BuildKleen is an innovative masonry cleaner chemical that has no acids, alkalis, biocides, or bleach. An ideal monument cleaner chemical for mortar splashes, algae and dirt in 5 litre or 20 litre bottles as a ready-to-use product.

Masonry Cleaner

We also offer a concentrate version of BuildKleen in 10 litre jerrycans for professional exterior cleaners, see more detail here. With increasing demand for environmentally friendly and safe to use chemicals in masonry cleaning and building sites, BuildKleen offers a great option.

How Does It Work If It Has No Biocide?

This eco masonry cleaner works by using nano-size energy packages that penetrate and get underneath the dirt or algae (many a ‘dirty’ patio or war memorial or masonry like sandstone are in fact living microorganisms called algae that thrive in our damp climate). They do this by breaking the surface tension that holds dirt and algae embedded on a substrate ready for easy removal.

The cleaning action of BuildKleen masonry cleaner is powerful and effective and yet non-corrosive, non-acidic, non-toxic, and non-hazardous and the product is even certified as food safe; it does not kill the green growth as with biocides used in most cleaners and is safe to use near a water course.

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Masonry Cleaner

How To Apply It:

Use of a pressure washer on low pressure setting in conjunction with the use of BuildKleen masonry cleaner can be helpful to send the loosened dirt on its way after treatment. If you are washing a patio that is monoblocks please use a hood washer to save blasting out kiln-dried sand between the blocks. Brush off leaves, cobwebs and debris before you begin and apply generously with several coats it you are spraying the product.

Apply our eco-friendly masonry cleaner with brush or sprayer, saturate the surface well and then agitate with a brush – ideally wait about 15 minutes before rinsing off the dirt.

To discuss your needs, ask for samples or data sheets, please contact us at:

Acute Build Clean | 74 Bo’ness Road | Grangemouth | FK3 9BL

Tel: 01324 309100 | Email:

London Office | 47 Gee Street | Clerkenwell | London | EC1V 3RS

Tel: 0208 088 3703 | Email:

Download the BuildKleen Technical Data Sheet here

Below: BuildKleen ready-to-use eco masonry cleaner is now available in 20-litre containers with a bulk discount at £80.00 + VAT and carriage. 

Masonry Cleaner