CRM-204 LA Repair Concrete is a low-alkaline, shrinkage-reduced, cementitious repair
micro-concrete mortar designed for repairing damaged concrete structures. Suitable for both internal and external applications on vertical, horizontal, and overhead surfaces, CRM-204 LA RC offers a durable solution for restoring concrete elements. It complies with EN 1504-3 Class R4 for structural and non-structural repair, and provides excellent protection against carbonation and chlorides. 

Product Application:

CRM-204 LA RC is ideal for use on suitably prepared concrete surfaces in various
applications:

 • Structural repairs to beams, columns, and floors

• Restoration of bridges, tunnels, car parks, and other infrastructure 

• Filling of voids, cracks, and honeycombing in concrete 

• Repairing spalling concrete due to reinforcement corrosion 

• Smoothing surface imperfections and providing a uniform finish 

• Suitable for repairs by methods 3.1, 3.3, 4.4, 7.1, and 7.2 as set out in EN 1504-10 

Product Use
Preparation: To prepare the repair area, begin by cutting back the edges to a minimum depth of 10 mm to avoid feather-edging and create a clean, square edge for a stronger bond. Break out the entire repair area to a depth of at least 10 mm, ensuring that all loose or damaged concrete is removed. Clean the surface thoroughly, removing dust, debris, and any unsound or contaminated material such as plaster, oil, paint, grease, corrosion deposits, or algae. If breaking out is not necessary, roughen the surface and remove any laitance by light scabbling or abrasive blasting to provide a sound, clean substrate.

Inspect the steel reinforcement in the repair area and remove any corroded steel. Clean
the exposed steel to a bright metal finish using abrasive blasting, ensuring that all rust
and corrosion products are removed. Wash the cleaned steel with clean water to
eliminate any remaining corrosion particles. Once cleaned, prime the exposed steel
thoroughly with an appropriate primer, ensuring complete coverage, and allow it to dry as
specified.

Benefits

• Pre-mixed product only requiring the addition of water
• Pre-mixed on component eliminates inaccuracy of site mixing
• Low Alkali Reactive Particles
• Low permeability to CO2 and chlorides
• High build characteristics
• Chloride free