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PATCHFIX FINE RENDER SINGLE COMPONENT CEMENTITIOUS BASED FINE FAIRING MORTAR 15 November 2017 YOUR SMART ADVANTAGES PRODUCT CHARACTERISTICS Colour Grey - Single component system of pre blended powder, simply add water and mix Size 20kg - Excellent bond strength and adhesion to concrete or masonry surface Item Number 30840155 - Feather edging capability - Shrinkage compensated allows for long APPLICATION INSTRUCTIONS term dimensional stability - Easy to use and apply - For internal or external use Substrate and Surface Preparation - Durable, low water permeation Surfaces to which Bostik Patchfix Render Fine are - High ultimate strength applied, should be clean, sound and free of dust and - Can be used in vertical, horizontal and loose particles. Cement laitance, oil, grease, mould overhead application release oil or curing compounds must be removed from - Can be coated with Bostik range of concrete surfaces by using a wire brush, bush hammer, protective coatings scrabble, grit blasting or other means. Ensure that steel - Australian Made rebar’s are also clean from grease, oil or rust. When repairing spelled or deteriorate concrete, ensure that the concrete has been cut back to sound material. Steel surfaces should be degreased with a suitable solvent or DESCRIPTION treated by grit blasting. In many cases where corrosion Bostik Patchfix Render Fine is a polymer modified is present, wire brushing to a clean bright surface is fairing mortar for applications in thin layers. It produces sufficient. All absorbent surfaces to be treated with Bostik Patchfix Render Fine must be thoroughly a natural concrete Grey appearance to concrete or dampened to saturate all pores. During application, the masonry surfaces. It can be applied from feather edge temperature of the substrate should not be below 5°C. up to a maximum thickness of 5mm. Bostik Patchfix To avoid high surface temperatures, it is advised to Render Fine is shrinkage compensated and based on shade areas before, during and after application. hydraulic binders, high-grade quartz sand and synthetic polymers Priming Pre soak areas in which Bostik Patchfix Render Fine is to USES be applied with water prior to application. For very Thin layer patching for vertical, horizontal and overhead porous substrates it is essential that after pre soaking applications. (no free water) the substrate Bostik Bond 'N' Cure be Rendering over porous or damage concrete structures applied to the substrate and allowed to reach a tacky such as walls, water tanks, and sewerage and water consistency prior to the application of Bostik Patchfix treatment plants. Render Fine. Levelling of uneven surfaces prior to coating. Repairs where high compressive strength and abrasion resistance required. Repairing honeycomb concrete, cracks and pinholes Patching of Tilt slab and pre-cast concrete. As of render over brickwork, concrete & other common masonry is required. As an integral base for application of Bostik range of protective coatings. Applications requiring thin build of feather edge to 5mm in one application. Bostik Australia Pty Ltd, Level 1, 6 English St, Essendon Fields, Vic, 3041, Australia. Tel: +61 3 9279 9333 www.bostik.com.au Version 7 Page 1 of 4 PATCHFIX FINE RENDER Single Component Cementitious Based Fine Fairing Mortar MIXING and should be applied immediately after final trowel. In Small quantities (up to 5kg) can be mixed by hand, using very extreme temperatures and drying conditions, a suitable mixing drum or bucket and trowel or mixing supplementary curing with polythene sheeting, taped drill with stirrer, after ingredients have been volume down at the edges, may be required. Large areas should batched. Volume batching method – measure 5 be cured as trowelling progresses (0.5m2 at a time) volumes of: without waiting for completion of the entire area. Bostik Patchfix Render Fine (loose filled to excess in container and struck off level with top) and 1 volume of APPLICATION OF COATING clean, drinking quality water. Place water in a suitable Bostik Patchfix Render Fine, when cured, has good mixing vessel and add Bostik Patchfix Render Fine resistance to water. However, if areas are subject to whilst continuously mixing with trowel in one operation continuous water immersion or chemical attack from for 3 to 5 minutes until fully homogenous, uniform and solvents or organic acids etc., Bostik Patchfix Render lump free. Greater quantities of Bostik Patchfix Render Fine should be protected using Bostik’s range of Fine must be mixed with a mechanical forced action coatings such as Bostik Guardcote WB, Bostik mixer with a high shear stirrer. Depending on the Epoxycote WB or Bostik Paveseal SB depending on ambient temperature and the desired consistency, the aesthetic and performance requirements. The required amount of water required may be varied slightly but epoxy or acrylic coating will act as a sealer and dust should remain between the 7-8 litres per 20kg bag of proofer which may be easily cleaned and is resistant to a Bostik Patchfix Render Fine. In all cases Bostik Patchfix range of oil and chemicals depending on the choice of Render Fine must be added to the water. coating. To ensure a long lasting highly protective DO NOT MIX LARGE QUANTITIES BY HAND coating, it is recommended that two coats be applied. The first coat should be applied 12-24 hours after the APPLICATION placement of Bostik Patchfix Render Fine. The second Apply the mixed Bostik Patchfix Render Fine to the coat may be applied the following day in accordance prepared substrate by steel trowel from a feather edge with the selected coating’s application instructions. up to 5mm thickness. Placement should be carried out with a minimum of working and be allowed to partly set COVERAGE before. Finally toweling to a smooth finish. If a very The approximate coverage is obtained if mixed in smooth finish is required, a steel trowel should be used. accordance with recommended procedures and Excess water on the surface will result in surface accurately measured water content. A 20kg bag of crazing and cracks. Do not proceed with the application Bostik Patchfix Render Fine with 8 litres of water will when rainfall is imminent unless in a sheltered or yield approximately 17 litres. Approximately 77 bags protected situation. DO NOT ADD EXCESS WATER. Note: required per cubic metre. Maximum applied thickness of Bostik Patchfix Render Fine is 5mm. Bostik Patchfix Render Fine may be applied POT LIFE greater than 5mm up to 15mm in isolated smaller Setting begins after 30-45 minutes (at 25°C substrate patches. Consult Bostik office for additional and ambient temperature) and ends after another 50- information. 60 minutes. The working period depends very much on the product temperature and on the amount of mixing FINISHING water added. Therefore, the time given above should be Bostik Patchfix Render Fine is finished by striking off regarded as a guideline. The lower the temperature, the with a straight edge and closing with a steel float. longer the setting time. The less water added the Wooden or plastic floats or damp sponges may be used shorter the setting time. The addition of water to the to achieve the desired surface texture. The completed mortar after it has started to stiffen is not surface should not be overworked. recommended and the product should be discarded. Low Temperature Working Important Notes In cold conditions down to 5°C, the use of warm water Bostik Patchfix Render Fine should not be used (up to 30°C) is advised to accelerate strength when the temperature is below 5°C and greater development. Normal precautions for winter working than 35°C. with cementitious materials should then be adopted. For concrete substrates subject to rising damp or The material should not be applied when the substrate moisture, a moisture barrier is required use Bostik or air temperature is 5°C and falling. Moisture Seal. Where a substrate is subjected to total immersion it is recommended that Bostik High Temperature Working Techflow Epoxy Grout be used as a primer. At ambient temperatures above 35°C, the material (Contact Bostik for Technical Data Sheet) should not be used as this will cause premature setting New concrete surfaces must be at least 14 days old and make working with the product difficult. prior to application of Bostik Patchfix Render Fine To avoid rapid drying protect Bostik Patchfix CURING Render Fine from direct sunlight or drying winds Bostik Patchfix Render Fine does require curing. In hot, during actual application, and while curing for up to dry windy condition all cementitious-based mortars 24 hours. must be protected against excessive rapid surface If the substrate onto which Bostik Patchfix Render drying and evaporation. Bostik Patchfix Render Fine Fine is applied moves or cracks, reflective cracking must be cured immediately after finishing in will occur in the Bostik Patchfix Render Fine. accordance with good concrete practice. The use of Not intended as a horizontal trafficable-wearing Bostik Bond 'N' Cure sprayed, brushed or rolled onto the surface. (Refer to Bostik Office for the Bostik surface of the finished Bostik Patchfix Concrete in a Patchfix or Bostik Ultralevel range of product best continuous film, recommended. The Bostik Bond 'N' suited to trafficable applications). Cure should be applied at coverage of 4-5m2 per litre Bostik Australia Pty Ltd, Level 1, 6 English St, Essendon Fields, Vic, 3041, Australia. Tel: +61 3 9279 9333 www.bostik.com.au Version 7 Page 2 of 4 PATCHFIX FINE RENDER Single Component Cementitious Based Fine Fairing Mortar BOSTIK CO OPERATIVE TEST PROGRAME Drying/Shrinkage Time Bostik offer a service in which a program has been Tested in accordance with AS1012.13 established to eliminate potential field problems by Time (days) Shrinkage (Microstrain) pretesting Bostik adhesives with samples of building 7 days <280 Microstrain materials to which the adhesive will be applied.
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