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Paving & Exterior Cleaning

Algae Remover

Clear green growth and grime from render and hard surfaces. This ready-to-use biocidal cleaner kills algae, moss and lichens and helps surfaces stay cleaner for longer.

  • Kills algae, moss and lichens; breaks down mould and mildew
  • Safe on uPVC, plastics and polycarbonate
  • Spray on, leave to work, then rinse or pressure-wash

Select size

Unit price
£19.79£16.49 Incl. VATExcl. VAT
Line total
£19.79£16.49 Incl. VATExcl. VAT

UK mainland delivery for this order: £19.00 inc. VAT£15.83 ex. VAT Next-day delivery on orders before 12pm Highlands, islands and Northern Ireland priced at checkout

Action Kills algae, moss & lichens
Safety Plastic, PC & uPVC safe
Ready Ready to use

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+44 (0) 1302 623193

Mon–Fri 9am–5pm

Overview

Algae Remover (Soft Wash Algae Remover) is a ready-to-use façade and render cleaner. It combines a powerful biocide with paramagnetic cleaning technology to cut through dirt, grime and traffic film, kill algae, green moss and wall lichens, and help the surface repel future soiling.

It is made for soft wash algae removal: spray it on, give it time to work, then rinse. A pressure washer is optional, though it speeds things up on large or heavily soiled areas. That makes it a practical algae remover for render, including K-rend, and a moss and lichen remover for brick, stone, decking, tarmac and hard landscaping. It is designed for FM teams, building managers and building cleaning professionals.

Why choose it

  • Kills green growth: algae, green moss and wall lichens. It also breaks down mould and mildew.
  • Cleans as well as kills: cuts through dirt, grime, traffic film and gutter stains.
  • Helps surfaces stay cleaner for longer: paramagnetic technology helps repel future dirt.
  • Safe on fittings: plastics, polycarbonate and uPVC, plus fabric awnings and canopies.
  • Ready to use: no mixing or measuring on site.
  • Flexible: works on vertical and horizontal surfaces and is pressure-washer compatible.
  • Easy and economical for routine building maintenance.

Where to use it

  • Rendered façades, including K-rend and other renders
  • Cladding, canopies and fabric awnings
  • Brick, stone, concrete and masonry
  • Decking, tarmac, walkways and hard landscaping
  • uPVC, plastics and polycarbonate

It suits maintenance on public buildings, campuses and estates. It is a cleaner, not a sealer or protective coating. Finishes vary, so test coloured render and painted surfaces in a discreet spot before you start.

How to use it

  1. Patch-test a small, discreet area first.
  2. Protect planting. Pre-wet nearby vegetation and take steps to stop run-off reaching watercourses.
  3. Apply as supplied. Spray onto the affected area. It is ready to use, so there is no need to dilute it.
  4. Allow contact time so the biocide can act. How long depends on the conditions and how heavy the growth is. Don’t let it dry out; reapply or leave it longer on stubborn growth.
  5. Agitate stubborn areas with a cloth or brush.
  6. Rinse or pressure-wash to remove the loosened contamination, then rinse nearby planting.

How much do I need?

There is no fixed coverage rate. It depends on the surface, how porous it is and how much growth there is. For a large façade or a planned maintenance programme, contact our team and we’ll help you estimate quantities.

Good to know

  • Use biocides safely. Always read the label and product information before use.
  • PPE: wear suitable gloves and eye/face protection, and follow the data sheet for handling.
  • Run-off: prevent run-off into watercourses and protect planting where practical.
  • Horizontal surfaces: avoid pooling, and don’t let the product dry on the surface during the contact time.
  • Before painting or sealing: rinse thoroughly and let the surface dry fully first.
  • Storage: keep sealed and upright in a cool, dry place away from direct sunlight, and don’t let it freeze. Storage life is at least 12 months in sealed containers.

Cleaning paths or paving before sealing them? Once the surface is rinsed and fully dry, protect it with our Block Paving Sealer, or browse more cleaning products.

Compare all our paving and exterior cleaning products.

Additional information

Weight 5 kg
  • Type: Façade/Render Cleaner (biocide + paramagnetic action)

  • Removes: Algae, moss, lichens; breaks down mould & mildew; gutter stains/grime

  • Safe on: Plastic, polycarbonate, uPVC

  • Surfaces: K-rend, cladding, decking, tarmac, brick, stone

  • Workflow: Apply/Spray → Contact time → Rinse/Pressure-wash

  • Extras: Pressure-washer compatible; suitable for horizontal surfaces

  • Format: Ready to use; Size: 5 L (clear)

Frequently asked questions

What does Algae Remover clean?

Algae, green staining, wall lichens, and it helps break down mould/mildew and general grime on exterior surfaces.

Which surfaces is it suitable for?

K-rend and other renders, cladding, decking, tarmac/asphalt, brick, stone, concrete/masonry, and many plastics including uPVC and polycarbonate. Always test a small area first.

Is it safe on plastics and polycarbonate?

Yes—formulated to be safe on plastics, uPVC and polycarbonate. Patch-test before full use.

How do I use it?

Apply/spray onto the surface, allow contact time so the biocide can act, agitate if needed, then rinse or pressure-wash to remove loosened contamination.

Do I need a pressure washer?

Not required, but pressure-washing speeds removal on large or heavily soiled areas.

What is “paramagnetic” cleaning?

It refers to chemistry that helps lift and release contaminants, aiding the clean and helping the surface resist re-soiling.

Can I use it on horizontal surfaces (decks, paths)?

Yes—it’s suitable for horizontal and vertical surfaces. Avoid pooling and don’t let it dry out during contact time.

Will it damage coloured render or paint?

It’s designed for render/façades, but finishes vary. Always test a discreet patch and follow dwell-time guidance.

Is it ready to use, or do I dilute it?

Ready to use. Do not dilute unless your site method statement specifies otherwise.

How long should I leave it on before rinsing?

Give it a sensible contact time (conditions/soiling dependent). Reapply or extend dwell on stubborn growth—do not allow to dry out.

What PPE do I need?

Gloves and eye protection are recommended. Follow the product Data/Safety Sheet for handling and ventilation guidance.

Any environmental precautions?

Prevent run-off into watercourses and protect planting where practical. Pre-wet vegetation and rinse after cleaning.

How should I store it?

Keep sealed, upright and in a cool, dry place away from direct sunlight. Do not freeze.

Can I use it before painting or sealing?

Yes—after thorough rinse and full dry. Ensure the surface is clean and sound before applying coatings or sealers.

Can I use it on fabric awnings and canopies?

Yes. The data sheet lists it as safe on fabric awnings and canopies, as well as plastics, polycarbonate and uPVC. Fabrics and finishes vary, so test a small, discreet area first.

How long does it keep?

It has a storage life of at least 12 months when kept in a cool, dry place in its sealed container.

Who we support

Trusted across public, professional and creative sectors

Urban Hygiene products protect public spaces, transport networks, managed estates and creative projects across the UK.

Our customer base

  • Local authorities
  • Transport
  • Housing associations
  • FM companies
  • Artists
  • Contractors
  • General public