HG Algae and Mould Remover 1 Litre

HG Algae and Mould Remover 1 Litre is a powerful outdoor algae and mould treatment designed to remove unwanted growth from patios, walls, roofs and concrete surfaces.

Over time, outdoor surfaces can develop green algae, mould and other organic deposits, particularly in damp, shaded or exposed areas. These deposits can leave patios, paths, walls and other exterior surfaces looking dirty and poorly maintained.

HG Algae and Mould Remover provides an effective treatment for these problem areas, helping restore the appearance of outdoor surfaces with visible results within approximately 36 hours.

The concentrated formula provides excellent coverage, with 1 litre sufficient to treat surfaces of up to approximately 200m² when used according to the recommended dilution and application instructions.

When correctly diluted and used as directed, HG states that the product has no harmful effect on grass and plants, making it particularly practical for patios, paths and other surfaces located close to garden areas.

For anyone searching for a patio algae remover, outdoor mould remover, concrete algae cleaner, roof algae treatment, exterior wall mould remover or green algae cleaner, HG Algae and Mould Remover provides a convenient solution for maintaining cleaner outdoor surfaces.

Key Benefits

• Powerful outdoor algae remover

• Helps remove mould from exterior surfaces

• Ideal for patios

• Suitable for outdoor walls

• Suitable for compatible roofs

• Ideal for concrete surfaces

• Tackles green outdoor growth

• Useful for damp and shaded areas

• Results within approximately 36 hours

• Helps restore dirty-looking outdoor surfaces

• Concentrated for economical use

• Suitable for large outdoor areas

• Covers up to approximately 200m²

• No harmful effect on grass and plants when correctly diluted and used as directed

• Ideal for seasonal outdoor cleaning

• Useful for garden and property maintenance

• Convenient 1 litre size

Suitable For

• Patios

• Outdoor walls

• Roofs where compatible

• Concrete surfaces

• Concrete paths

• Outdoor paved areas where compatible

• Garden surfaces

• Exterior areas affected by algae

• Surfaces affected by mould

• Damp and shaded outdoor areas

Helps Remove

• Algae

• Green surface growth

• Outdoor mould

• Organic surface contamination

• Algae build-up on concrete

• Growth on patios and walls

• Exterior mould and algae deposits

How to Use

• Remove loose dirt, leaves and debris from the surface where necessary.

• Check that the material is compatible with HG Algae and Mould Remover.

• Prepare the product according to the dilution instructions on the packaging.

• Apply the treatment evenly to the affected outdoor surface.

• Ensure areas of visible algae and mould receive adequate coverage.

• Allow the product to work according to HG's instructions.

• Results can be visible within approximately 36 hours.

• When treating areas close to lawns, borders or plants, follow the stated dilution and application instructions carefully.

• Avoid unnecessary application directly onto vegetation.

• Repeat treatment where permitted if particularly heavy contamination remains.

• For roof applications, use appropriate access and working-at-height precautions.

• Always follow HG's complete application and safety instructions.

Ideal for Patio Cleaning

Patios can quickly develop green algae and mould, particularly during damp weather or in areas receiving limited sunlight.

HG Algae and Mould Remover is designed to tackle this unwanted growth without requiring constant intensive cleaning. The treatment works over time, with results appearing within approximately 36 hours.

It is particularly useful for seasonal patio maintenance and preparing outdoor areas for spring and summer use.

Large Coverage – Up to 200m²

HG Algae and Mould Remover is highly economical for treating larger exterior areas.

Bottle Size: 1 Litre
Maximum Coverage: Up to approximately 200m²

Actual coverage may vary depending on the dilution, application method, surface porosity and severity of algae or mould growth.

Garden-Friendly When Correctly Diluted

When properly diluted and used according to HG's directions, the product is stated to have no harmful effect on grass and plants.

This makes it particularly useful for treating patios, concrete areas and walls situated close to lawns and planted areas. Care should still be taken during application, and the manufacturer's instructions should always be followed.

Product Information

Brand: HG
Product: Algae and Mould Remover
Size: 1 Litre
Type: Outdoor algae & mould treatment
Removes Algae: Yes
Targets Mould: Yes
Suitable for Patios: Yes
Suitable for Outdoor Walls: Yes
Suitable for Roofs: Yes, where compatible
Suitable for Concrete: Yes
Results: Within approximately 36 hours
Coverage: Up to approximately 200m²
Grass & Plant Compatibility: No harmful effect when correctly diluted and used as directed
Primary Use: Removing algae and mould from compatible outdoor surfaces

WEEE Recycling Producer Registration Number:12889

How do I return my old product to be recycled?

You can return your old product to MyDIY. Waste Electrical and Electronic Equipment (WEEE) is taken back free of charge on a one-for-one, like-for-like basis. Waste batteries including rechargeable batteries are taken back free of charge. You are not obliged to make any purchase when returning old batteries. Each local authority must also accept household WEEE and small batteries free of charge at its recycling facilities. All WEEE and waste batteries must be recycled and should not be placed in any of your household wheelie bins. Make sure you always recycle all your old electrical goods and batteries.

What products can I recycle for free?

You can return anything that is electricaly powered or battery powered. Even your old bicycle lamps can be recycled!.

Do you take back used batteries?

Yes we do. The batteries that we accept are AA, AAA, C or D, powertool batterys and also the flat batteries that are found in watches and toys. Unfortunately we do not accept back any Industrial or car batteries.

Do I need to have made a purchase at MyDIY.ie?

No you don't. You can recycle any of the above items at our store in Inchicore Dublin 8, even if you have not made a purchase with us.

Will you collect my old product?

Yes, but we must be notafied within 14 days of purchase date. You can still arrange to have your old appliance recycled free of charge. Simply bring it back to our Inchicore store and we will ensure that it is disposed of in an environmentally friendly manner.

How much will it cost?

There is no charge to return products to any of our warehouses.

Why should I recycle with MyDIY?

We will ensure that your old product is disposed of correctly to reduce the potentially harmful effects caused on the environment and to conserve natural resources. Further information can be found on weeeireland.ie.

EMC (Environmental Management Cost) Included in the purchase price. 

Gas discharge lamps, LFLs and CFLs €0.15

LED lamps and luminaires €0.05

Large appliances €5.00

Information

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We ship all orders via DPD, one of Ireland’s most trusted couriers. With DPD’s one-hour delivery window, you won’t have to wait around all day for your MyDIY.ie order!

Delivery Times

Each product on our website is marked with an estimated delivery time. If you order multiple items, your order will arrive based on the item with the longest delivery time. For example, if you buy two next-day items and one 3-day item, the entire order will arrive in 3 days.

While most products arrive in 1-2 days, we offer over 44,000 items, so please allow 4-5 working days for some deliveries. Need it faster? Call us at 01-446692, and we'll do our best to help.

Delivery Charges

• FREE delivery for orders over €150 within Ireland.

• Orders under €150: €8.99 delivery fee.

• International delivery: Charges based on weight—contact us for a quote.

When Will I Receive My Order?

• Most orders ship on a 24-hour courier service (2 working days).

• Larger orders may take 4-5 days, and pallet deliveries require scheduling.

• Orders placed before 2 PM usually ship within 24 hours.

• Orders after 1:30 PM Friday or on weekends ship the following week.

• Busy holiday periods may cause slight delays beyond our control.

Do I Need to Be Home for Delivery?

Yes, someone must sign for deliveries due to item value. If you're not home, DPD will leave a card with re-delivery or collection instructions. After two failed attempts, your order may be returned to us, and a re-delivery fee may apply.

Damaged or Incomplete Orders

We carefully pack all orders, but if something arrives damaged or incomplete, contact us within 24 hours. Report shortages within 3 days of delivery.

International Shipping

We ship to Europe and worldwide, with charges based on weight. Liquid products cannot be shipped internationally due to regulations. Contact us for a quote—we're happy to help!

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