Concrete Mortar Corona C25 25 kg bag, ready-mix cementitious concrete mortar

Corona ZAPRAWA BETONOWA C25 is a ready-mix cementitious concrete mortar supplied in a 25 kg bag and formulated to achieve C25 compressive strength. Designed for general concrete tasks on construction sites, the product provides a uniform mix and predictable performance for foundations, floor screeds, castings and repair works where a defined strength class is required.

Advantages

The mortar offers consistent compressive strength corresponding to C25 class when mixed and cured according to instructions. Its ready-mix formulation reduces on-site batching variability and saves time compared with preparing separate cement, sand and aggregate quantities. Packaged in 25 kg bags, the product is easy to transport, store and dose for small- and medium-scale concrete works. The blend is suitable for both forming structural fills and non-structural levelling where a cementitious concrete is specified.

Suitable for

• Concrete foundations and footing repairs
• Internal and external floor screeds and toppings
• Small castings, steps, thresholds and precast elements
• Patch repairs and reinstatement of concrete surfaces

Key specifications

• Formulation: ready-mix cementitious concrete mortar
• Bag size: 25 kg
• Target compressive strength class: C25
• Application: site mixing for general-purpose concrete works
• Workability: designed for standard mixing with water to achieve required consistency

How to use

Mix the 25 kg bag with the recommended amount of water until a homogeneous, lump-free consistency is achieved; follow water dosing guidance provided on the bag for target workability and strength. Apply the mixed mortar into prepared formwork or onto prepared substrates, compacting and levelling as required. Maintain curing conditions appropriate for cementitious materials to reach the C25 strength class, protecting the placed mortar from rapid drying and extreme temperatures during the initial curing period.

Usage recommendations

Use clean mixing equipment and clean water; prepare substrate surfaces by removing dust, loose material and contaminants. For structural applications consult applicable codes and ensure required reinforcement, cover and compaction are provided. Adjust water content only within recommended limits to avoid reducing final strength.