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- Single-pack, clear hydrophobic treatment for mineral surfaces. Forms a water-repellent barrier while allowing breathability.
- Suitable for mineral plasters, exposed concrete, sand-lime bricks, cement fibre boards, and uncoated porous natural stones.
- Highly water-repellent and vapour-permeable, protecting against water ingress, acid rain, and environmental pollutants.
- Non-film-forming with deep penetration into substrate pores for long-lasting performance.
- Classified as a flammable liquid. Restricted to professional use.
- Manufactured to high standards with strong resistance to alkalis, weathering, and UV exposure.
Description
Professional Hydrophobic Treatment for Mineral Surfaces
Keim Lotexan is a professional-grade hydrophobic impregnation treatment designed to protect mineral-based surfaces. Its silane/siloxane formulation penetrates deeply into the material’s pores, forming a water-repellent barrier without blocking vapour diffusion. This ensures long-term protection against moisture ingress, acid rain, and environmental contaminants while preserving the natural appearance of the substrate.
Suitable Surfaces for Application
This treatment is ideal for use on a wide range of mineral surfaces, including:
- Mineral plasters and paints
- Exposed concrete and prefabricated concrete elements
- Sand-lime bricks and cement fibre boards
- Porous natural stone, both alkaline and neutral
It is not suitable for non-absorbent surfaces, glazed ceramics, or previously sealed substrates.
Long-Lasting Protection and Key Benefits
- Excellent water-repellent properties
- Allows vapour permeability to prevent trapped moisture
- Resistant to weathering and UV degradation
- Non-film forming, preserving the substrate’s original appearance
- Deep penetration for durable protection
Application Guidelines for Optimal Performance
Keim Lotexan should be applied to clean, dry, and absorbent substrates. It is recommended to apply using a brush or a flooding method in two coats, wet-on-wet, with a 10-minute interval.
- Ensure the surface is free from dust, grease, and contaminants.
- Apply when the ambient and substrate temperature is above 5°C.
- For previously treated surfaces, allow sufficient curing time before application.
- Do not spray the product to avoid wastage and overspray on unintended areas.
Always refer to the downloadable technical data sheet for full application details.
Usage Restrictions and Limitations
Keim Lotexan should not be applied on non-porous surfaces or substrates previously treated with non-compatible coatings. It must not be diluted, mixed with other substances, or applied under humid conditions. Ensure all surrounding surfaces, including glass and ceramics, are covered before application. In case of contact with unintended areas, rinse with plenty of water immediately.
Health and Safety Information
Keim Lotexan is classified as a flammable liquid and must be stored in a cool, dry, and well-ventilated place away from ignition sources. It contains Naphtha (petroleum), which may cause drowsiness, dizziness, and long-term damage with repeated exposure. Proper protective equipment, including gloves and eye protection, should be worn during handling and application.
- UN Number: 1993
- Hazard Class: Flammable Liquid (Class 3)
- Environmental Hazard: Toxic to aquatic life
- Contains Diisocyanates: No
Refer to the safety data sheet for full health and safety guidance.
Product Details
3472-466906
Data sheet
- Manufacturer
- Keim
- For Use On
- Concrete, Sandstone
- Application Method
- Brush, Spray
- Colour
- Clear
- Single, Two or Three Pack
- Single
- Pack Size
- 5L
- UN Number
- UN1993
- Application Method
- Brush
- Application Method
- Spray
- Product Usage Type
- Sealer
- Product Range
- Lotexan
- Colour Family
- Clear
- Categorised As
- Masonry Impregnation & Waterproofers
Questions
Question about the product
 Gareth on 2023-06-01 20:21:35 | Question: What Keim product is best on a blue engineering brick chimney? Thanks |
Answer from Rawlins’ Technical Team: Please can you provide more information and pictures of the project to [email protected] so we can assist with a recommendation. | |
| D Owen on 2021-09-12 10:22:17 | Question: I need to waterproof some flashing area on an asbestos roof. If I use lotexcan would that cause any problems on the asbestos! Many thanks |
Answer from Rawlins’ Technical Team: This product is designed for application to natural stone, assuming the flashing is lead it is clean, dry sound and prepared as detailed in the technical data sheet we can recommend Rust-Oleum Mathys Fillcoat Fibres. If any areas of the asbestos are to be painted this should be primed first with Rust-Oleum Mathys Primer 44 HS. | |
IMPORTANT SHIPPING & DELIVERY INFORMATION
Keim Lotexan is only available with the shipping and delivery timescales listed below - please do not contact our Customer Support Team with enquiries about alternative or earlier shipping and delivery times.
Saturdays and Sundays, as well as Bank Holidays, are not classed as working days.
Orders placed after the cut-off for this product will not be processed for earliest dispatch until 9am the next working day.
All delivery costs below are excluding VAT