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Roof Cleaners
Keep rooftops clean, safe, and ready for action with powerful, professional roof cleaners. These specialist solutions tackle the grime and growths that cause damage and reduce surface performance. Algae, moss, lichen, mould and years of pollution are no match for trade-grade biocidal washes and degreasers that work fast and rinse clean. Whether you’re cleaning clay tiles ahead of applying pitched roof paints or preparing a surface for flat roof paints, these products offer exceptional cleaning strength with options for rinse-free application, low-pressure spray use, and roof-safe formulas for delicate or porous surfaces. For the best finish and longest life from your roofing system, clean first, then coat – whether you're using roof paints on membranes or refreshing older coverings with roof tile paints.
SmartSeal Xtreme Roof Cleaner
Fast acting roof cleaner. For concrete, clay, slate and terracotta roof tiles. Removes algae, dirt and grime. Important! Please note: Application in hot weather is not recommended, as some product will be lost to evaporation.
Tikkurila Panssaripesu Roof Cleaning Agent
An emulsifying cleaning agent containing ammonia for cleaning metal-sheeted roofs and zinc-coated surfaces prior to painting. Emulsifies dirt, grease, oil etc. Suitable for cleaning both new and old zinc coated surfaces
Tikkurila Iso A Clean
A water-dilutable cleaning product to be used on outside surfaces, such as roofs, facades, paving stones, skylight windows, plinth courses and walls, removing dirt and grease effectively.
Cromar Patination Oil
Cromar Patination Oil is specially developed to reduce unsightly staining due to white carbonate and to impart a pleasing appearance to newly applied lead sheet and flashings. For professional use Specially formulated to provide a protective film coating enhancing the lead colour Suitable for all external applicational to lead‐work...
SmartSeal Roof Revive
Organic matter, algae and mould remover. For concrete, slate and clay roof tiles. No need for pressure washing or scrubbing. Eliminates risk of spores re-forming.
Sika Mould Buster
A powerful, fast acting solution which is effective on most surfaces. It removes algae, mould and green growth without the need for scrubbing or pressure washing. Approved under the Control of Pesticides Regulation 1986 (as amended) for use as directed. HSE No 8376. Also approved for use in Ireland, PCS No. 96329. No scrubbing or pressure...
Hydron Mona-Clean Algae Remover
Mona-Clean Algae Remover is a specially prepared, ready to use wash. Designed for use before painting or treating with protective impregnators to kill spores of mould and algae. Protects against re-infection for up to 3 years For use on exterior roofs, facades, floors and landscaping Brickwork, concrete, natural stone, render, and more...
Hydron Mona-Clean Brick Cleaner
A strong acidic liquid specifically formulated to remove heavy grime deposits from sandstone and brick. For use in conjunction with pressure washing Suitable for exterior roofs, facades, floors landscaping products, internally on floors and many more examples below
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Professional Roof Cleaning Products for All Roof Types - Moss, Algae and Dirt Removal
Roof cleaners form the first critical step in any professional roof maintenance, refurbishment or coating system. Designed to dissolve and dislodge stubborn biological growth, dirt, and industrial fallout, these powerful formulas restore roof surfaces quickly and safely. Products in this range work across all roof types - from tiles, slates and bitumen to rubber membranes and asbestos cement. The right cleaning product ensures surfaces are free of contamination and ready for long-term protection, especially where adhesion of coatings and primers is essential.
Application methods vary to suit the task. Some products require no rinsing and continue working after application, ideal for sensitive roof structures or limited access sites. Others respond well to low-pressure spraying, allowing faster coverage of large or awkward surfaces. Roof cleaners are suitable for use in housing estates, public buildings, industrial units, and commercial estates, offering reliable performance with reduced disruption. These products are especially useful for preparing roofs before applying solar-reflective paints, liquid waterproofing systems, or anti-moss topcoats. Depending on roof condition, one-off or seasonal use is recommended - particularly in damp climates or tree-covered locations. Technical support is available to help specify the right cleaner for each surface, weather condition, or follow-on coating.
Roof Cleaner FAQs
Can I use a roof cleaner on asbestos cement sheets?
Yes, but choose a non-aggressive cleaner compatible with asbestos. Avoid pressure washing. Always follow safety guidelines and containment measures.
Are these cleaners safe for plants and gutters?
Rinse surrounding vegetation with clean water before and after application. Protect gutters and run-off areas to prevent damage or contamination.
How long should I leave the product before applying a roof coating?
It depends on the product used - some require 24–48 hours. Ensure the surface is dry, clean, and free from residues before coating.
Do I need specialist PPE when using roof cleaners?
Yes. At minimum, wear gloves, eye protection, and non-slip footwear. Use fall arrest systems when working at height.
Are these products effective against black mould or mildew?
Yes. Many contain biocides effective against a wide range of fungal and microbial growths, including black mildew stains.
Can I use roof cleaners as a preventative treatment?
Yes. Biocidal washes continue to work after application, helping delay the return of moss and algae in damp areas.