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Block Mortar (MAX A-21)


It is thin set grey cement based Block Mortar. It can be mixed with water to fix any size AAC blocks, concrete blocks,hollow blocks, fly ash bricks.

Application:- It is specially designed to fix any size blocks on interior floor/wall & exterior floor/wall dry areas. Before application, area needs to be clean properly. 

Substrate:- 

1Cement Plaster 

2. Cement Mortar Beds 

3. Concrete 

4. Concrete Masonry  

5. Brick Masonry 


 Application Method:-

1. Clean the surface to avoid dirt, oil, grease, dust or any other loose particles 

2. Ensure for surface flatness for mortar application with the help of surface leveller. 

    Please ensure surface variations   should not be more than 12 mm.

3. Take clean water 20-25% of mortar by weight & always add mortar into water 

4. Mix the above mixture with the help of drill machine with suitable arrangement 

    to mix the mortar with water for uniform paste formation. 

5. After paste formation put the paste for 2 minutes to make mortar mature.

6. Do not add more water in paste to increase pot life. 

7. Use the flat side of trowel to apply paste on mating parts 

8. Use notched side of trowel (Square notched trowel of 6mm) at 45° to comb the paste on mating parts. 

9. Press the block on substrate & slide it to ensure proper paste filling between both for good initial bonding. 

   Clean this area after application. 

10. Leave the application area for 24 hrs for proper mortar setting



Performance Properties & Test Results Test

Test Properties 
Test Method
Requirement/ Declared by mfg.
Test Result ( Approx/Avg . )
Split Tensile Strength at 28 Days
ASTM C 1660-09 
0.4 N/mm2 (min) 
0.49 N/mm2 
Open TimeN/A
15 minute (min)
20 minute
Adjustment timeN/A
20 minute (min)
25 minute

Features & Benefits 

 1. Polymer modified product 

 2. Good workability 

 3. Single component-Just add water 

 4. For fixing any size block on interior floor /wall & exterior floor/wall areas 

 5. Extremely good bonding strength 

 6. No curing required 

 7. Economical & easy to use

Product Details 

 Packaging:-30 kg Bag

 Colour:-Grey 

 Coverage: Approx. 1 m3 per 30 kg bag with "6mmx6mm" square notched trowel at 45° application for a bed thickness of 3mm.  

 Shelf Life:-Best before 12 months from date of manufacturing in unopened condition & store in dry place

 Product Conformity:-ASTM C1660-09