weber.dur 140 SLK

Grain size:
approx. 1.5 mm

Colour:
natural grey

Application thickness:
15 mm - 30 mm

Water demand:
approx. 8 liters / 20 kg

Storage:
The product can be stored for up to 3 months in its original unopened packaging if kept dry and protected from moisture.

Fields of application

weber.dur 140 SLK is used as accelerated, cost-effective, highly fiber-reinforced, lightweight mineral exterior base coat render (type II) for use on highly heat-insulating masonry with low strength, e.g. lightweight perforated bricks (thermal conductivity λ < 0.11 W/mK, bulk density < 600 kg/m³, compressive strength < 6 N/mm2) or aerated concrete.
Due to its fiber-reinforcement and its low modulus of elasticity weber.dur 140 SLK offers a high crack resistance.
Can be coated with all Weber mineral or organic overlay renders (finish top coats).
Also, as interior and exterior base coat render under ceramic wall tiles and slabs.
For use outdoors and indoors.

Main features

• very low tension when hardening
• excellent workability
• excellent non-sag behaviour
• fiber-reinforced
• optimized setting and scratching properties; hence enabling fast finishing works
• regular and fast-setting behaviour on almost all surfaces, allowing roughening with grid float after only approx. 1 hour
• offers the greatest protection against crack formation
• for mechanical and manual application
• for use as exterior base coat on highly heat-insulating masonry
• also as interior and exterior 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 140 SLK is suitable for interior use as base coat for ceramic wall tiles and slabs with a total weight of 25 kg/m² including thin-bed mortar and tiles/slabs.
• 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 140 SLK is not suitable for the hereunder mentioned substrates.
• Mineral building slabs (for ex. Aquapanel Outdoor, Blueclad, Duri/Masterpaneel): apply a full-surface reinforcing 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).
• If gypsum or gypsum-containing materials were previously machine-applied, clean the render machine, hoses and dry conveyor system thoroughly before using weber.dur 140 SLK.
• Do not leave mortar hoses in the sun.
• Work interruptions during the machine application may not exceed 20 minutes.
• Under favourable weather and hardening conditions, weber.dur 140 SLK can be coated with all Weber mineral thin-layer overlay renders (range weber.star) after a drying time of ½ day per mm of thickness.