Product Name: STABILISED EARTH WATER REPELLENT S
Description:
Stabilised earth water repellent s is a solvent-based silane/siloxane impregnant for stabilised earth or rammed earth structures. The product is designed to penetrate into the capillaries of substrate and render the substrate water repellent. This water repellent zone reduces the absorption of water or efflorescence or other water-borne staining materials which are responsible for the bulk of the deterioration in rammed earth structures. The treatment will not significantly change the appearance of the substrates and the vapour permeability. However, a slight darkening of the surface may occur for some substrates.
Recommended Uses:
Stabilised earth water repellent s is recommended as a water repellent sealer for stabilised earth or rammed earth buildings. It is also suitable for other masonry substrates including natural stones, concrete masonry, bricks, and tiles & grout. Some of the important features of Stabilised earth water repellent s include:
- Penetrates into substrate surface.
- Permanently bonds to the substrate with no peel or blister.
- UV, alkali stable and durable formulation.
- Reduces water penetration, efflorescence and water-borne staining.
- Does not significantly change the surface appearance and vapour permeability.
- Easy application and cost effective.
As masonry materials vary significantly, a test MUST be carried out prior to application to find out the suitability of this product for the purpose.
Use Instructions:
Application
Please read the product information for the correct application and safe handling. Do not apply if rain or extreme weather conditions are expected. The surface to be treated should be dry, firm and free from grime, oil and any previous coatings/sealers. If necessary, the surface should be washed with a suitable detergent in water and allowed to dry. All cracks should be filled with proper grouting materials and allowed to cure before application. A test prior to application is strongly recommended to determine of the number of coats required and suitable consumption rate.
Stabilised earth water repellent s can be applied using brush, roller or spray. However, the product is preferably applied by saturation flooding using a hand pressure spray or airless spray equipment. Sufficient material should be applied to the surface to ensure adequate penetration. For the vertical surface, the product should be applied as a liquid thin film stream which runs down the surface approximately 30-40cm. A second application should follow immediately after the first coat is absorbed by the surface. This is termed a “wet-in-wet” application. The object is to saturate the surface to allow a better penetration.
For horizontal surfaces, the product should be applied by flooding the surface for about 10 minutes to ensure the penetration of product into the surface. If the sealer is quickly absorbed by the substrate after the first application, a second coat may be required immediately. Any remaining liquid on the surface which has not been absorbed by the surface for 10 minutes should be removed to avoid any excessive accumulation of the sealer in surface areas which may cause an uneven finish.
The number of applications depends on the permeability of the substrate. Generally, for very dense surfaces one application may be enough but for permeable substrates, two or more coats “wet-in-wet” may be required.
Do not splash or spray the product onto any area you do not wish to treat. If splashing occurs the product should be removed with a cloth dampened with a solvent such as mineral turpentine immediately.
Consumption rate
The consumption of Stabilised earth water repellent s varies significantly depending on the permeability of the substrate. It may be of the order of 1-10 m2 per litre per coat or could be out of this range significantly.
After application
The initial surface water repellency will develop after the surface is dry. Full curing may take 24 hours or up to 7 days. Avoid heavy traffic or any staining for at least 24 hours. The equipment can be washed in a solvent such as mineral turpentine.
Pilot testing and quality control
Due to the variation of building materials, it is strongly recommended that a pilot test on a small area on site should be conducted prior to application to find out the suitability of this product for the purpose.
Typical Data:
- Appearance: Colourless liquid with hydrocarbon solvent odour
- Solids content:<50% by weight
- Specific Gravity:0.79g/ml at 20 oC
- pH value: Not allocated
- Solubility in water: Insoluble in water
- VOC content: >50%
- Flash point:>38oC
Important Note:
Stabilised earth water repellent s penetrates into the capillaries and renders the surface water repellent while still leaving most of the capillaries open to allow water vapour to pass through. It reduces water absorption by capillary action. However, it has a limited resistance to water penetration particularly under prolonged contact or hydrostatic pressure. Therefore, in some cases where the substrate is very permeable or there is extreme wind driven rain, resistance to water penetration or water-borne staining may not be adequate.
Handling & Storage:
Stabilised earth water repellent s is a hazardous and flammable material. Refer to the material safety data sheet for safe handling. Follow good industrial hygiene procedures when using this product. Vapour inhalation and skin or eye contact should be avoided by wearing proper protection. Wear an air-purifying respirator if there is risk of exposure to high vapour concentrations. Wash hands after handling. The product should be stored in closed containers in a cool dry place away from any fire and ignition sources. The product has a shelf life of 12 months in a sealed original container under 25oC.
Use with sufficient ventilation away from any fire or ignition sources!
Keep out of reach of children!
Packaging:
Stabilised earth water repellent s is available in 5, 20 and 200 litre metal drums.
