Size: 16kg bags
Suitable for: AAC Panels, New Bricks, Old Bricks, Cement Block
Apply with: Trowel
Safe Use: Refer to the MSDS
Unitex® Uni-Dry Cote® Fast–R Render is a premium product specially formulated to be applied as a single coat either thick or thin with optimum workability, ease of application, so easy that you can relax as you work, and able to close over readily when floated or sponged. Uni-Dry Cote® Fast–R Render is suitable for covering all sound, dry AAC Panels and masonry surfaces such as brickwork and concrete blockwork, and performs the function of leveling and protecting AAC and masonry walls.
Unitex® Uni-Dry Cote® Fast–R Render is cement based and polymer modified for strong adhesion to sound AAC Panel and masonry surfaces. Uni–Dry Cote® Fast–R Render is applied directly onto clean, dust and debris-free, dry and cured AAC Panel and masonry surfaces by trowel and can be screeded if desired before being rubbed up to a true and even surface with a float. This product is workable at varying thicknesses from 4 to 10 mm. As thicker coatings can be applied in one coat and finished off very easily, applicators do not have to wait 3-7 days or more for a first coat of render to dry before applying a second coverage of render.
Unitex® Uni-Dry Cote® Fast–R Render can be simply overcoated with any of the range of Unitex Applied Finishes coating systems such as factory tinted Uni-Trowel Décor 888 liquid texture or neutral Uni-Cote® 855 blended dry powder texture and after the texture coat is dry, a suitable factory tinted topcoat such as Uni-PTC can be applied.
Unitex® Uni-Dry Cote® Fast–R Render is supplied in ready-to-use 16kg bags. Each bag allows up to 15 litres of wet render to be prepared by mixing the bag contents with approximately 4-5 litres of clean water and drilling for homogeneity.
Coverage per bag depends on the desired thickness of the render and at low build thicknesses of 4 mm covers approx. 2.5-3.5 m².
Condition of Substrate
Before application of any render, the AAC Panel or masonry surface must be clean, dry, cured and free of any dust and debris. This means that any loose or damaged substrate must be removed, or patched and repaired and any moisture must also evaporate out prior to application of Uni-Dry Cote® Fast–R Render.
The substrate surface must also be cleaned free of any grease, oils, scaling laitance, efflorescence, form-oil compounds, mould, fungi, rust, dirt, dust or any other foreign matter. Pre-painted surfaces must be either tested for adhesion² or wire-brushed back to the bare substrate. Some difficult surfaces may require a render pre-treatment.
It is the responsibility of the Builder or Head Contractor to make good any substrate to be acceptable before the next coat is applied. If in doubt, contact Unitex for advice and a site inspection visit by a Technical Sales Representative.
Adequate expansion joints are required to minimise cracking on the surface of the render. Location of the expansion joints is also the responsibility of the Builder or Head Contractor. Unitex recommends regular expansion joints to every elevation, between different substrates and between floor levels, to allow for building movements.
If such expansion joints are not provided by the Builder or Head Contractor, cracking due to movement of the substrate may occur. This is in no way indicative of faulty material. Rather it indicates sub-standard building practice.
Unitex® Uni-Dry Cote® Fast–R Render products are dry powder based products. This means that you are getting a 100% active product. All that is required is for clean water to be mixed in, on site, immediately prior to application to the substrate.
The recommended starting point is to add approx. 25% by volume (based on the amount of powder render to be used), of water into a clean container (approx 4 litres per bag). Then slowly add the powder, with drill mixing, until the desired slump (lump-free consistency) is achieved.
In dry, mild conditions, Uni-Dry Cote® Fast–R Render should be dry after 72 hours after application. When dry, Uni-Dry Cote® Fast–R Render can be overcoated with a texture from the Unitex Applied Finishes range. With certain site conditions such as shaded areas, lower temperatures or high humidity, curing of the render may take longer, even up to 7-10 days. Prior to overcoating with Unitex texture, base coat must achieve a minimum of 12% WME. Always check the weather forecast before applying renders to masonry surfaces as rain, especially within the first 8 hours after application, has a tendency to damage and weaken the render or at best, leave water marks. Heavy rain at any time during the initial 2-3 weeks may leave water marks on the surface. Should rain damage occur, the render integrity and adhesion must be checked, and any necessary repairs carried out and then allowed to fully dry prior to allowing Uni-Dry Cote® Fast–R Render to be overcoated.
Both frosty conditions and excessively high temperatures should be avoided. Unitex recommends applying Uni-Dry Cote® Fast–R Render in temperatures greater than 8ºC and less than 30ºC. Should hot and windy conditions be encountered after commencing rendering, dampen the substrate with water. Do not apply render until the “wet” look has receded and the surface has absorbed the free water. This will enable Uni-Dry Cote® Fast–R Render to remain as workable as it is in milder conditions.
Unitex® Uni-Dry Cote® Fast–R Render:
- Premium render that offers greater efficiencies to applicators such as moving the scaffolding much less
- Trowels on easily in both thick and thin layers.
- Most jobs need only one coat of Uni-Cote® Fast–R Render – you decide how thick it should be!
- Can be screeded to a smooth surface
- Improved workability and finishes off without holes or tearing
- Is polymer–modified for strong adhesion to masonry surfaces
- Just Add Water– less margin for errors
- Is render machine pumpable
- After drying can be overcoated with Unitex Applied Textures
- Consistent quality
Guide to Good Mixing Consistency
- Add the contents of the bag slowly to 4 litres of water (25% volume of entire bag) with vigorous drill mixing to ensure a lump free render of required slump.
- The mix can be later water thinned to required viscosity
- Ensure wall surface is stable, clean, dry and free of dust, etc., prior to application.
- For difficult masonry and non-masonry surfaces contact Unitex for product and surface preparation advice.