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Fast Acting Roof Cleaner to Clean Dirt, Algae & Grime from Roofs

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Fast Acting Roof Cleaner to Clean Dirt, Algae & Grime from Roofs
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Customer Reviews

The product worked well. The tiles I cleaned were covered in ground in dirt and algae which I haven't cleaned for a long time. I followed the instructions and they now look like new.

By Stephen Cayzer

Excellent product that does what it says. After scraping the roof clean I applied this cleaner and immediately I could see the tiles brightening up and returning to their natural colour. I will use this again. Well done Smartseal.

By Paul Hickmott From PH Exterior Cleaning Services

First time of ordering and using this product and I have to say I was amazed by its performance. After just one application by brush I could see each tile changing appearance as I progressed to reveal the true tile colour. After a short time, the tiles had turned from a dirty, dark grey colour into beige!! WOW! I left the tiles for 60 minutes as instructed, to be sure its work was complete, but I am sure I could have rinsed it off much sooner and got the same result. This is such a great product, easy to apply and the result was truly stunning without the need to scrub or pressure wash. Can recommend 100%.

By Brian Maw From Sheffield

First time I've used Smartseal products , excellent results.


Excellent roof cleaning product, excellent service. Good communication and fast delivery. Would buy again.


Very good cleaner for roofs especially. I found it needs 2 applications to get the roof back to it's original look. It also needs thorough use of a wire brush to remove moss and lichens. It contains large quantities of chlorine so protective clothing is a must. I used it on a roof I built in hand made tiles 8 years ago in a very dirty area that had been mistakenly treated with copper sulphate to kill the moss, which of course turned the tiles black. The Roof Clean Extreme 60 removed all of this restoring it to it's former glory. I will be using this product regularly for cleaning roofs in future as it makes such an amazing difference to the look of a property if the roof looks as new. Overall the product is expensive but well worth the cost, time and effort which incidentally takes a few days to clean it properly on a medium sized roof.

By Peter Page From Lewes

My roof now looks like the day it was laid can't Neil even the difference

By Colin Owens
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A Fast Acting Professional Grade Roof Cleaner for Concrete, Slate & Terracotta Roof Tiles

Roof Clean Xtreme is used by many roof cleaning professionals to clean roofs without the need for pressure washing. The formulation is a fast acting, high performance roof cleaning product that makes cleaning roof tiles easier than ever before.

Once applied, Roof Clean Xtreme can quickly remove most types of organic growth from roof tiles that have become covered in algae and ingrained dirt over time. Furthermore, this roof tile cleaner will work on clay, slate, terracotta and concrete tiles without risking damage to the roof.

To achieve the best roof cleaning results, just dilute the roof cleaning product 1:1 and use a watering can or sprayer to apply. After around 60 minutes just rinse off or lightly pressure wash the roof tiles with water. In areas of heavy surface contamination or ingrained soiling, leave the product on the surface for longer and scrub in to agitate. In some cases a re-application of the product may be necessary.

Roof Clean Xtreme is a professional grade cleaner that contains four potent cleaning ingredients. 

There are a number of benefits. Roof Clean Xtreme as listed below. It helps with the quick and easy removal from roof tiles of:

  • Black and White Lichen
  • Algae and Light Moss 
  • Bird Stains
  • Ingrained Surface Grime

As a guideline 5 litres of Roof Clean Xtreme will be enough to clean and treat approx. 40 mē of Roof Tiles.

Please note, it's important to wear appropriate safety wear at all times during the application process. For full safety information see our technical section below for more information.

To download the Safety Data Sheet, please click here



Prior to use, remove any loose debris or heavy layers of moss with a scraper or brush.

Dilute product at a ratio of 1:1. Apply liberally to the roof tiles using a watering can or pump sprayer. Leave on the surface for around 60 minutes before cleaning off with water. There shouldn't be any need to pressure wash the roof tiles.

The product becomes inactive once dry, so avoid application in hot weather to avoid losing product to evaporation. In general one application should be sufficient to removed most ingrained grime and organic growth.

  • Please note: the product has an oxidising effect and can temporarily stain lead or other flashing materials if not quickly rinsed.

Health & Safety

Roof Clean Xtreme contains chlorine which can bleach and stain fabrics and other sensitive materials, so take care to avoid contact with such materials during application. 

  • Toxic to aquatic life
  • Wear protective gloves and goggles at all times
  • Keep pets off the surface being treated when wet 
  • Keep out of the reach of children as it cause skin burns

If the product gets in the eyes, rinse heavily with water and consult a doctor if necessary.

To download the Safety Data Sheet, please click here