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Weber Saint-Gobain - Official website of the company

weber CL150

weber CL150
weber CL150

Product Benefits

  • Can be used on most exterior surfaces, including brickwork, blockwork, concrete, stone, cement based board, gypsum plaster, timber and previously decorated surfaces
  • Suitable for use in the preparation of surfaces where the Weber range of renders and decorative finishes are to be applied

Masonry biocide which can be used on most exterior surfaces

Product Features

About this Product

weber CL150 is a water-based masonry wash containing carefully selected biocides effective against a broad range of bacterial, fungal, algal, yeast and mould species. It is used as a masonry cleaner and steriliser to kill green, black and other organic growths on walls and other masonry, particularly prior to the application of decorative finishes.

Note: weber CL150 can be supplied tinted for ease of identification of treated areas. If weber CL150 is being used to treat finished surfaces, ensure that unpigmented weber CL150 is specified.

Features and Benefits

  • Fast acting
  • Simple application
  • Established track record in varying climatic conditions
  • Untinted versions show no residue after treatment
  • Ready for use
  • 25-litre tinted version for easy identification of coated areas

Technical Data

Water based solution of chemical biocides approved by Health and Safety Executive and by Dept. of Agriculture for Northern Ireland.

Technical Services

weber's Customer Services Department has a team of experienced advisors available to provide on-site advice both at the specification stage and during application. Detailed specifications can be provided for specific projects or more general works. Site visits and on-site demonstrations can be arranged on request.

Technical helpline
Tel: (01525) 722110
Fax: (01525) 718988

Sales Contact

Sales, England and Wales
Tel: (01525) 722100
Fax: (01525) 718988

Sales, Scotland
Tel: (0141) 445 0121
Fax: (0141) 445 0122

Sales, Ireland
Tel: (028) 9335 2999
Fax: (028) 9332 3232


Product Datasheet

Material Safety Datasheet

Send or download the documents

You can either send the documents to an email address, or download it

Preparation & Application


Organic growths may indicate consistently damp conditions. Sources of moisture should be identified and rectified to prevent reoccurrence. Condensation, rising damp, faulty plumbing or guttering, etc. should be considered as possible sources.


As soon as access is available, drench apply weber CL150 solution onto the wall surfaces ensuring they have already been tested for soundness.

Where existing bossed render is being removed as part of the preparation, weber CL150 solution should be applied to the affected areas after the defective render has been removed.

weber CL150 is ready for use.

When treating large areas, weber CL150 is best applied using a pressurised knapsack or garden sprayer but can be brush applied if areas are limited. weber CL150 must be left for a minimum of 48 hours to take effect and kill the growing moss and unseen spores. Dead growth should be removed by brushing with a stiff bristle or wire brush or alternatively by power washing.

Wear protective clothing and safety equipment.

Do not apply weber CL150 in rain or in temperatures below 5°C or above 30°C  or if exposure to these conditions is likely within 24 hours of application.


All equipment must be cleaned immediately after use with water. Waste material should not be emptied into drainage systems.

Packaging, Health & Safety


weber CL150 is supplied ready for use in 25 litre bottles.
The tinted option is available in 25 litres only.

Coverage / Yield

Coverage is approximately 0.1 litre/m2.

This will vary considerably depending on the suction of the substrate and method of application.

Storage and Shelf Life

Store in cool, dry conditions at a temperature greater than 5°C. Protect from sunlight and sources of direct heat. The container should be kept sealed when not in use.
25 litre plastic drums - stack no more than 2 high.
Shelf life of product stored in correct conditions is 12 months.

Health and Safety

Contains coco alkyl dimethyl benzyl ammonium chloride.

Harmful in contact with skin and if swallowed.

In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.

After contact with skin, wash immediately with plenty of soap and water. Wear suitable gloves and eye/face protection.

For further information, please request the Material Safety Data Sheet for this product.