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32857 Parchem Technical Data Compendium 2015_Crop4emag.pdf

CONTENTS CONCRETE REPAIR CORROSION CONTROL GROUTS & ANCHORS PROTECTIVE COATINGS INDUSTRIAL FLOORING SURFACE TREATMENTS JOINT SEALANTS CONCRETE JOINTING ROOFING WATERSTOPS WATERPROOFING JOINT FILLERS TIMBER FLOORING ALPHABETICAL Application Instructions Preparation All surfaces should be dry and free from contamination such as oil, grease, loose particles, decayed matter, moss, algal growth, laitance, and all traces of mould release oils and curing compounds. This is best achieved by lightly gritblasting INDEX 166 the surface. Where moss, algae or similar growths have occurred, treatment with a proprietary biocide should be carried out after the grit-blasting process. Note: it is not necessary to remove Fosroc’s Nitobond AR curing membrane prior to the application of Dekguard Clear. Where application over existing sound coatings is required, trials should be conducted to ensure compatibility and retention of the bond between the underlying coating and substrate. For further advice, consult your local Parchem sales office. It is essential to produce an unbroken coating of Dekguard Clear. To ensure this is achieved, surfaces containing blowholes or similar areas of pitting should first be filled using Renderoc FC, a cementitious fairing coat (for further details, refer to separate Technical Data Sheet). Renderoc FC should be allowed to cure for approximately 48 hours dependent on ambient conditions before the application of Dekguard Clear. Application In order to obtain the protective properties of the Dekguard Clear system, it is important that the correct rates of application and overcoating times are observed. Dekguard Primer Number of coats: As required to achieve absorption of specified quantity Theoretical application rate: 0.4 litres / m² / coat Minimum dry film thickness: N/A Overcoating time at 20°C: 2 hours Dekguard Clear Number of coats: As necessary to give required carbon dioxide diffusion resistance Theoretical application rate: 0.14 litres / m² / coat Minimum dry film thickness: 20 microns per coat Overcoating time at 20°C: 6 hours Application of either Dekguard Primer or Dekguard Clear should not commence if the temperature of the substrate is below 2°C. Any areas of glass should be masked. Plants, grass, joint sealants, asphalt and bitumen-painted areas should be protected during application. Dekguard Primer should be applied in 1 or more coats until the recommended application rate of 0.4 litres per square metre has been achieved. This is best accomplished by using portable spray equipment of the knapsack-type. Porous surfaces may require the application of Nitoprime DG as an alternative primer, or may require other special treatment. Nitoprime DG should be applied at the same coverage rate as Dekguard Primer but in continuous, multiple coats as necessary. If in doubt about the condition of the substrate, your local Parchem sales office should be consulted. The primer should be allowed to dry for a minimum of 2 hours (at 20°C) before continuing. Under no circumstances should the primer be overcoated with Dekguard Clear until the surface is properly dry. Dekguard Clear may be applied by the use of suitable brushes or rollers. For further information about application techniques, please consult your local Parchem sales office prior to the commencement of work. All primed substrates should be treated with minimum 1 coat of Dekguard Clear. The material should be stirred thoroughly before use and be applied to all areas by the use of suitable brushes or rollers to achieve a uniform coating with a wet film thickness not less than 140 microns. Subsequent coats should be applied exactly as detailed above, again achieving a uniform coating with a wet film thickness not less than 140 microns per coat. Each coat should be allowed to dry for not less than 6 hours at 20°C. Cleaning Renderoc FC should be removed from tools and equipment with clean water immediately after use. Dekguard Primer, Nitoprime DG and Dekguard Clear should be removed from tools and equipment using Solvent 10. Fosroc® Dekguard Clear


32857 Parchem Technical Data Compendium 2015_Crop4emag.pdf
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