AAC/CLC blocks are light weight, evenly finished and provide insulation. They have lower compressive strength and absorb much less water in comparison to bricks/CC blocks and are a boon for quick construction.

However, the use of conventional sand cement mortar which is heavier, nullifies the advantages of AAC/CLC blocks. Because of mismatched properties with respect to AAC blocks and because it forms thicker joints, there is always a high probability of crack formation in walls made with AAC blocks and sand cement mortar.

To reap the full benefits of AAC/CLC blocks, they need be used in combination with Perlcon Blockbond, light weight mortar. Uniquely formulated to match the strength and be compatible with AAC/CLC blocks, Blockbond forms a thin and even masonry layer and joint. It also reduces possibility of crack formation.

Additionally, Blockbond provides better heat insulation as its unique composition does not allow creation of a thermal bridge. Perlcon Blockbond is 2.25 times lighter in weight than conventional mortars and therefore offers higher coverage.


Technical Specifications

Dry density: 525 kg/cum (+/- 5%)
Initial setting time: 120 – 150 mins
Final setting time: 300 – 360 mins
Pot life: 3 hrs • Coating thickness: 3-4 mm (avg.)
Coverage*: 12 kg/cum (for AAC blocks of size 600 x 200 x 200 mm)
Shelf life**: 6 months
Ideal for use at 27oC to 30oC

* When applied under controlled environment by skilled applicator and with proper tools
** When stored in proper location with reasonable care. Under packed conditions.

How to Apply

The AAC/CLC blocks should be dry and clean before application. Do not apply Blockbond on a damp/dirty/greasy surface.
Take a clean pot or mixer machine containing potable water with 48% the weight of Blockbond (1 kg Blockbond : 0.48 lit water). Slowly mix and knead to form a homogeneous paste.
Let the mixture stand for 10 minutes. Mix again for perfect blending without adding water.
Apply Blockbond on clean, dry block surface with mason’s trowel to make an even 3-4 mm joint layer.
Correction time for re alignment is upto 10 minutes to ensure perfection.
Blockbond is self-curing and does not require water curing post application.

Comparitive Chart

Picture Gallery



Q. Can Blockbond be used for all types of light weight blocks?

A. Yes, Blockbond is formulated for all types of light weight blocks.

Q. Does the base surface have to be wetted prior to the application?

A. No.

Q. What is the joint thickness required for achieving a good bond?

A. 3-4 mm.

Q. Can it be mixed manually at site?

A. Yes. Care should be taken to ensure uniform consistency.

Q. How much water does it require?

A. 48% by weight of Blockbond (+/- 5%.)

Q. What is the coverage?

A. 16 kg/cum of block masonry (Block size 600 x 200 x 200 mm.)

Q. What is the initial setting time?

A. 120 –150 mins.

Q. What is the final setting time?

A. 300 – 360 mins.

Q. What is the pot life?

A. 180 mins.

Q. What is the shelf life?

A. 6 months. Under ideal storage conditions.

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