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Waterproof porous tiles and grouts:

S900 is a clear, high pH, deep penetrating siloxane waterproofing solution. S900 penetates in to the tissue of the porous substrate and create a barrier, below the surface, to prevent the ingress of water. S900 is an effective waterproofing solution and stops leaks without lifting tiles or changing the overall appearance of the surface. S900 also solves the problems associated with water penetration such as corrosion of steel reinforcement,  friability  and binder loss of surfaces, fungal and bacteria attack and degradation due to carbon dioxide permeability. S900 is capable of withstanding high pH conditions such as found in new concrete and lime based mortars and bricks. S900 still allows the diffusion of vapours or 'breathing' ability of the substrate.
The properties of S900 make it ideal for use on: Waterproofing external concrete, render, brick, block walls, FC sheeting, sandstone and porous pavers. Prevention of efflorescence (white salt spotting or leaching). Protection of sandstone. General rain water barrier. CAUTION: Sealed surfaces may be slippery when wet.   
Suitable Surfaces
S900 has been used successfully on the following porous substrates if applied as per Data Sheets. Concrete. Block work. Bricks. Cement Render. Cement sheet. Porous pavers. Sandstone. FC sheeting   
The information contained in this product data sheet is typical but does constitute a full specification as conditions and specific requirements may vary from project to project. The instructions should be considered as a minimum requirement but the applicator or contractor must use their skill, knowledge and experience to carry out additional works as may be necessary to meet the requirements of the project. Specification for specific projects should be sought from the Company in writing.   
S900 penetrates in to the tissue of the substrates and accordingly relies its soundness and stability. S900 will not bridge cracks. In order for S900 to work effectively, sufficient product must be absorbed in to the surface to fill the voids within the substrate. Highly porous, sandy and friable surface may not contain sufficient density to allow the S900 to create an adequate 'build-up of S900 to form waterproofing barrier. Test area are highly recommended.
Benefits and Advantages   
Forms a waterproofing barrier without changing the overall appearance of the surface.     
Highly economic solution.   
Long lasting protection.   
Quick drying .   
Dries clear in a flat (no gloss) finish.   
It can be re - coated.   
Precautions in Use
When applying S900 it is strongly recommended that all safety precautions are followed as per product label and data sheet. As the product contains solvent ensure that all sources of ignition are kept away. Ensure area is well ventilated. Adequate masks should be worn when spraying. Protect surrounds against over-spray. Observe all precautions on the Material Safety Data Sheet. In exposed areas, do not apply if rain is imminent  and protect coating from rain and inclement weather until fully cured. As a precaution, we suggest that , at least initially, the surface may be slippery if wet.    
Priming and Surface Preparation   
Good preparation is essential. Surfaces must be sound, stable, dry, clean and free of dust, loose, flaking, friable material and substances that may diminish adhesion.   
All surfaces must be clean, dry, of sound construction, stable and free of any dust, dirt, grease, oil, curing compounds or contaminates that might interfere with adhesion.   
Cracks must be repaired. If mortar is suitable then use a non-shrink mortar. If flexibility is required to repair the crack, this should be done after the application of S900 as the solvent may pit or slightly dissolve the sealant.   
Loose grout must be removed and then replaced with sound grouting and allowed to dry.   
Ensure surfaces are clean, free of other coatings such as paints and sealers and the substrate is dry.   
Test areas are important as, although rare, latent salts or other chemicals may cause some discolouration.
S900 can be applied by brush, roller, spray or poured.     
It is essential that the substrate be well saturated.   
For best result, apply a soaking coat of S900 and allow product to be absorbed. Immediately thereafter, while still   wet, apply a second soaking application and allow the product to be absorbed. This process can be repeated several times to ensnure that sufficient product has been absorbed. The product should be, in the first instance, applied wet on wet. Then allow the product to dry for 24 hours and apply a final soaking coat.   
The stated average coverage rate may vary depending upon type, condition, porosity, texture of the surface and application technique.     
General coverage rate for S900 is 5 to 6 sq m per litre per coat and is usually applied in 3 coats. The porosity and density of the substrate may require the use of additional material. Our recommendation is to err on the use of additional material as the initial absorption , wet on wet, is very important. Once cured, the absorption  of additional material is greatly reduced.   
S900 is a clear product.   
Drying and Curing   
Drying and curing of the product is affected by type, dryness and porosity of the surface, temperature, humidity, ventilation, climate conditions and application technique and therefore drying and curing can only be given as a guide.   
At 25 C and 50% RH (per coat) Touch dry: 2 to 6 hours Set: 6 to 12 hours Full cure: 24 to 36 hours Service Temperature: 10 C to 50oC Application Temperature: 5 C to 30 C   
S900 should be stored in a cool, dry place. Must be kept clear of all sources of ignition and damage. Shelf life is up to 12 months in unopened or undamaged containers. Available in 4 litre. and 20 litre pails.   
Clean Up
All tools and equipment should be cleaned in Solvent as soon after completion as practical.   
Tiling, Topping or Top Coating
Not recommended as product is usually left exposed. If area is to be tiled or topped, then we would recommend the use of Wrimco's conventional waterproofing membranes.   
Safety & Precautions
Sealed surfaces may be slippery when wet. The use of Solvent resistant gloves, mask and eye protection is recommended. Observe the safety precautions on the Product data sheet and Material safety Data Sheet. Class 3 dangerous goods must be declared prior to the transportation of the product. Product is flammable. Keep all ignition sources away.     
For full safety data refer to the products Material Safety Data Sheet. Observe precautions as per label. 


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