Baumit RK70 N is a lime based internal base coat finish plaster on to wood fibre boards. Also used as internal bonding coat (adhesive) and external fine finish.
Baumit RK70 N is a pure lime plaster which fulfils the physical and biological considerations within the built environment. Easy to use contact mortar with a range of uses. Once cured, the product has good bonding strength, is water vapour permeable and resistant to weathering, water ingress and frost penetration.
For use in internal and external areas.
|Bag size||25 kg|
|Coverage||1.4kg per m² per mm|
|Coverage per bag||8.9m² @ 2mm|
Mixing: Baumit MultiFine RK 70 N can be mixed with clean water in a tub to a lump free, creamy consistency with an electric hand mixer. Material which has started setting must not be remixed with water. Mixing with other products (e.g. anti-frost 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.
Topcoat finish: Baumit MultiFine RK 70 N as a fine topcoat finish plaster is applied onto the basecoat and smoothed out flat with a trowel or spatula to a min. thickness of 2 mm. Upon setting the surface can be lightly rubbed over with a fine sponge float in tight circular motions to produce a fine, plain finish. A particularly smooth finish can be achieved by applying another thin coat of the contact mortar the following day. Other finishing techniques such as freestyle texturing, soft brushing etc. are also possible. A paint finish may be applied if required.
Preparation of render and plaster substrates: Baumit Klima RK 70 N is applied to a min. thickness of 5 mm (with embedded Baumit
StarTex reinforcing mesh where necessary) and the surface keyed with a stiff brush or plasterer comb. Allow to dry for 1-2 days.
Substrate must be sound, clean, dry, free from frost, dust and efflorescence.
Please see product data sheet for subsurface pre-treatment.
Store in dry conditions and protected on pallets for up to 6 months.