Natural-white, fibre-reinforced multi-purpose bonding mortar.
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Baumit MC55 W external render is a versatile base coat render used for application on to wood fibre boards.
Overview:
Natural-white, fibre-reinfoced multi-purpose bonding mortar. Suitable as a remediating render over existing stable, mineral and synthetic-resin based plasters, renders and paintwork. Also suitable as a keying coat in concrfete and insulating boards or as a finish render on concrete formwork and fair faced masonry.
Application:
Baumit MultiContact MC 55 W can be mixed with clean water in a tub to a lump free, smooth consistency with an electric hand mixer. Material which has started setting must not be remixed with water. Mixing with other products (e.g. anti-freeze agents or accelerating
agents) is not permitted.
Automated continuous horizontal mixers may also be used. For small areas the contact mortar can be manually applied. For larger
areas the freshly mixed mortar can be fed into a mortar pump for spray application. Alternatively, a mortar mixing pump will provide
an all in one mixing and spraying solution.
Preparation of concrete, render and plaster substrates and remediation: Baumit MultiContact MC 55 W is applied to a thickness of 3 – 5 mm (with embedded Baumit StarTex reinforcing mesh where necessary) and the surface keyed with a brush or plasterer comb.
Consumption:
Approximately 4/5 kg/m2 as adhesive.
Approximately 4.5/5.5 kg/m2 as basecoat.
Subsurface:
Substrates must be sound, clean, dry, free from frost, dust and efflorescence.
Further Notes:
The air, material and background temperature must be above +5° C during application and curing.
Protect the facade from direct sunlight, rain and strong winds (i.e. with scaffold nets).
In hot and/or windy weather dampen the finished work at regular intervals with a water mist sprayer to aid hydration. High air humidity and low temperatures can prolong drying times considerably. Observe the minimum standing time of 1 mm render thickness per day before applying further coatings and finishes.
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