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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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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SmartSeal Green Clear Pro - 25L - Concentrated Biocide & Green Growth Remover. Spray-and-Leave Roof Tile Cleaner, Patio Cleaner & Algae Remover. For Use on Concrete, Wood, Decking & Stone

SmartSeal Green Clear Pro - 25L - Concentrated Biocide & Green Growth Remover. Spray-and-Leave Roof Tile Cleaner, Patio Cleaner & Algae Remover. For Use on Concrete, Wood, Decking & Stone

Product ID: 90561603

Details

Active ingredients
green algae
Brand
SmartSeal
Item form
Liquid
Item weight
25 Kilograms
Liquid volume
25 Litres

🌿kills & inhibits green growth

🚫no pressure washing needed

🧴25L concentrated power

Description

🌿 Effortless green growth control—spray, leave, and reclaim your outdoor space!

MASSIVE COVERAGE - One 25L container treats up to 240m², ideal for large outdoor spaces and commercial use.
SPRAY WALK AWAY - Effortless application—no scrubbing or rinsing required, saving you time and hassle.
LONG LASTING PROTECTION - Prevents regrowth with dilution options tailored for heavy or regular contamination.
VERSATILE SURFACE CLEANER - Perfect for concrete, wood, decking, stone, patios, roofs, and garden furniture.
PROFESSIONAL GRADE BIOCIDE - HSE-approved formula trusted by pros to eliminate algae, mould, lichen & mildew.

SmartSeal Green Clear Pro is a professional-grade, HSE-approved biocide designed to kill and prevent algae, mould, lichen, and mildew on a wide range of outdoor surfaces. This concentrated 25L formula offers versatile, spray-and-leave application with no need for pressure washing, covering up to 240m² per 5L. Ideal for patios, roofs, decking, and stone, it delivers long-lasting protection and effortless maintenance for pristine outdoor environments.

Specifications

ASIN	B01BTXIHIS
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	1000 square meters
Customer Reviews	4.4 4.4 out of 5 stars (9)
Included Components	Product only
Item Form	Liquid
Item Weight	25 Kilograms
Liquid Volume	25 Litres
Part Number	sm-mcp-25
Unit Count	25000.0 millilitre(s)

Reviews

R**T

Great item

Excellent customer service quickly delivered. Great product.

21.08.2025

S**N

Did not bring promised results

It didn’t work in my garden. Moss is as healthy as before

21.04.2021

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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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Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

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