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OPTIMIX RM725 & RM740 Repair Mortar Accredited with PCCS-RM

OPTIMIX is happy to announce that our RM725 and RM740 repair mortars have successfully attained PCCS-RM certification issued by HKCI.


The Hong Kong Housing Authority has rigorous requirements for their building projects, only repair mortar accredited with PCCS-RM would be accepted in HKHA repair works.


OPTIMIX RM725 Repair Mortar (HKHA Class 25) & RM740 Repair Mortar (HKHA Class 40) are high quality polymer modified and shrinkage-compensated mortars optimized for structural patch-repair purposes. With high early strength and other critical abilities as a repair mortar, these products are suitable for repairing spalled concrete, general concrete defects like voids and honeycombing and providing reinforcement to the embedded steel to reinstate defective concrete. Overhead and vertical applications can be performed without the use of a formwork.


➤ The mortar can be applied up to 50mm thick as a single layer for vertical applications.

➤ The mortar can be applied up to 40mm thick as a single layer for overhead applications.

Application Procedures:

1. Break out the repair area and saw cut the perimeter at right angle to the face of the concrete to a depth of at least 10mm to avoid feather edges. Clean the exposed concrete surface and remove dust and loose particles. Expose and remove all loose rust from corroded reinforcement. 


2. Apply OPTIMIX PE Polymer Emulsion cement slurry primer (PE : Cement = 1 : 1.5) to the cleaned reinforcement and allow to dry in forming protective film. 


3. A thin layer of OPTIMIX PE Polymer Emulsion cement slurry primer should be brushed onto the concrete surface. Repair mortar should be applied onto the primed area when the primer becomes tacky. Repair mortar should be placed and compacted onto the primed substrate by trowel or gloved hand. 

*Application procedures is for general reference only, refer to method statement issued by OPTIMIX for site applications.


Application Tutorial Videos: (for reference only)

1. OPTIMIX RM725 Repair Mortar (HKHA Class 25)


2. OPTIMIX RM740 Repair Mortar (HKHA Class 40)