KEIM Lotexan N, 5 Litres

UN1993 (Class: 3, Pk Grp: III)
A siloxane based water repellent impregnation to reduce the water absorption of natural stone. Also used as a dust suppressant.
Available in 5 Litres
£120.43 £100.36
In stock
Product Description

Keim Lotexan N is a siloxane based water repellent impregnation to reduce the water absorption of natural stone. Also used as a dust suppressant.

Keim Lotexan N penetrates into the pores of the natural stone. Once the solvent has evaporated, the active ingredient is deposited on the walls of the pores and develops its water repellency by reacting chemically with the moisture normally present in the stone and the atmosphere.

Best Uses

Keim Lotexan N is suitable as a water repellent protective treatment, in particular for uncoated, porous natural stone. It can be used to protect all common kinds of natural stone, whether alkaline or neutral, from water, acid rain and atmospheric pollution. This treatment does not seal the pores in the natural stone, ensuring that its water vapour permeability remains practically unchanged.

  • Easy to apply
  • Water vapour permeable
  • Totally clear
  • Surfaces shows no sign of treatment


All gaps, cracks and holes in the substrate must be filled prior to any further treatment. Any suspect mortar jointing should be raked out and re-instated where necessary. Any newly repaired areas must be allowed to dry out for a minimum period of 15 days prior to the application of Keim Lotexan N. All surfaces should be washed down with clean cold water to remove all surface dirt and dust.

Keim Lotexan N should be applied by low pressure spray or brush, working from the bottom of the substrate upwards, firstly in a horizontal manner. After a period of approximately 10 minutes a further application may be applied, again from bottom to top, this time in a vertical manner, thus ensuring that all facets of the substrate are well coated. It is important that Keim Lotexan N is applied onto a dry surface and during a period of time of at least 2 hours when no rain is expected. To prevent the possibility of water ingress through adjoining walls, which would migrate through to the offending areas, contractors should apply Keim Lotexan N products in the manner mentioned above onto any flank or adjoining walls for a depth of at least 1 metre down these walls, even though these areas may not be exhibiting water
ingress internally.

A minimum depth of penetration of 2mm is usually necessary in order to achieve effective water repellency.

Technical Details


Components: Single Pack 
Type: siloxane based water repellent impregnation
Finish: -
Stock Colours: Colourless
Tintable: No
Suitable Substrates: Uncoated porous natural stone
Application Method: Brush or  Spray
Theoretical Coverage: Approx. 0.4lt/m2 for two coats.
Application Conditions: Ambient and substrate temperature above 5°C and below 30°C
Application:  Apply to a dry surface and during a period of time of at least 2 hours when no rain is expected
Waiting Time:  After a period of approximately 10 minutes a further application may be applied
Cleaner / Thinner: Clean tools with water immediately after use
Shelf Life: Approx. 12 months, if kept cool, but frost free tightly closed containers
Packaging: Available in 5 Litres

The manufacturers data sheets are available for download from this website. It is your responsibility to read and understand all aspects of the data sheets before you place an order and prior to application. Please pay special attention to the preparation, mixing and application temperatures of the product, cleaning of substrate and environmental factors such as temperature, rain etc. Quoted coverage rates are based on the manufacturers theoretical rates and may vary depending upon substrates absorption, texture and application. We always recommend a test is carried out to ensure suitability.

Customer further agrees that Promain have no liability for any errors or omissions contained within the Product Data Sheets and are not liable for failure due to misapplication or inadequate substrate cleaning and preparation. For more information please refer to our Terms & Conditions.

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