Can it be effective for red & black algae on cream-rendered exterior walls, without damaging the render finish?

Green Clear PRO can be used to kill and remove red and black algae on cream coloured render. A soft brush can be used to remove organic growth on badly contaminated areas.

How would your product be applied to a house roof?

Green Clear PRO is usually applied by a sprayer. In the case of house roofs, depending on access, it can be sprayed from a ladder or scaffolding. If the roof is not that high, then it can be applied using a sprayer and an extendable lance.

Does it also clear weeds, please?

Green Clear may kill some types of weeds, but is not regarded as a weed killer. It would be best to purchase a specific weed killer for that purpose.

Is this product animal/bird friendly?

We would not classify the Green Clear Pro as animal or bird-friendly immediately after application. Once dry, it is totally safe for birds and other animals to walk on.

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Green Clear Pro - 5L - Concentrated Biocide & Green Growth Remover. Spray-and-Leave Roof Tile Cleaner, Patio Cleaner & Algae Remover. For Use on Concrete, Wood, Decking & Stone

Product ID: 56093139

Details

Active ingredients
green algae
Brand
SmartSeal
Item form
Liquid
Liquid volume
5 Litres
Unit count
5000

🌿Kills & inhibits regrowth

🧴5L concentrated power

🛠️Multi-surface versatility

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€ 96.93

Duties & taxes included

In stock

Sold byAmazon FranceDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to France.

Secure transaction

Details

Active ingredients
green algae
Brand
SmartSeal
Item form
Liquid

Description

🌿 Effortless outdoor revival—spray, leave, and impress!

GENEROUS COVERAGE - 5L treats up to 240m², delivering professional results with every application.
LONG LASTING PROTECTION - Prevents regrowth, keeping your patios, roofs, and driveways moss-free for months.
TRADE GRADE BIOCIDE POWER - HSE-approved formula obliterates algae, lichen, and mold for a pristine finish.
SPRAY WALK AWAY CONVENIENCE - No pressure washing needed—just apply and let it work its magic over weeks.
VERSATILE SURFACE COMPATIBILITY - Perfect for concrete, wood, decking, stone, UPVC, and more—one solution for all outdoor surfaces.

SmartSeal Green Clear Pro is a professional-grade, HSE-approved biocide designed to eliminate and prevent green algae, lichen, mold, and mildew on a wide range of outdoor surfaces. Its concentrated 5L formula covers up to 240m² and requires no rinsing or pressure washing—just spray and leave. Ideal for patios, roofs, driveways, decking, and more, it offers a versatile, long-lasting solution trusted by both trade professionals and homeowners.

Specifications

ASIN	B01BTXIHII
Active Ingredients	green algae
Best Sellers Rank	6,113 in Garden ( See Top 100 in Garden ) 92 in Moss Control
Brand Name	SmartSeal
Country of Origin	United Kingdom
Coverage	200 square meters
Customer Reviews	4.2 4.2 out of 5 stars (79)
Included Components	Product only
Item Form	Liquid
Liquid Volume	5 Litres
Part Number	sm-mcp-5
Unit Count	5000 millilitre(s)

Reviews

J**K

Just the job.

Used it on my tarmac drive. 12 months ago. No sign of any moss returning. Good value.

10.07.2022

P**H

Love it

Easy to use and quick results and value for purchase

21.05.2022

J**N

Good service

Great

9.01.2026

A**N

Very effective

Good product - excellent customer support

4.08.2022

S**S

Not al that!

After two coats, black spots remained. Product too weak.

22.08.2025

M**L

excellent

Great stuff really helps when cleaning roof, superb

5.08.2020

J**W

Effective but Costly

Kills the moss quite quickly but requires a second application a few weeks later. I now use vinegar bought in 5L containers. Also needs 2 applications at a fraction of the price,

8.01.2021

M**G

Works

Have used it twice on small areas of moss covered paving and it seems to work. Moss was reasonably easy to scrape off after leaving for 4 Days.

23.05.2024

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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TrustScore 4.5 | 7,300+ reviews

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Great experience from order to delivery. Highly recommended!

1 week ago

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The delivery time was excellent, and the packaging was secure.

2 months ago

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€ 96.93

Duties & taxes included

In stock

Sold byAmazon FranceDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to France.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

5 days ago

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2 weeks ago

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