Ceresit CX5 Rapid Setting Cement Mortar 25 kg – mounting and repair mortar

Ceresit CX5 Rapid Setting Cement Mortar in a 25 kg bag is a premixed, hydraulic-binding mounting and repair mortar formulated for fast hardening on masonry and concrete substrates. The mortar is intended for fixing building elements, filling joints and carrying out quick repairs where rapid strength development and shorter waiting times are required. The product is supplied ready to mix with water and provides a fast transition from application to load-bearing performance.

Advantages

The mortar achieves accelerated setting and early strength gain compared with standard cement mortars, reducing downtime during repair and installation work. It is supplied as a factory-mixed dry powder that only requires water on site, ensuring consistent quality and simple preparation. The product adheres to mineral substrates such as concrete and masonry and allows for rapid continuation of subsequent construction or finishing operations.

Suitable for

• Mounting and securing structural elements (anchors, frames, sills) on concrete and masonry
• Filling cavities and joints that require fast curing
• Small-scale repairs of damaged concrete, mortar layers and masonry
• Emergency repairs where reduced waiting time is essential

When it may not be suitable

The mortar is designed for rapid-setting mounting and repair tasks on mineral substrates; it may not be suitable for applications that require long open time for repositioning or for bonding highly deformable materials where elasticity is required. For continuous external surfaces that demand specific decorative finishes or coloured render, additional finishing products will be necessary after repair.

Key specifications

• Form: premixed dry cementitious mortar (powder)
• Package size: 25 kg bag
• Binding agent: cement-based (hydraulic)
• Application areas: masonry and concrete substrates
• Characteristic: rapid setting with early strength development
• Preparation: requires mixing with water on site
• Typical use temperature: suitable for use within common construction temperature ranges (follow manufacturer guidance)

How to use

Prepare the substrate by removing loose material, dust, oil and frost; the surface should be clean, stable and damp but without free water. Mix the dry mortar with the recommended amount of clean water until a homogeneous, workable consistency is achieved. Apply the mortar with appropriate tools to the prepared area, press or compact as required for fixing or filling, and level the surface. Due to the rapid setting properties, work in manageable quantities and complete tooling and finishing operations promptly. Protect fresh mortar from rapid drying, rain and freezing until it has gained sufficient strength.

What to consider before purchase

• Confirm substrate compatibility: suitable for mineral substrates such as concrete and masonry.
• Plan work in small batches because of fast setting and limited open time.
• Ensure appropriate temperature and weather conditions or provide protection during application.
• Have necessary tools ready for mixing, application and finishing.

Usage recommendations

Follow the manufacturer’s technical instructions for water ratio, application thickness and curing conditions. Use appropriate personal protective equipment, avoid inhalation of dust during mixing and dispose of unused material according to local regulations.