Concrete Cover Blocks

Concrete Cover Blocks (also known as concrete slab spacers or rebar spacers) are precast, high-density cementitious accessories used in Reinforced Cement Concrete (RCC) construction. Placed between the reinforcement rebar mesh and the shuttering (formwork), they maintain the exact "clear cover" specified by structural engineers.

By locking steel reinforcement bars at the correct depth, cover blocks ensure the rebar is fully encased in concrete. This protects the steel from environmental moisture, prevents corrosion, meets fire resistance standards, and maintains structural load capacity.

Key Features & Benefits

• Consistent Clear Cover: Maintains the exact structural distance between rebar and formwork during heavy foot traffic, concrete pouring, and needle vibration.
• Corrosion Protection: Provides a dense concrete barrier that shields internal steel rebars from moisture ingress, carbonation, chlorides, and groundwater salts.
• Thermal Compatibility: Manufactured from high-grade cementitious mortar with the same thermal expansion coefficient as the surrounding poured concrete, preventing hairline boundary cracks.
• Superior Load Capacity: Engineered with high compressive strength () to resist crushing under heavy reinforcement cages and labor movement.
• Fire Safety Compliance: Provides the required concrete encasement thickness to protect structural steel from softening during high-temperature fire emergencies.
• Integrated Binding Wires: Available with embedded GI (galvanized iron) tying wires to securely lock blocks onto vertical columns and beam sides without slipping.