I have a lot of moss and algae growing on a painted rendered cottage, is this a good product for use before repainting?

I only used it on patio and it was not very effective so gave up using it. I have painted rendered walls on house and my decorator applies a decorating exterior algae remover and leaves for 24 hours before hosing down, using stiff brush on stubborn stains. He then applies algae inhibitor before painting walls with exterior wall coating. I believe both these products are available from Amazon.

Does the product remove black mould from natural stone?

Did not work for me. I now use a pressure washer with a patio cleaning head and get perfect results which last for several years.

Is this definitely good on roofs and gutters?

I don’t see why not but I use it for the algae on my terrace and have not used it on roofs and gutters. It works very well for me.

can it be used on a balcony covered with a rubber membrane

Don't know Joyce. It's really good stuff, doesn't smell chemical but reckon it must have something potent I it that might damage rubber. Think I'd get on to the company if it were me best regs cathy

We remain fully operational. Our teams are working around the clock to ensure your deliveries continue safely.

DOWNLOAD THE APP

WE SOURCE ITEMS FROM

UAE
UK
India
USA
Japan

Customer Services

About Us

Customer Support

Our Other Brands:Hewyn|Selfship

We remain fully operational. Our teams are working around the clock to ensure your deliveries continue safely.

DOWNLOAD THE APP

WE SOURCE ITEMS FROM

UAE
UK
India
USA
Japan

Customer Services

About Us

Customer Support

Our Other Brands:Hewyn|Selfship

Sika Mould Buster 5Lt

Product ID: 51953372

Secure Transaction

Details

Active ingredients
Ferrous
Brand
Sika
Item form
Liquid
Item weight
5 kg
Liquid volume
5 Litres

⚡Fast-acting formula

🌿Biodegradable & eco-friendly

🧴5L concentrated coverage

Description

🌟 Transform your outdoor spaces effortlessly—because first impressions last!

ECO SMART FORMULA - Biodegradable and bleach-free, protecting your surfaces and the planet.
WIDE SURFACE MASTERY - Perfect for patios, driveways, fences, decking, and more—one solution for all exterior hard surfaces.
LONG LASTING PROTECTION - Stops early mould regrowth, keeping your outdoor spaces pristine for weeks.
EFFORTLESS POWER CLEANING - No scrubbing or pressure washing needed—just apply and watch the magic.
REGULATION APPROVED SAFETY - Certified under Control of Pesticides Regulation 1986 for trusted, responsible use.

Sika Mould Buster 5Lt is a powerful, biodegradable mould remover designed for exterior hard surfaces. It requires no scrubbing or pressure washing, covers up to 80 square meters, and effectively prevents early mould regrowth. Approved under UK pesticide regulations, it offers a safe, eco-friendly solution for patios, driveways, decking, and more.

Specifications

ASIN	B0026MT3KI
Active Ingredients	Ferrous Sulphate
Best Sellers Rank	47,524 in Grocery ( See Top 100 in Grocery ) 205 in Mould Removers
Brand Name	Sika
Coverage	80 square meters
Customer Reviews	4.5 4.5 out of 5 stars (615)
Included Components	5 Litres
Item Form	Liquid
Item Type Name	Removes Algae, Mould and Green Growth
Item Weight	5 kg
Liquid Volume	5 Litres
Manufacturer	Sika
Model Number	SKMBUST5-EBD
Part Number	18MOU05
Unit Count	5000.0 millilitre(s)

Reviews

A**R

Good for stopping mould

Always use this , great for keeping flags clean and even when they get a bit of mould on over the winter they come clean really easily.

18.02.2026

D**S

Brightens up paving

Fantastic stuff for brightening paving and lockblock. Works slowly over a couple of weeks, so don't be impatient

27.09.2025

G**S

Great for removing mould

This worked well in removing mould and fungi from the external walls of our house. It needed a couple of applications in some places, but a good product.

4.10.2025

R**Y

Brilliant stuff!

This stuff is brillint, specially on surfaces where jet washing isn't possible or you havn't got one. just pick a day when there is no rain forcast for 24 hours, spray or brush and leave. Mould will be gone within 24 to 48 hours.

22.03.2026

P**D

Moss gone

So far so good we will see if the moss comes back

5.03.2026

M**A

No quick result but wait it's worth it

I was given a small amount of Moldbuster by a friend who said it was amazing. I sprayed an area to see. Nothing happened for months then it started to work. The picture shows the area I treated. I am totally amazed how well it has worked so bought 5litres so I can do the rest. It has got rid of the black mold, bird poo, algae in fact everything. Spray it on be patient and it will work. My photo is proof.

28.04.2023

P**S

Easy to use

Seems to be good Easy to mix one part to 4 parts water. Lucky I have a sprayer to apply. Need to pick a dry day to apply. So far the algae seems to disappear after application

23.03.2024

G**B

Mould

This is the best stuff ever

14.12.2025

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

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.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

Vikram D.

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

2 weeks ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Anita G.

Good experience, but the tracking updates could be better.

2 months ago

Reema J.

Perfect platform for hard-to-find items. Delivery was prompt.

1 month ago

View all Trustpilot reviews