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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 Surface preparation All surfaces to which Perfobase is to be applied must be smooth, free from contaminants and loose material. Rough concrete to be “faired up” before commencing application. Contact your local Parchem branch for suitable fairing products from our extensive range. Priming Index Bitumen Primer should be applied to all the prepared surfaces prior to the application of the membrane and allowed to dry. The primer will take at least one hour to dry at temperatures 25°C and above. At lower temperatures allow additional drying time. Index Bitumen Primer should be applied at the rate of approximately 0.13 litres/m² to the surface to which Perfobase will be applied. The coverage rate for the primer will vary depending on the porosity of the surface being treated. Primer may be applied by brush, roller or spray equipment, coverage must be uniform. Primed areas must be covered with the membrane on the same day. Application Perfobase is laid dry with 30-40mm overlaps. The next layer is then set astride these laps and fully bonded to the Perfobase. When the flame is applied, the sacrificial film on the Perfobase is melted and bitumen from the membrane flows into the perforation and fixes both layers but leaving the Perfobase unbonded. The area of adhesion is approximately 15% of the total surface allowing vapour to disperse and movement of the deck under the waterproofing layer to take place without damage to either the Perfobase or the cap sheet. Note: to achieve good performance it is essential that Perfobase is only applied to smooth, clean, dry surfaces. Cement and concrete surfaces must be primed before application of Perfobase but it is advisable that all surfaces are prepared by priming to achieve the best adhesion. Perfobase should not be used around the perimeter of roofs in windy areas. In these instances a minimum of 2m around the roof edge and either side of a ridge must be fully adhered. The same system should be employed around the base of chimneys, skylights, etc. where 500mm should be fully bonded. INDEX 494 Protection Perfobase is not designed as a stand alone product and must have an additional layer of membrane applied. If the final membrane is to be exposed to UV, a mineral finish is required. Limitations New concrete substrates should be allowed to cure for a minimum of 28 days prior to the installation. Supply Perfobase: Roll width 1 m, length 30 m Product Code: 742020 Index Bitumen Primer: Product Code: 20 litre pail 742105 Coverage Perfobase: 27m² per roll (approx) Index Bitumen Primer: 8 m²/litre Note: no allowance has been made for wastage. Storage Store in cool, dry conditions ie. not exceeding 25°C. Rolls must be stored on end and must not be stored lying down. Index® Perfobase


32857 Parchem Technical Data Compendium 2015_Crop4emag.pdf
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