Sika MonoTop®-612 | R4 Class Polymer-Modified Structural Repair Mortar

R4 Class Structural Concrete Repair Mortar

Sika MonoTop®-612 is a one-component, polymer-modified structural repair mortar containing silica fume and fiber reinforcement. Classified as R4 according to EN 1504-3, it has been specifically developed for the repair of load-bearing concrete structures.

Thanks to its low chloride permeability, it provides excellent protection against reinforcement corrosion and ensures long-term durability in demanding environments.

Why Choose Sika MonoTop®-612?

✔ R4 class performance – Provides high compressive strength and adhesion strength
✔ Suitable for structural repairs – Reliable use on columns, beams, walls, and slabs
✔ Silica fume enhanced formulation – Creates a dense and low-permeability structure
✔ Fiber reinforced – Improves crack control and impact resistance
✔ Low chloride permeability – Reduces the risk of reinforcement corrosion
✔ One-component system – Requires only water for mixing and easy application

This product is not a surface smoothing mortar; it is a structural repair solution designed for load-bearing concrete elements.

Applications

Sika MonoTop®-612 is suitable for high-performance structural repair applications, including:

Column and beam repairs
Shear wall and structural wall repairs
Repair of concrete surfaces with exposed reinforcement
Bridges, viaducts, and infrastructure structures
Concrete repairs in marine and industrial environments
Projects requiring high mechanical strength and durability

Technical Classification

Standard: EN 1504-3
Class: R4
Type: Structural repair mortar
Composition: One-component, mixed with water

Sika MonoTop®-612 vs. Sika MonoTop®-620

Sika MonoTop®-620 → R3 Class
Suitable for fine repairs, surface correction, and finishing applications.

Sika MonoTop®-612 → R4 Class
Designed for structural concrete repairs and load-bearing elements.

Choosing the correct repair mortar is critical for long-term performance. For structural repair applications, an R4 class mortar such as Sika MonoTop®-612 should be preferred to ensure durability and safety.