CONTENTS CONCRETE REPAIR CORROSION CONTROL GROUTS & ANCHORS PROTECTIVE COATINGS INDUSTRIAL FLOORING SURFACE TREATMENTS JOINT SEALANTS CONCRETE JOINTING JOINT FILLERS WATERPROOFING WATERSTOPS ROOFING TIMBER FLOORING ALPHABETICAL INDEX 153 Fosroc® Dekguard S Properties The values obtained are for the Dekguard S system applied at the minimum recommended application rate. Test method Typical result Volume solids 43% Carbon dioxide diffusion resistance (AS/NZS 4548.5-1999) Equivalent Thickness of air (R), m: - >200 metres (Note: To protect concrete from carbonation, R must be at least 50m - Klopfer criteria) Equivalent Thickness of 30 MPa concrete cover (Sc) >940 mm CO2 Diffusion Coefficient cm²/sec: 7.1x10-08 Water vapour transmission resistance (AS/NZS 4548.5-1999) Vapour Transmission Rate: 21.9g/m²/24hr Equivalent thickness of Air (Sd) m: >1 Vapour Diffusion Coefficient cm²/sec: 2.7x10-05 Reduction in chloride ion penetration (Aston University Diffusion Cell method): >99% Chloride ion diffusion coefficient AS/NZS 4548.5-1999: @ 147 days 1.0 x 10-14m²/sec Freeze/thaw salt scaling (50 cycles) - (ASTM C672-84): Unaffected Good quality concrete (control): Severe scaling Fire testing (BS 476, Pt 7: 1987) - Spread of flame: Class 1 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 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 Nitobond AR curing membrane prior to the application of Dekguard S. Any other curing membrane will need to be removed. 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 the substrate. For further advice consult your local Parchem sales office. It is essential to produce an unbroken coating of Dekguard S. To ensure this is achieved, surfaces containing blow-holes 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 S. Application In order to obtain the protective properties of the Dekguard S system, it is important that the correct rates of application and overcoating times are observed. Dekguard Primer Dekguard S Number of coats: Flood coat 2 Theoretical application rate per coat: 0.4 litres/m² 0.175 litres/m² Theoretical wet film thickness per coat: N/A 175 microns Overcoating time - @ 2°C: 4 hours 12 hours @ 20°C: 2 hours 6 hours @ 30°C: 90 minutes 5 hours Application 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 one or more coats until the recommended application rate of 0.4 litre per square metre has been achieved. This is best accomplished by using portable spray equipment of the knapsack-type. Very porous surfaces may require the application of Nitoprime DG as an alternative primer, or may require other special treatment.
32857 Parchem Technical Data Compendium 2015_Crop4emag.pdf
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