10 Best Drain Unblocker Sink Drain Cleaner Fast Acting Heavy Duty Drain in The UK

Last updated on 23/08/2025

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Best Choice

9.7

Exceptional

Spear & Jackson

Spear Jackson Heavy Duty Sink and Drain Unblocker Gel - Powerful Formula- Indoor and Outdoor, 5 l (Pack of 1)

Why We Love It

Effective on tough blockages.
Safe for all pipes.
Experienced, reputable brand.

Main Highlights

SPEAR & JACKSON CLEANING PRODUCTS: Since 1760 Spear and Jackson has been selling hand, garden, contractors, agricultural, landscaping and professional tools from its base in the city of Sheffield. Their range of cleaning products are made to target tough stains, grease, grim and fat. Their Heavy Duty Outdoor Drain Unblocker Gel is designed to clear any deposits that are blocking your sink, leaving it draining smoothly
SINK UNBLOCKER LIQUID GEL: Spear and Jackson's Heavy Duty Sink And Drain Unblocker comes in gel form and is designed to dissolve the fat, food, hair or soap residue build up that's blocking your sink. Their heavy duty sink and drain unblocker gel will instantly clear and dissolve the unwanted blockage, and with the sink freshener element of the gel, your sink will be look and smell brand new
BATHROOM & KITCHEN SINK UNBLOCKER: With no drain snake require, this product really couldn't be any easier to use. The gel will dissolve any build up that is causing a blockage in your sink or drain in 3 hours. Ideal for the kitchen or bathroom sink, however this Heavy Duty Sink & Drain Unblocker works on exterior drains just as well. In comparison to other drain cleaners and unblockers on the market, this product has a powerful formulation that achieves results in rapid speed
BATHROOM CLEANING PRODUCTS: Spear and Jackson's fast acting, powerful and effective sink and drain unblocker liquid is perfectly safe to use on all pipe types. For the best results, pour the heavy duty drain unblocker down the plughole, leave for a minimum of 3 hours (preferably overnight) and finish off by flushing the drain with hot water for at least 2 minutes to completely free any blockages - it's really that easy!
SPEAR & JACKSON: With over 250 years experience and continuous innovation, Spear and Jackson have built an enviable reputation with their market leading products that offer high quality performance tools to suit a wide range of needs. Whether you're looking to unblock your sink drain or a concentrated mould, algae and moss spray then shop Spear and Jackson range of versatile, effective and long lasting cleaning products

Inovix® 5 Litre Heavy Duty Drain Unblocker | Sink Unblocker | Fast-Acting Solution for Sinks, Toilets, Showers Removes Hair & Sludge | Industrial Drain Unblocker Ideal For Indoor And Outdoor Drains

Why We Love It

Powerful unblocker for tough clogs.
Fast-acting formula for quick results.
Safe for all pipe types.

Main Highlights

✅ Powerful Drain Unblocker for Home & Commercial Use – Inovix heavy duty drain unblocker tackles even the toughest blockages. Designed for sinks, toilets, showers, and bathroom drains, it restores fast-flowing water in minutes.
✅ Fast-Acting Sink & Shower Drain Unblocker – Say goodbye to standing water! This powerful sink unblocker liquid formula gets to work quickly, dissolving hair, soap scum, and sludge in kitchen sinks, plugholes, and bathroom drains.
✅ Eliminates Bad Smells & Keeps Drains Fresh –Removes Odours & Freshens Pipes This strong drain cleaner not only unblocks but also deodorises. Idle Drain cleaner for bad smells lingering odours caused by sludge, stagnant water, and food debris.
✅ Multi-Purpose & Pipe Safe Formula – Use in bathrooms, kitchens, garages, shops, and more. Safe for ceramic, metal , plastic pipes, and septic tanks too, making it your go-to outdoor drain unblocker tool for regular maintenance.
✅ Industrial Strength Drain Cleaner – Made with high-performance cleaning agents, our 5L solution offers industrial-level power. Cuts through grease, food waste, fat, and organic build-up in residential or commercial settings.
✅ Simple to Use – No Tools Needed – No Tools or Plumbers Needed Just pour 1L of our powerful unblocker liquid directly into the affected area. Leave for 5–30 minutes (or overnight for tough blockages), then flush with hot water.
✅ Large 5 Litre Value Pack – Supplied in a generous 5L container, Inovix provides long-lasting use and great value. Ideal for households, landlords, cleaners, and facilities management teams.

MultiWare 5 Litre Heavy Duty Sink & Drain Unblocker | Strong Cleaning | Liquid Plug Hole Toilet Cleaner Tool For Home, Office, Garage & Shops (1 x 5 Litre)

Why We Love It

Powerfully clears stubborn clogs.
Safe for all pipes.
Offers rapid, efficient results.

Main Highlights

MULTIWARE POWERFUL DRAIN UNBLOCKER - Experience the strength of MultiWare's industrial-grade formula, specifically engineered to dissolve stubborn clogs quickly and efficiently. This powerful cleaner tackles everything from hair and soap scum to grease and food particles, ensuring your drains are free-flowing and clean.
SAFE FOR ALL PIPES - MultiWare Sink and Drain Unblocker is thoughtfully formulated to be safe for use in all plumbing systems. Whether your home uses modern PVC, traditional copper, or older metal piping, you can trust our product to clear clogs without causing any damage or corrosion.
RAPID RESULTS - Get quick results when time is of the essence. Our unblocker works within minutes to remove obstructions and restore optimal flow to slow drains, saving you both time and frustration. Simply follow the easy instructions for immediate relief.
EASY TO USE - Avoid expensive plumber calls with MultiWare's easy-to-use drain solution. Our clear, step-by-step guide allows anyone to professionally handle drain maintenance. Just pour the recommended amount into the drain, wait for the formula to work its magic, and rinse away the residues.
VERSATILE APPLICATIONS - Not just for kitchen sinks, MultiWare's Drain Unblocker is also effective in bathrooms, on shower drains, and even outdoor drains exposed to leaves and debris. Its versatility makes it a must-have in any home or commercial setting to tackle a variety of blockage issues.

1L Drain Unblocker Liquid - Fast Acting Heavy Duty Drain Gel - Better Than Bleach- Perfect for Bathroom Drains

Why We Love It

Restores proper drainage quickly.
Tackles tough clogs easily.
Suitable for various pipes.

Main Highlights

Powerful 1L formula effectively clears stubborn clogs. Fast-acting gel dissolves hair, soap scum, and grease buildup. Restores drains to optimal flow, preventing future blockages.
Superior to bleach, providing a safer and more efficient solution. Perfect for use in bathroom sinks, showers, and tubs. Saves you time and hassle compared to traditional methods.
Easy-to-use pour spout for convenient application. No need for messy plungers or harsh chemicals. Ideal for both residential and commercial use.
Leaves a fresh scent after each use, ensuring a pleasant bathroom environment. Eliminates odors caused by trapped debris in drains. Provides long-lasting results for ongoing drain maintenance.

5 Litre Heavy Duty Sink & Drain Unblocker Strong Cleaning Liquid Plug Hole Toilet Cleaner Tool For Home, Office, Garage & Shops (1 x 5 Litre)

Why We Love It

Unclogs sinks rapidly under 5 minutes.
Super-strength formula clears stubborn blockages.
Safely maintains all types of drains.

Main Highlights

SINK & DRAIN UNBLOCKER: However much you try, sometimes food, hair or other blockages might fall down your sink or drains. Luckily, our sink and drain unblocker will help you get those clogs shifted. Soon you’ll be able to take a shower without it filling up with water or wash up in your kitchen sink without the dirty water getting stuck. Our Sink and Drain unblocker is the fast and effective way to unclog your sinks and drains with one dose. Gets to work really fast in under 5 minutes.
POWERFUL FORMULA: Power through blockages in your drain with our super-strength drain unblocker solution. It's a home essential and can be used on sinks, showers, and outdoor drains. It powers through to the source of the blockage to resolve the issue and give you free running water again. Use regularly to ensure pipes and drains remain problem free.
MULTI USE: Protect your sinks and drains by using this drain unblocker on a regular basis. Out solution is safe for use on all pipes, its perfect for the home, office, workplace, shops and canteens.
SIMPLE TO USE: Add 1 Litre of product to the affected sink or drain and allow the solution to work for at least 5 minutes. For best results, leave for up to 30 minutes and then flush through with hot water. Simple select the amount required from the menu above.

Strong Heavy Duty Industrial Sink & Drain Unblocker Cuts Through Standing Water Fast Effect 5 Litre Cleaner (1 x 5 Litre)

8% Off

Why We Love It

Unclogs water in minutes.
Effective on various drains.
Safe for all pipes.

Main Highlights

5 Litre heavy duty industrial sink and drain unblocker is designed to cut through standing water that has been caused due to food being trapped in drain pipes or either a build up of hair stuck in showers. It effectively unclogs your sinks in just one dose and gets to work in less than 5 minutes so you can have running water again.
The powerful formula cuts through standing water, clogged toilets and sinks, this is a essential cleaning product used in most homes, offices, workplaces, canteens and shops.
Sink and drain unblocker can be used for sinks, showers, toilets, drains, outdoor drains it powers through to the source of the blockage to resolve the issue and give you free running water again.
We recommend you use this on a regular basis to ensure pipes and drains remain problem free, our solution is safe for use on all pipes and is very easy to use simply add 1 Litre of product to the affected sink or drain and allow the solution to work for at least 5 minutes. For best results, leave for up to 30 minutes and then flush through with hot water.

Mr Muscle Drain Unblocker, Sink & Drain Cleaner, Fast Acting Heavy Duty Gel Formula, Dissolves Clogs, Works 3x Better Than Bleach, Safe for All Pipes, Duo Pack, (2 x 1L)

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Why We Love It

Powerfully tackles tough clogs.
Quick-action, efficient unblocking.
Safe for all pipes.

Main Highlights

Sink power unblocker to destroy the toughest clogs in your drain
Blocked drain cleaner for dissolving clogs caused by debris in sinks, plugholes and pipes
3x more effective than bleach as a pipe unblocker based on hair removal in laboratory testing
Cuts through standing water to unblock plugholes
Mr Muscle drain unblocker is safe for use on all types of pipe

2PCS Powerful Sink and Drain Cleaner, Powerful Foaming Sink and Drain Cleaner - Fast-Acting Pipe Clog Remover, Heavy-Duty Pipe Dredging Agent & Unblocker for Bathroom, Kitchen, Shower

Free Shipping

Why We Love It

Powerful clog removal solution.
Deep cleaning foam reaches corners.
Eliminates odors effectively and efficiently.

Main Highlights

Powerful Sink and Drain Cleaner: Effectively removes hard water deposits, hair, and organic debris, effortlessly unclogs sinks, showers, and toilets. Dissolves hair, grease, and hard water deposits for rapid water flow. Ideal for heavy-duty pipe cleaning
All-Round Deep Cleaning: Foam-based formula reaches tough corners, ensuring thorough cleaning. Perfect for kitchen sinks, bathroom drains, and outdoor pipes
Eliminates Odors at the Source: Breaks down organic matter, hair, and debris to remove foul smells. Enjoy a long-lasting fresh after every use
Versatile Multi-Use Cleaner: Works in sinks, showers, toilets, and outdoor drains. A must-have for tackling clogs anywhere in your home
Easy & Long-Lasting: Simple to use with no complicated steps. Provides lasting results, keeping pipes clear and smooth for weeks

Vamoosh Plughole Unblocker, Drain Unblocker Bathroom - Dissolves Hair, Bleach-Free Bathroom Sink Unclogger, Septic Tank Safe, Fast Acting, Safe & Powerful - 2 Doses (600ml)

Free Shipping

Why We Love It

Dissolves hair without chemicals.
Septic tank safe formula.
Eco-friendly and recyclable packaging.

Main Highlights

DISSOLVES HAIR WITHOUT NASTY CHEMICALS - Blast stubborn blockages caused by hair and soap scum with this drain unclogger! Using hair-dissolving technology, it breaks down keratin in human and pet hair, leaving your drains free-flowing and odour-free.
SEPTIC TANK SAFE FORMULA - Ideal for homes with septic systems, this fast-acting bathroom drain unblocker is safe and powerful. It's safer for the environment, letting you unblock clogs worry-free.
FAST-ACTING & EASY TO USE - Simply pour half the bottle (300ml) of bathroom drain unblocker down the plughole, leave it to work for at least 30 minutes (or overnight for tougher clogs), and then flush thoroughly with hot water (2 doses per bottle)
100% RECYCLABLE & BIODEGRADABLE - The hair-dissolving experts at Vamoosh not only care for your home but also for the planet. The bottle is 100% recyclable and liquid is biodegradable, so you’re making an environmentally responsible choice.
100% CHLORINE BLEACH FREE - Formulated to be safe and effective, this non-corrosive drain unblocker won't damage your pipes, leaving your sinks & plugholes clear and free flowing.

Powerful Drain Cleaner & Unblocker l 1KG Caustic Soda | Fast-Acting, Heavy-Duty Sink & Drain Cleaner | Strong & Effective | The Original & Best l (Packaging Varies) (1KG, 1, count)

25% Off

Why We Love It

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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
Product type: DRAIN OPENER SUBSTANCE
Power unblocker to destroy the toughest clogs in your drain
3x stronger than bleach in removing hair-based clogs
Penetrates standing water to clear blocked drains quickly
Safe for all types of plumbing systems
Industrial Strength Formula, Fast Action
Brand : The Retail Heaven

8.7

Excellent

Save 25%

We scanned 1565 products

We reviewed these offers relevant to the Drain Unblocker Sink Drain Cleaner Fast Acting Heavy Duty Drain within online retailers such as Amazon, eBay and other local retailers, ensuring we covered all major brands and models. The products we selected come from trusted brands like Spear & Jackson, Inovix, MultiWare, SuperGift.com, STORM TRADING GROUP, Pluto Packaging, Mr Muscle, SONGMART, Vamoosh, The Retail Heaven, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best Drain Unblocker Sink Drain Cleaner Fast Acting Heavy Duty Drain in the market, we considered we took a deep dive into 7826 online reviews , focusing on elements like user satisfaction, performance in real-world conditions, and long-term reliability. Our ranking also evaluates each review’s relevancy, authenticity, up-to-dateness and depth so that the comparison is more sound.

We concluded that:

The clear winner of our analysis is Spear Jackson Heavy Duty Sink and Drain Unblocker Gel - Powerful Formula- Indoor and Outdoor, 5 l (Pack of 1). We love many things about this product by Spear & Jackson. What sets it apart from the competition is Effective on tough blockages, Safe for all pipes, Experienced, reputable brand.
The best value product for most shoppers and where user satisfaction is continuously the highest is Inovix® 5 Litre Heavy Duty Drain Unblocker | Sink Unblocker | Fast-Acting Solution for Sinks, Toilets, Showers Removes Hair & Sludge | Industrial Drain Unblocker Ideal For Indoor And Outdoor Drains by Inovix based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Drain Unblocker Sink Drain Cleaner Fast Acting Heavy Duty Drain and the best cost-to-value ratio is Powerful Drain Cleaner & Unblocker l 1KG Caustic Soda | Fast-Acting, Heavy-Duty Sink & Drain Cleaner | Strong & Effective | The Original & Best l (Packaging Varies) (1KG, 1, count)at The Retail Heaven with a 25% discount.
Our list of the best Drain Unblocker Sink Drain Cleaner Fast Acting Heavy Duty Drain is updated regularly to reflect new releases and changes in product availability, so be sure to check back often for the latest rankings and discounts.

10 Best Drain Unblocker Sink Drain Cleaner Fast Acting Heavy Duty Drain in The UK

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We scanned 1565 products

We concluded that: