Best Ago Quart 400 2025

Advertising Disclosure

Last Updated - 26.07.2025

Best Choice

01

ABACUS

ABACUS® Nell Ultra Green Growth Remover & Algae Remover Concentrate, Extremely Strong! Removes Green Growth & Algae Automatically with Long-Term Protection - for Stone, Facade, Patio, Roof - Nell

Show more
9.7

Exceptional

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Show more
Main highlights

AUTOMATIC CLEANING: The Nell Ultra green growth remover & algae remover removes the green coating by itself and is extremely effective - you can sit back and relax while it does the work. The automatic action of the green growth remover frees patios, walkways and other surfaces from unsightly green deposits without tedious scrubbing and cleaning.
Very high yield: the Nell Ultra green growth remover has one of the highest active ingredient content on the market with 40% active ingredient. This makes our green growth remover not only extremely effective, but also very economical - with one litre of our algae remover, up to 100 m² of area of algae and green growth can be freed. This exceptionally high efficiency protects the environment and your wallet without compromising on quality.
Versatile effective: our green growth and algae remover is a real all-rounder and can be used on all waterproof surfaces. It is the perfect helper for outdoor use and is ideal for removing green growth on patios, pavements, stones, facades, plaster, walls, gravestones, roofs, fences, awnings, WPC and much more.
Proven premium quality: our green growth remover has been removing algae and green growth throughout Germany for over 30 years and has proven itself - more than 2 million bottles sold speak for themselves. The combination of carefully selected ingredients and an exceptionally high active ingredient content ensure the effective and automatic removal of algae, green growth, lichens and fungi that Nell Ultra is known for.
Officially registered: Nell Ultra green growth and algae remover is a biocide: use biocidal products carefully. Always read the label and product information before use. / Reg number: N-116781
Long-term protection with deep effect: our green growth remover offers the self-acting effect as well as the proven long-term protection. The special formula penetrates into the capillaries and removes even the smallest residues of algae, lichens and fungi. This means that surfaces treated with Nell Ultra remain protected from new infestations for up to 12 months - not only looks beautiful, but also saves time and money.
In harmony with the environment: the Nell Ultra green growth remover and algae remover meets even the highest quality standards thanks to its sustainability. Since the environment is important to us, we have developed a green growth remover that is chlorine-free, acid-free and contains no animal ingredients. The selected ingredients can also be completely biodegradable and are safe for humans and animals.

84,90 €
Value for Money

02

Nanoprotect

Nanoprotect Stone impregnation with pressure sprayer, professional quality, preventive against green growth and dirt, 10 litres for approximately 80-120 m²

Show more
9.6

Exceptional

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Show more
Main highlights

Water-based, no solvents. For indoor and outdoor use. Quality - Made in Germany.
Preventive hydrophobing against green growth, moss infestation, dirt and frost damage.
Invisible waterproofing for absorbent mineral surfaces. Water and dirt-repellent.
Ideal for patios, balconies, pathways, facades, roof tiles, carports, concrete, paving stones and sandstone.
Contents: 10 litres covers approximately 80-120 m² + pressure sprayer for easy application. Also available as a 5 litre canister, 10 litre canister (without pressure sprayer) or as 1 kg concentrate.

78,90 €
03

Ago

AGO® Quart Green Plaque Remover for Façade Wood, Plastic Roof Tiles, Stone, Plaster, Awning, Concrete, and Much More, Chlorine and Acid-Free, Lichen and Algae Remover Concentrate

Show more
9.4

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Show more
Main highlights

Safety - Lichen Remover & Natural Stone Cleaner: Use biocidal products with care. Read the label and product information before using the patio and façade cleaner. BAuA N-72912.
Practical algae and lichen remover: Our algae remover concentrate is biologically based, completely gentle on the surface and can be used on all waterproof surfaces.
Long-lasting effect: The highly effective surface cleaner contains an active ingredient that, once applied for 15-18 months, is slightly disinfectant and kills micro-organisms.
Effective green remover: entirely without the need for high-pressure cleaners - no more scrubbing and rinsing. Green algae disappears after a few days, black algae gradually over the course of one year.
Economical Green Plaque Remover for Wood etc.: 1 x litre of Ago Quart algae and green plaque remover makes 20 x litres of ready-to-use solution.

59,90 €
04

ABACUS

ABACUS® Nell Ultra Green Growth Remover & Algae Remover Concentrate, Extremely Strong! Removes Green Growth & Algae Automatically with Long-Term Protection - for Stone, Facade, Patio, Roof - Nell

Show more
9.2

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Show more
Main highlights

AUTOMATIC CLEANING: The Nell Ultra green growth remover & algae remover removes the green coating by itself and is extremely effective - you can sit back and relax while it does the work. The automatic action of the green growth remover frees patios, walkways and other surfaces from unsightly green deposits without tedious scrubbing and cleaning.
Very high yield: the Nell Ultra green growth remover has one of the highest active ingredient content on the market with 40% active ingredient. This makes our green growth remover not only extremely effective, but also very economical - with one litre of our algae remover, up to 100 m² of area of algae and green growth can be freed. This exceptionally high efficiency protects the environment and your wallet without compromising on quality.
Versatile effective: our green growth and algae remover is a real all-rounder and can be used on all waterproof surfaces. It is the perfect helper for outdoor use and is ideal for removing green growth on patios, pavements, stones, facades, plaster, walls, gravestones, roofs, fences, awnings, WPC and much more.
Proven premium quality: our green growth remover has been removing algae and green growth throughout Germany for over 30 years and has proven itself - more than 2 million bottles sold speak for themselves. The combination of carefully selected ingredients and an exceptionally high active ingredient content ensure the effective and automatic removal of algae, green growth, lichens and fungi that Nell Ultra is known for.
Officially registered: Nell Ultra green growth and algae remover is a biocide: use biocidal products carefully. Always read the label and product information before use. / Reg number: N-116781
Long-term protection with deep effect: our green growth remover offers the self-acting effect as well as the proven long-term protection. The special formula penetrates into the capillaries and removes even the smallest residues of algae, lichens and fungi. This means that surfaces treated with Nell Ultra remain protected from new infestations for up to 12 months - not only looks beautiful, but also saves time and money.
In harmony with the environment: the Nell Ultra green growth remover and algae remover meets even the highest quality standards thanks to its sustainability. Since the environment is important to us, we have developed a green growth remover that is chlorine-free, acid-free and contains no animal ingredients. The selected ingredients can also be completely biodegradable and are safe for humans and animals.

54,90 €
05

ABACUS

ABACUS® Nell Ultra Green Growth & Algae Remover Concentrate, Extremely Strong Automatically Removes Green Growth and Algae with Long-Term Protection - for Stone, Facade, Patio, Roof - Nell Ultra, 4 x

Show more
9.1

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Show more
Main highlights

Very high yield: At 40%, the Nell Ultra Green Growth Remover has one of the highest active ingredients on the market. This makes our green growth remover not only extremely effective, but also very economical - with one litre of our algae remover, up to 100 m² of area of algae and green growth can be freed. This exceptionally high efficiency protects the environment and your wallet without compromising on quality.
Proven premium quality: Our green growth remover has been removing algae and green growth throughout Germany for over 30 years and has proven itself - more than 2 million bottles sold speak for themselves. The combination of carefully selected ingredients and an exceptionally high active ingredient content ensure the effective and automatic removal of algae, green growth, lichens and fungi that Nell Ultra is known for.
Officially registered: Nell Ultra Green Growth & Algae Remover is a biocide: Use biocidal products with care. Always read the label and product information before use (English language not guaranteed). Reg. no: N-96059.
Long-term protection with deep effect: In addition to the automatic effect, our green growth remover also offers proven long-term protection. The special formula penetrates into the capillaries and removes even the smallest residues of algae, lichens and fungi. This means that surfaces treated with Nell Ultra are protected from new infestations for up to 12 months - not only looks beautiful, also saves time and money.
In harmony with the environment: The Nell Ultra green growth remover and algae remover meets even the highest quality standards thanks to its sustainability. Since the environment is important to us, we have developed a green growth remover that is chlorine-free, acid-free and contains no animal ingredients. The selected ingredients can also be completely biodegradable and are safe for humans and animals.
Automatic cleaning: The Nell Ultra Green Growth Remover & Algae Remover removes the green plaque on its own and is extremely effective - you can sit back and relax while it does the job. The automatic action of the green growth remover frees patios, walkways and other surfaces from unsightly green deposits without tedious scrubbing and cleaning.
All-round effective: Our green growth and algae remover is a real all-rounder and can be used on all waterproof surfaces. It is the perfect helper for outdoor use and is ideal for removing green growth on patios, pavements, stones, facades, plaster, walls, gravestones, roofs, fences, awnings, WPC and much more.

69,90 €
06

Ago

AGO® Mould Remover, Anti Mould Medium Mould Remover Mould Cleaner for Bathroom Wallpaper Silicone Joints, Works Much Stronger Than Conventional Spray Cleaner

Show more
9.0

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Show more
Main highlights

Versatile: The anti-mould set can be used indoors and outdoors. In the bathroom, house, sauna, on tiles, joints, silicone, ceilings, wallpaper, walls and masonry.
Safety: Use biocidal products with care. Read the label and product information before use. BAuA N-72983.
Recommendation: For an extended long-term effect, it is recommended to use AGO mould stop, it prevents approximately 15-18 months of mould growth.
Immediate effect. The mould remover with chlorine destroys mould, algae, fungal agents, mould stains and bacteria. It is bleaching, disinfectant and leaves no toxic substances.
ASSORTMENT: Discover the different bundles of our products, so you are guaranteed to find the right set for your needs.

22,90 €
07

A.K.B.

A.K.B. Steinreich Concentrate, 5 Litres with Spout, Cleaner for Clean Paths and Places up to 2000 m² (5000)

Show more
8.9

Very Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Show more
Main highlights

Your home remains permanently beautiful with regular use. Apply a light solution to the clean surface as needed. Use biocidal products carefully. Always read the label and product information before use.
Unique formula for thorough removal of even the smallest micro-organisms and bacteria on many mineral surfaces. High-quality composition of carefully selected raw materials and high active ingredient content. Solvent-free, acid-free
Suitable for many types of stone: such as concrete slabs, paving stones, paving, clinker, masonry, concrete, patios, stone surfaces, tiles, pebbles, stone slabs and much more
Removes your stone surfaces effectively and easily from light green growth after a single application with instant effect. High yield. Depending on the type of infestation, use pure up to 1:10. The range is up to 2000 m² for green growth.
Reliably removes dirt: destroys black algae, removes green growth, fights lichen/fungi. Specially developed for intensive deep cleaning of organic residues. Delays reinfestation. Prevents new dirt
Proven premium quality from Germany for over 10 years - developed by us for high demands. A.K.B.Steinreich is a registered biocidal product RegNr. N-114253. Biodegradable (5000)
Manual variant: For faster results: incorporate the undiluted cleaner with a scrubber, leave to work, rinse and you're done, repeat if necessary. Or use a pressure washer instead of rinsing after the exposure time.
Highly effective universal cleaner for outdoor use: versatile. For maintenance, can be used as algae remover, green growth remover, stone cleaner, facade cleaner, patio cleaner, tile cleaner and roof cleaner
Extremely strong outdoor cleaner: with power effect for a perfect home. Universal cleaning agent for home, garden and business. Intensive cleaner for paths and places. The surface shines like new. Versatile use
Automatic cleaning: easy to use. Apply using a pressure sprayer or watering can, leave to work, no rinsing/pressure washer necessary. Eliminates lichens, fungi by applying several times within weeks/months thanks to the long-term effect

49,25 €
08

ABACUS

ABACUS® Extreme Stone Cleaner, Intensive Stone Cleaner for Outdoor Use with Immediate Effect, Removes Immediately Dirt, Green Growth, Lichens and Algae on Stones in Minutes, Stone Cleaner Intensive

Show more
8.8

Very Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Show more
Main highlights

Note: stone cleaner extreme is a biocide: use biocidal products carefully. Always read the label and product information before use. / Reg number: N-104852
Extremely versatile: the extreme stone cleaner removes not only algae, fungi and lichens from stones in an instant. When cleaning patio and paving stones, the powerful formula ensures that even dirt, mould stains and even mould are easily removed. What's special about our intensive cleaner? Despite its extreme power, it is gentle on stone surfaces. Whether natural stone, paving stone or concrete, our intensive cleaner removes dirt without damaging it.
Extremely sustainable: the deep effect of the stone cleaner extreme removes even the smallest micro-organisms and bacteria from the stone surface. As even the smallest remains of lichens and algae are removed during stone cleaning, paving stones and terraces are thus protected from re-infestation.
Extremely powerful: the unique formula of the stone cleaner extreme is extremely powerful and has been specially developed to remove even the most stubborn dirt such as green growth, algae, fungi and lichens from stones in no time at all without the need for a pressure washer. The outdoor stone cleaner is so intense that patios and paving stones are brightened again.
Extremely fast: our stone cleaner extreme has been specially developed for quick and immediate green growth removal. It destroys algae, fungi, lichens and dirt in no time. Ideal when visits are coming and paving stones or patios need to be spontaneously cleared of green growth. The dirt is completely removed and the surface shines like new.
Extremely easy to use: our stone cleaner extremely easy to use. Nothing more needs to be done than apply the stone cleaner undiluted to the dirty terrace or stone surface and massage it with a scrubber or brush - leave to work for a short time, rinse and you're done!

39,90 €
09

PROCREA

PROCREA® Premium Green Growth Remover "Grünbelag Ex" [For up to 400 m²] Highly Effective Professional Concentrate for Verdigris, Stone, Wood, Moss, Lichens, Fabric and Much More – 20 times Reinforced

Show more
8.7

Very Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Show more
Main highlights

Self-acting – no scrubbing required. Ideal for a wide range of outdoor applications such as patios, roofs, facades, awnings and much more.
Professional – the surface must be dry and remain rain-free for 24 hours. Rain delays the effect. In case of severe infestation, reapply after a few days.
Guaranteed quality – no ifs and buts. Our promise: If something is wrong with our product, you will receive your money back within a short time - order now!
Extra gentle – the green growth remover has a biological basis, is safe for humans and animals and is therefore still gentle on the surface. No risk of slipping after application
Effective cleaning – remove verdigris without pressure washer and scrubbing – with this green growth remover concentrate, green algae disappear after a few days, black algae within a year.

12,90 €
10

Ago

AGO® Gravestone Cleaner 500 ml in Hand Sprayer / Cleans Automatically and without Scrubbing / 18 Months Long-Term Protection / Cleaner for Tombstones, Monuments and Natural Stones of All Types

Show more
8.6

Very Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Show more
Main highlights

Versatile – suitable for marble, granite, sandstone and all other natural stones. Ideal for cleaning grave slabs, stone figures, monuments, ornamental stones in the garden and other stone carving work.
Safe to use – use disinfectant cleaner safely. Always read the label and product information before use. Baua N-81354
Gentle on materials: unlike other corrosive products, our cleaner works effectively and does not damage fonts or metal letters on the gravestone or monument.
Environmentally friendly – when used as intended, plants nearby do not need to be covered, as the cleaner has no negative effects on the environment.
Easy to use – no scrubbing or pressure washer required. The surface cleans itself after application and protects against new dirt for up to 18 months.

18,95 €