K OttO nhl
NHL 3.5 natural hydraulic lime adhesive for exterior insulation boards and skim coat for panels and plaster.
Special light hazelnut adhesive and skim coat with high bond strength, elasticity and impact resistance, compliant with ETAG 004, very low in volatile organic compounds, breathable, based on air lime and NHL 3.5 natural hydraulic lime, pure selected aggregates with a maximum grain size of 0.8 mm and additives, fully recyclable at end of life, suitable for:
- bonding and skim coating natural, breathable insulation boards (cork, rock wool, glass wool, wood fiber, calcium silicate, etc.);
- skim coating new or existing air lime or hydraulic lime plasters, outdoors or indoors;
- skim coating plasterboard, fiber cement and wood fiber panels.
As energy-saving regulations have steadily raised the thermal performance required of building envelopes, ever more efficient and thicker insulation materials have come into use in recent years. As a direct consequence, both the reinforced base coat and the finish on the boards are subjected to higher tensile stresses, caused by the temperature gradient between the board and the outside air.
K OttO nhl is the adhesive and skim coat that keeps pace with the evolution of insulation systems, thanks to its high elasticity, workability, impact resistance, breathability, hygroscopicity and hygrothermal regulation.
Key features:
- Contains no Portland cement;
- Very low VOC content;
- Class A+ under the French VOC-CMR Regulation;
- High bond strength and mechanical performance, without being rigid;
- Adds no water-soluble salts to the masonry;
- Does not react with any sulfates in the masonry, so it is compatible with historic masonry (passes the Anstett test);
- Breathable and hygroscopic, it prevents mold and condensation and regulates indoor humidity;
- Reversible and compatible with historic masonry;
- Fully recyclable and/or disposable as inert waste at end of life.
K OttO nhl is particularly suitable for bonding rock wool, glass wool, cork, wood fiber or calcium silicate insulation boards to brick, porous brick, solid brick, concrete or concrete block walls or existing air lime or hydraulic lime plasters, and for the subsequent skim coat with embedded glass fiber mesh of more than 150 g/m², as a base for any kind of mineral finish (acrylic, siloxane, silicate, lime) or paint.
K OttO nhl is suitable for skim coats with or without reinforcing mesh on new (provided fully cured) or existing plaster. It is suitable for skim coating plasterboard or fiber cement panels used in lightweight construction, after applying RALLK Primer K (or another acrylic sealing primer) evenly with a low-pressure sprayer or a soft natural-bristle brush, in one or more coats until the substrate is saturated, without leaving puddles on the surface, and embedding a glass fiber mesh of suitable weight.
Use on Plywood, OSB type 3 and 4, and marine plywood panels
K OttO nhl is recommended for skim coats on Plywood, OSB type 3 and 4, marine plywood and similar panels, reinforced where needed with 150 g/m² glass fiber mesh, 12-24 hours after applying RALLK Primer K Plus to the panel evenly with a low-pressure sprayer or a soft natural-bristle brush, in one or more coats until the substrate is saturated, without leaving puddles on the surface.
RALLK K OttO nhl declaration of performance
Safety data sheetsRALLK K OttO nhl safety data sheet
Technical data sheetsRALLK K OttO nhl technical data sheet
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