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Factory prepared, cement-free, natural white  dry  powder lime mortar  in accordance with  EN  998-1.  Universal lime based render for manual and machine application for external and internal use. 

Lime based rendering mortar for direct application onto all types of newly erected and existing standard masonry (? 0.14 W/mK) in internal and external areas.
Suitable as a basecoat and plain finish topcoat in a two coat render system or as a basecoat to receive Baumit decorative topcoats, Baumit skimming plasters or tiles.

Sand, lime, hydraulic lime and hydraulic lime and additives to improve workability and adhesion.

A pure lime plaster which fulfils the physical and biological considerations within the built environment.  
Moderate strength development of the lime binder produces a plaster coating free of stresses.  
A healthier alternative to gypsum or cement based products.  
Suitable for application in wet rooms.  
Resistant to impact loading.
One material, from the basement to the roof. 

ca. 1.7 m2/15 mm thickness

ca. 13 kg/m2 /10 mm thickness 

Substrates must be sound, clean, dry, free from frost, dust efflorescence and not water repellent.  
Prepare smooth concrete or very low suction surfaces with a suitable Baumit contact mortar (e.g. Baumit HM 50).  
Prepare mixed masonry substrates and natural stone with a spatterdash coating.  
High suction substrates should be dampened with water using a mist sprayer. Do not saturate aircrete substrates.
Preparation and levelling coatings must be fully cured, well keyed and compatible with the plaster system.  
Refer to Baumit technical support for further advice regarding substrate preparation. 

Mixing: Baumit Klima RK 39 can be mixed with clean water in a tub to a lump free, creamy consistency with an electric hand mixer. Automated continuous horizontal mixers may also be used. For small areas the mixed render can be manually applied. For larger areas the fresh render can be fed into a mortar pump for spray application. 
Alternatively, mortar mixing pumps provide an all-in-one mixing and spraying solution. 
Basecoat render: The render is applied onto the substrate to the required thickness in one or two passes (fresh-in-fresh) depending on the degree of suction from the substrate and ruled off with a straight edge, filling in undulations to produce a flat and even render layer. 
On hardening the surface is consolidated with a wooden/plastic float or scraped with a grid float in tight circular motions in preparation for Baumit decorative topcoat renders. The surface may also be finished with a sponge float for receiving a topcoat of Baumit Kliima RK 39 (3 mm thick) or Baumit Kalkputz Klima Glätt (lime skim finishing plaster). The drying times (1 day/mm thickness) must be observed. 
A maximum render thickness of 20 mm may be applied in a single application. Where necessary, greater thicknesses must be built up in multiple coats of at least 10 mm in thickness. Upon setting the surface of each additional coat is horizontally keyed with a plasterers comb to receive the following coat. Drying times between each coat (1 day/mm thickness) must be observed. 
Topcoat render: Baumit Klima RK 39 is applied on to the basecoat and smoothed out flat with a trowel or spatula to a thickness of 3 mm. Shortly afterwards the surface is lightly rubbed over with a fine sponge float in tight circular motions to produce a fine, plain finish. A paint finish is required for this topcoat render application. 
The Baumit decorative topcoat renders are also suitable for application onto Baumit Klima RK 39. Refer to the relevant Product Data Sheets. 
Reinforcement coat: An additional reinforcement coat of Baumit contact mortar with embedded Baumit StarTex reinforcing mesh to a thickness of 3 - 5 mm applied over the cured Baumit Klima RK 39 basecoat render is recommended in the following circumstances: 
The substrate is comprised of mixed masonry or wood wool boards.
The render system will be exposed to severe or very severe weather conditions. 

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