Fiber-reinforced cementitious matrix (FRCM), also called textile-reinforced mortar (TRM), is a thin structural layer which combines specially designed mortar with carbon or glass fiber grid reinforcement. It is an economical solution exceptionally suitable for repair and strengthening of historical structures.

FRCM Systems Have Many Advantages

Men installing FRCM with mortar on ceiling
  • Quick and easy installation requires less preparation than traditional FRP strengthening and also ensures minimal downtime
  • Cost-effective solution compared to traditional concrete strengthening
  • Does not add significant weight or mass to the structure, which makes it ideal for historical buildings and structures
  • Outstanding performance for strengthening irregularly-shaped structures and substrates

Sika’s FRCM Systems Come in Two Types

1. Carbon Fiber Grid Reinforcement
Carbon Grid Reinforcement with Sika CarboDur Grid

A patented carbon-fiber grid embedded in a specially designed repair mortar for the reinforcement of concrete or masonry structures.


  • Reinforcement of structures in damp environment and up to 80 °C (176 °F)
  • Enhancement of tensile strength in two directions (bidirectional)
  • Easy and fast to handle and to apply, less waiting time after concrete repair
  • No UV protection required
  • Better behavior in case of fire
Download a brochure to learn more
Watch a video about installation
Sika® CarboDur® Grid C - Patented Carbon Grid Reinforcement System Installation

Watch the video to see step-by-step instructions and key recommendations for applying Sika's carbon fiber grid reinforcement system.

  1. Prepare the substrate
  2. Prepare the reinforcement
  3. Prepare the mortar
  4. Apply adhesive to substrate
  5. Install and embed pre-cut grid
  6. Finish the reinforcement composite and smooth the surface
2. AR Glass Fiber Grid Reinforcement
Illustration of trowel application of mortar on carbon grid reinforcement FRCM on masonry wall

Alkali-resistant glass fiber grid embedded in a specially designed repair mortar for the reinforcement of masonry structures.


  • Suitable for reinforcement of all types of solid masonry (bricks, tuff, natural stones, etc.)
  • Suitable for high service temperatures
  • Moisture-tolerant
  • Based on structural design guideline CNR DT-215
  • Tested according to Italian guideline D.CS LL.PP. n.1/19

See How Sika FRCM Systems Are Applied at the Uffizi Museum in Florence, Italy

Key Brands

Sika® CarboDur®
Sika MonoTop®

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