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Cemairin Block M®

Admixture for masonry mortar (Formerly known as Hyperplast Block M)

Cemairin Block M is a liquid mortar admixture specially designed to provide an integral water repellent and bond enhancing admixture for masonry mortar.

Cemairin Block M improves the workability of the fresh mortar mix and significantly reduces the amount of water absorbed by the hardened masonry mortar.

Cemairin Block M_TDS_1.pdf
Cemairin Block M_SDS.pdf
  • Enhances the bond between the mortar and concrete masonry units.
  • Produces a water repellent mortar throughout the depth of the mortar joint.
  • Improves workability.
  • Minimizes efflorescence at the mortar joint.
  • Chloride-free.

Cemairin Block M is used to provide moisture control for the mortar used in masonry structures. The product is used in conjunction with Cemairin Block R range of CMU admixtures to provide a system of water repelling CMU and mortar offering long lasting resistance to water penetration.

Cemairin Block M is available in 5 gal (19 litre) containers as well as 275 gal (1,041 litre) IBC totes. Bulk supply in tanker trucks is also available upon request.

Cemairin Block M has a minimum shelf life of 12 months from date of manufacture if stored at temperatures between35 ˚F and 122˚F (2°C and 50°C).

The guidance dosage of Cemairin Block M is 14 - 26 oz/3 ft3 (5 - 9 L/ m3) of mortar. This rate is achieved by adding approximately 0.26 gal (1 L) of Cemairin Block M admixture per bag of Portland cement in cement/lime mortars or 0.13 gal (0.5 L) per bag of masonry or mortar cement.

Representative trials should be first conducted to determine the optimum dosage of Cemairin Block M to meet the performance requirements by using the materials and conditions in actual use. When pigments are used to provide a specific color tone, trial batches are strongly recommended to ensure the desired color is reached.