Thin Bed Mortar

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Thin Bed Mortar Specifications


Thin Bed Mortar LM-301is specially formulated for block laying of vertical and horizontal joints for AAC and Clay brick.


  • Practical, ready to use just added water
  • Premixed to ensure consistent quality
  • Good adhesion with high water retention properties
  • Easy to mix with good workability

Technical Data

Color Grey
Binder Portland cement
Filler Lime stone & Graded Sand
Density (wet)   Approx. 1700 kg/m3
Open Time @20 mins
BS EN 1346:2007
0.4 N/mm2
Compressive strength
ASTM C109:2002
8 N/mm2
Tensile Strength ( on AAC block )
BS EN 1348-2007
0.6 N/mm2
ensile Strength ( on concrete Slab)
BS EN 1348-2007
0.8 N/mm2
ASTM C531:2000
0.03 %
Mixing Ratio 8.8 to 9.6 litre of water per 40 kgs bag
Thickness of Application  3-8 mm/coat
Theoretical Coverage Approx. 9.6m2/40 kg/3mm thickness


Surface Preparation

The AAC Block must be clean & free from grease and
loose particles. Dampen the AAC Blocks prior to application if required.


Placed required amount of water in a bucket. Pour the powder while mixing for at least 3 minutes with a mechanical mixer until a smooth & creamy consistency is achieved.


Ensure that joint of AAC Block is fully covered with LeichtMix Thin Bed Mortar using a notched trowel. Remove the excess Thin Bed Mortar upon laying blocks as to ensure correct alignment between Blocks.

Packing & storage

LeichtMix Thin Bed Mortar is supplied in 40 kg bag


Shelf life is 6 month if stored in original seal under cool & dry condition.