weber.dur 137

Grain size:
approx. 1.0 mm

Colour:
natural grey

Application thickness:
10 mm - 20 mm

Water demand:
approx. 8 liters / 30 kg

Storage:
The product can be stored for up to 12 months in its original unopened packaging if kept dry and protected from moisture.

Fields of application

weber.dur 137 is used particularly dedicated for highly heat-insulating masonries with low strength, e.g. lightweight perforated bricks (thermal conductivity λ < 0.11 W/mK, bulk density < 700 kg/m³, compressive strength class < 10) or aerated concrete.
Due to its reduced modulus of elasticity and fiber-reinforcement, weber.dur 137 offers a high degree of crack resistance.
For use outdoors as base coat render with all Weber mineral or organic overlay renders (finish top coats).
Also for use indoors as base coat and top coat render with all Weber thin-layer mineral or organic overlay renders. For subordinated requirements, it can also be coated with solvent-free paints for interior use.
Furthermore, as interior and exterior base coat render under ceramic wall tiles and slabs.
For use outdoors and indoors.

Main features

• low dynamic modulus of elasticity
• very low tension when hardening
• high yield
• fiber-reinforced
• largely substrate-independent setting behaviour
• offers the greatest possible protection against crack formation
• for mechanical and manual application
• for use as exterior base coat render on highly heat-insulating masonry
• also as exterior and interior base coat under ceramic tiles
• for use outdoors and indoors, depending on specific use

General notes

• Protect fresh render surfaces from direct sunshine, strong winds or moisture.
• Comply with the national guidelines and/or standards (for ex. DIN 18550); if not issued and if necessary, request technical advice.
• The consumption figures mentioned in this document refer to the minimum layer thickness of the render. Due to specific substrates and application variations the consumption might vary. Exact consumption must be determined on a job site mock-up (trial area).
• Adjacent building parts must be separated from the built-in render system.

Special notes

• weber.dur 137 is suitable for interior use as base coat for ceramic wall tiles and slabs up to a total weight of 25 kg/m² including thin-bed mortar and tiles.
• Exterior use under ceramic wall tiles and slabs: apply the bonding and reinforcing mortar weber.therm 300 or 301 with the woven mesh weber.therm 310 (mesh size 8 x 8 mm) on the whole surface of the levelled render; afterwards lay ceramic coverings.
• Limits of use: weber.dur 137 is not suitable for the hereunder mentioned substrates.
• Mineral building slabs (for ex. Aquapanel Outdoor, Blueclad, Duri/Masterpaneel): apply a fullsurface reinforcement layer (thickness 5 - 7 mm) consisting of the bonding and reinforcing mortar weber.therm 300 or 301 and the woven mesh weber.therm 310 (mesh size 8 x 8 mm) on the levelled render layer.
• Polystyrene formwork blocks: see above; in case of thicker layer > 7 mm use the lightweight underlay render weber.therm 376 (8 - 20 mm).