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Following preparation of substrates (as previously outlined) Murobond Cement paint is applied as follows: Surfaces that have not been primed or sealed should be thoroughly dampened with water with no glistening wet patches or dry areas apparent immediately before application. (Extremely important on exterior surfaces in hot weather.) Surfaces that have been primed or sealed do not require dampening prior to application. First Finish Coat The Murobond powder is mixed with water or WSC Solution in the ratio 3 parts powder to 2 parts water, by volume, to form a paint that is similar in consistency to cream. Using WSC WSC is typically used in the final coat of Murobond only, however its use in both coats is beneficial in exposed situations or for single skin construction. The mixed Murobond paint is applied by brush in a random pattern at a rate of approximately 6 sq.m per kilogram. Allow a minimum of 24 hours to dry. The thickness of the applied film is critical to cure and performance. The coat should be applied as thickly as possible while maintaining flow. Thin application will show poor cure (powdering) and excessive weathering. To aid the setting of Murobond it is important to lightly mist spray the painted surface with water three to four hours after the application of each coat. This is particularly important when hot, dry or windy conditions prevail or when overcoating previously painted, primed or sealed surfaces. Additional mist spraying will further accelerate setting and is advised. Mist spraying internally is not necessary. Second Finish Coat The surface should be dampened immediately prior to application. The Murobond powder is mixed with WSC Solution or water in the ratio 3 parts powder to 2 parts water to form a paint that is similar in consistency to cream. Using WSC W.S.C. is supplied in a concentrated form which is diluted 1 part WSC to 4 parts water prior to mixing with Murobond powder. This 1:4 solution is then used in place of water when mixing Murobond. WSC is typically used in the final coat of Murobond only, however its use in both coats is beneficial in extreme situations or for single skin construction. The mixed Murobond paint is applied in the same manner as the first coat. AFTER APPLICATION OF MUROBOND GENERAL PRECAUTIONS Wet/dry lapping will show as a distinct mark, therefore care should be taken to maintain a wet edge across each surface, joining only at natural divisions such as corners. Re-touching of Murobond will show as a distinct patch and unless a consistent patched effect is required, should be avoided. It is recommended that large areas be divided by false expansion joints to reduce the working area to an area easily manageable by a contractor (generally about 3m high by 5-8m long). Expansion/control joints may be sealed or filled after the application of Murobond with care being taken to mask the painted surface against the sealing compound. If the joints are sealed prior to painting, Murobond should not be applied over these joints. Colour & Tinting It is the responsibility of the contractor to ensure colour consistency. It is recommended that sufficient material to complete the project be ordered where possible to eliminate possible colour variation. Where this is not practicable, sufficient material to complete an elevation should be ordered with any excess used as the first coat on the subsequent elevation. Temperature Murobond should not be applied where surface or air temperature is below 8°C or above 35°C. Murobond Sealer should not be applied where surface or air temperature is below 10°C. Murobond can be unusually affected by "shock curing" this is where sudden cold wet weather is experienced during early curing and will show as excessive white bloom and/or streaking. To reduce this risk check weather reports, ensure thick film and mist spraying. Initial Protection Adequate protection should be provided against rain and sub-zero temperatures for a period of at least 48 hours after application. Protection against mechanical abrasion should be provided for at least seven days after application. Packaging Murobond Cement Paint: 1, 4, 15 kilo |