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Technical Dayta Sheet Compedium

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 Properties The values obtained are for the Dekguard O system applied at the minimum recommended application rate. Test Method Typical Result Volume solids 38% Carbon dioxide diffusion resistance (AS/NZS 4548.5-1999) Equivalent Thickness of Air (R),m: > 350 metres (Note: To protect concrete from carbonation, R must be at least 50m - Klopfer criteria) Equivalent thickness of 30 MPa concrete cover (Sd) > 850 mm CO2 Diffusion Resistance cm²/sec: 1.3x10-04 Water vapour transmission resistance (AS/NZS 4548.5-1999) Vapour Transmission Rate: 40.4g/m²/24hr Equivalent Thickness of Air (R), m: < 1 Vapour Diffusion Coefficient cm²/sec: 1.3x10-04 Water Transmission Resistance (AS/NZS 4548.5-1999): 0g/24hr/m²/KPa Chloride ion diffusion coefficient (AS/NZS 4548.5-1999): @218 days 0.1x10-12 m²/ sec Page 2 163 Fosroc® Dekguard O 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 O. 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 O. 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 O. Application In order to obtain the protective properties of the Dekguard O system, it is important that the correct rates of application and overcoating times are observed. Dekguard Primer Dekguard O Number of coats: Flood coat 2 Theoretical application rate per coat: 0.4 litres/m² 0.2 litres/m² Theoretical wet film thickness per coat: N/A 200 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 or painted areas should be protected during application. The 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. 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, the local Parchem sales office should be consulted.


Technical Dayta Sheet Compedium
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