More
Why we love it
Handy 6 pack included.
Original and best cleaner.
Gets the job done.
Main Highlights
HANDY 6 PACK: You will receive 6 bottles (500g each), keep your cupboard stocked up and have this product ready to use when you need it!
ORIGINAL IS BEST: Original and best drain cleaner, don’t buy multiple brands, stick with the original and you won’t be disappointed.
GETS THE JOB DONE: Heavy duty cleaner drain unblocker, for commercial, personal and industrial use.
EASY USE: To clean a drain mix 100g of Drain Cleaner with 1 litre of cold water and, avoiding contact with eyes and skin, pour the entire solution down the drain.
CLEANS AND UNBLOCKS: To unblock a drain, mix 100g of Drain Cleaner with 1 litre of cold water, pour the solution down the drain, and wait for 30 mins.
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5
Sodium Hydroxide, Caustic soda powder, Lye for soap making, Sink unblocker the best drain cleaners and unblockers, Strongest toilet unblocker, kitchen sink unblocker, drain cleaner, sink cleaner, 1KG
Spartax
Why we love it
Great for soap making.
Essential for detergent production.
Keeps pipes clear efficiently.
Main Highlights
a. Soap making supplies. Sodium hydroxide powder is crucial in soap and detergent production. Great for soap making kit. Lye for soap making, soap base.
b. Drain unblocker and sink unblocker combine with toilet unblocker for complete clog resolution. Shower drain unblocker and kitchen sink unblocker ensure smooth water flow.
c. Use caustic soda drain unblocker and heavy duty drain unblocker for tough blockages. Outdoor drain unblocker and bathroom sink unblocker target specific areas effectively.
d. Toilet unblocker heavy duty pairs with sink and drain cleaner for powerful cleaning. Drain hair remover and plughole unblocker offer targeted solutions to keep pipes clear.
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9.3
Superb
Check Price
9.3
Superb
Spartax
Sodium Hydroxide, Caustic soda powder, Lye for soap making, Sink unblocker the best drain cleaners and unblockers, Strongest toilet unblocker, kitchen sink unblocker, drain cleaner, sink cleaner, 1KG
Check Price
Show More
Why we love it
Great for soap making.
Essential for detergent production.
Keeps pipes clear efficiently.
Main Highlights
a. Soap making supplies. Sodium hydroxide powder is crucial in soap and detergent production. Great for soap making kit. Lye for soap making, soap base.
b. Drain unblocker and sink unblocker combine with toilet unblocker for complete clog resolution. Shower drain unblocker and kitchen sink unblocker ensure smooth water flow.
c. Use caustic soda drain unblocker and heavy duty drain unblocker for tough blockages. Outdoor drain unblocker and bathroom sink unblocker target specific areas effectively.
d. Toilet unblocker heavy duty pairs with sink and drain cleaner for powerful cleaning. Drain hair remover and plughole unblocker offer targeted solutions to keep pipes clear.
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6
ProHome Caustic Soda Drain Unblocker 1125g (375g x 3 Pack) – Max Strength Caustic Soda Crystals, Powerful Drain Cleaner, Fast-Acting Clog Remover, Industrial Strength Formula
Pro Home
Main Highlights
✅ Fast-Acting Caustic Soda Drain Unblocker: Specially formulated ProHome caustic soda drain unblocker quickly dissolves grease, hair, and soap scum. Powered by max strength caustic soda (sodium hydroxide), it restores smooth water flow and clears stubborn blockages with ease.
✅ Value Pack – 3 Bottles (1125g Total): Includes 3 x 375g bottles of caustic soda, giving you a generous supply for multiple uses. Ideal for households and light commercial use needing a reliable caustic soda solution.
✅ Multi-Purpose & Versatile Use: Perfect for bathroom sinks, kitchen drains, showers, and even commercial drainage systems. This caustic soda crystals and powder formula offers reliable performance across a wide range of drain cleaning needs.
✅ Powerful Caustic Soda Drain Cleaner Formula: This industrial-strength caustic soda drain cleaner works deep inside pipes to break down tough clogs. Ideal as a sink drain cleaner, shower drain unblocker, and heavy-duty solution for blocked drains.
✅ Easy & Effective Application: Simply follow step-by-step instructions—measure and pour the recommended amount into the affected drain. Allow the formula to work, then flush with water for a complete and effective cleaning process.
✅ Safety First – Use with Care: Always wear protective gloves and goggles when using this caustic soda cleaner. Ensure proper ventilation by opening windows or using exhaust fans. Keep out of reach of children and pets for safe storage.
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9.2
Superb
Check Price
9.2
Superb
Pro Home
ProHome Caustic Soda Drain Unblocker 1125g (375g x 3 Pack) – Max Strength Caustic Soda Crystals, Powerful Drain Cleaner, Fast-Acting Clog Remover, Industrial Strength Formula
Check Price
Show More
Main Highlights
✅ Fast-Acting Caustic Soda Drain Unblocker: Specially formulated ProHome caustic soda drain unblocker quickly dissolves grease, hair, and soap scum. Powered by max strength caustic soda (sodium hydroxide), it restores smooth water flow and clears stubborn blockages with ease.
✅ Value Pack – 3 Bottles (1125g Total): Includes 3 x 375g bottles of caustic soda, giving you a generous supply for multiple uses. Ideal for households and light commercial use needing a reliable caustic soda solution.
✅ Multi-Purpose & Versatile Use: Perfect for bathroom sinks, kitchen drains, showers, and even commercial drainage systems. This caustic soda crystals and powder formula offers reliable performance across a wide range of drain cleaning needs.
✅ Powerful Caustic Soda Drain Cleaner Formula: This industrial-strength caustic soda drain cleaner works deep inside pipes to break down tough clogs. Ideal as a sink drain cleaner, shower drain unblocker, and heavy-duty solution for blocked drains.
✅ Easy & Effective Application: Simply follow step-by-step instructions—measure and pour the recommended amount into the affected drain. Allow the formula to work, then flush with water for a complete and effective cleaning process.
✅ Safety First – Use with Care: Always wear protective gloves and goggles when using this caustic soda cleaner. Ensure proper ventilation by opening windows or using exhaust fans. Keep out of reach of children and pets for safe storage.
Show More
7
2Kg Caustic Soda Drain Cleaners & Unblockers Powder Kitchen Sink & Drain Cleaner Effectively Clears Blocked Drains Also Use For Cleaning Pathways Driveways Exterior & Brickwork (2x 1Kg)
DTD QUALITY MATTERS
Why we love it
Unblocks drains effortlessly.
Versatile heavy-duty cleaner.
Available in convenient sizes.
Main Highlights
Ideal for cleaning and unblocking drains and sinks Suitable for exterior drains.
Essential Power Caustic Soda is a general purpose heavy duty cleaner, degreaser and sanitizer for home and industrial use.
Easy to use.General cleaning and sanitizing
Cleaning paths, drives and brickwork
Available in a 1kg and 500g bottle
Method of application: Add 100g Caustic Soda to 1L of cold water. Stir until completely dissolved and then pour entire contents down the drain.
Caveat: Keep locked away and out of reach of children.
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9.1
Superb
Check Price
9.1
Superb
DTD QUALITY MATTERS
2Kg Caustic Soda Drain Cleaners & Unblockers Powder Kitchen Sink & Drain Cleaner Effectively Clears Blocked Drains Also Use For Cleaning Pathways Driveways Exterior & Brickwork (2x 1Kg)
Check Price
Show More
Why we love it
Unblocks drains effortlessly.
Versatile heavy-duty cleaner.
Available in convenient sizes.
Main Highlights
Ideal for cleaning and unblocking drains and sinks Suitable for exterior drains.
Essential Power Caustic Soda is a general purpose heavy duty cleaner, degreaser and sanitizer for home and industrial use.
Easy to use.General cleaning and sanitizing
Cleaning paths, drives and brickwork
Available in a 1kg and 500g bottle
Method of application: Add 100g Caustic Soda to 1L of cold water. Stir until completely dissolved and then pour entire contents down the drain.
Caveat: Keep locked away and out of reach of children.
Show More
8
Max Strength Caustic Soda 1kg – Premium Grade Caustic Soda Pearl Granules, Powerful Sink Unblocker & Degreaser
Max
15% Off
Limited time deal
Why we love it
Powerful cleaning for tough stains.
Unblocks drains effectively and quickly.
Perfect for homemade soap crafting.
Main Highlights
MAX STRENGTH CAUSTIC SODA - A traditional product that is suitable for a range of cleaning tasks. Caustic Soda degreases and cleans drains, toilets, paths, concrete, brickwork and dustbins.
EFFECTIVE DRAIN UNBLOCKER – Simply add 50g to 1L of cold water in a plastic container. Stir constantly, the solution will heat up. Carefully pour entire solution down the drain. Leave for 30min then flush with hot water.
GENERAL CLEANING & DEGREASING – Simply add 25g to 1L of cold water in a plastic container. Stir constantly, solution will heat up. Allow to cool before use. After application, wash area thoroughly with cold water.
SUITABLE FOR SOAP MAKING - Premium Grade Sodium Hydroxide Caustic Soda Pearl Granules.
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9.0
Superb
Check Price
9.0
Superb
Max
Max Strength Caustic Soda 1kg – Premium Grade Caustic Soda Pearl Granules, Powerful Sink Unblocker & Degreaser
15% Off
Limited time deal
Check Price
Show More
Why we love it
Powerful cleaning for tough stains.
Unblocks drains effectively and quickly.
Perfect for homemade soap crafting.
Main Highlights
MAX STRENGTH CAUSTIC SODA - A traditional product that is suitable for a range of cleaning tasks. Caustic Soda degreases and cleans drains, toilets, paths, concrete, brickwork and dustbins.
EFFECTIVE DRAIN UNBLOCKER – Simply add 50g to 1L of cold water in a plastic container. Stir constantly, the solution will heat up. Carefully pour entire solution down the drain. Leave for 30min then flush with hot water.
GENERAL CLEANING & DEGREASING – Simply add 25g to 1L of cold water in a plastic container. Stir constantly, solution will heat up. Allow to cool before use. After application, wash area thoroughly with cold water.
SUITABLE FOR SOAP MAKING - Premium Grade Sodium Hydroxide Caustic Soda Pearl Granules.
Show More
9
Powerful Drain Cleaner & Unblocker l 1KG Caustic Soda | Fast-Acting, Heavy-Duty Sink & Drain Cleaner | Strong & Effective | The Original & Best l Works 3x Better Than Bleach (Packaging Varies)
The Retail Heaven
Why we love it
Please provide a product description for me to generate the "Why we Love It" section.
Main Highlights
Drain cleaners and unblockers 1KG Caustic Soda Drain Cleaner Caustic Soda Powder Sink and Drain cleaner strong the original and best drain cleaner kitchen drain unblocker
Brand : Generic
Product type: DRAIN OPENER SUBSTANCE
Show More
8.8
Excellent
Check Price
8.8
Excellent
The Retail Heaven
Powerful Drain Cleaner & Unblocker l 1KG Caustic Soda | Fast-Acting, Heavy-Duty Sink & Drain Cleaner | Strong & Effective | The Original & Best l Works 3x Better Than Bleach (Packaging Varies)
Check Price
Show More
Why we love it
Please provide a product description for me to generate the "Why we Love It" section.
Main Highlights
Drain cleaners and unblockers 1KG Caustic Soda Drain Cleaner Caustic Soda Powder Sink and Drain cleaner strong the original and best drain cleaner kitchen drain unblocker
Brand : Generic
Product type: DRAIN OPENER SUBSTANCE
Show More
10
1KG Caustic Soda Unblocker Sink and Pipe Cleaner Powder Remove Blockages Quickly and Conveniently Bathroom Unblocker, Cleaner for Kitchen Sink Shower Toilet Maintenance
Tara
9% Off
Why we love it
Efficient grease and scum dissolution.
Versatile for diverse drain types.
Promotes smooth water flow restoration.
Main Highlights
Specially formulated, the shower drain unblocker efficiently dissolves grease, hair, and soap scum. Thanks to its key ingredient, caustic soda (sodium hydroxide), it restores smooth water flow in the drain.
Follow the step-by-step instructions to ensure safe and effective usage. Never forget to wear the appropriate protective gear, such as gloves and goggles, before using the product.
Whether you're facing a clogged bathroom sink, kitchen drain, or a more extensive commercial setup, this product can handle them all due to its versatility.
To ensure adequate ventilation, open windows or use exhaust fans in the area where you'll be using the sink drain cleaner. Carefully measure and pour the recommended amount of the drain and sink cleaner into the affected drain or sink.
Follow the suggested waiting time before flushing the drain with water to complete the cleaning process effectively. Important: Keep the product out of reach from kids and pets by storing it in a safe and designated spot.
Show More
8.7
Excellent
Check Price
8.7
Excellent
Tara
1KG Caustic Soda Unblocker Sink and Pipe Cleaner Powder Remove Blockages Quickly and Conveniently Bathroom Unblocker, Cleaner for Kitchen Sink Shower Toilet Maintenance
9% Off
Check Price
Show More
Why we love it
Efficient grease and scum dissolution.
Versatile for diverse drain types.
Promotes smooth water flow restoration.
Main Highlights
Specially formulated, the shower drain unblocker efficiently dissolves grease, hair, and soap scum. Thanks to its key ingredient, caustic soda (sodium hydroxide), it restores smooth water flow in the drain.
Follow the step-by-step instructions to ensure safe and effective usage. Never forget to wear the appropriate protective gear, such as gloves and goggles, before using the product.
Whether you're facing a clogged bathroom sink, kitchen drain, or a more extensive commercial setup, this product can handle them all due to its versatility.
To ensure adequate ventilation, open windows or use exhaust fans in the area where you'll be using the sink drain cleaner. Carefully measure and pour the recommended amount of the drain and sink cleaner into the affected drain or sink.
Follow the suggested waiting time before flushing the drain with water to complete the cleaning process effectively. Important: Keep the product out of reach from kids and pets by storing it in a safe and designated spot.
Show More
