Description
Concrete Fairing Coat & Surface Levelling Mortar
Fosroc Renderoc FC is a single-component polymer modified cementitious fairing coat designed to produce a smooth, fair-faced finish on concrete and masonry surfaces prior to the application of protective or decorative coatings. Ideal for filling surface imperfections, honeycombing and minor voids up to 3mm deep, it delivers excellent adhesion, low permeability and long-term durability.
Specifically formulated for vertical and overhead applications, Renderoc FC provides a high-quality finish while protecting concrete against water ingress, carbonation and chloride attack. It is fully compatible with other Renderoc repair mortars and Dekguard protective coatings, making it an ideal finishing layer for concrete repair systems.
Key Features & Benefits
- BS EN 1504-3 Class R2 compliant
- Polymer modified fairing coat
- Smooth fair-faced finish
- Fills imperfections up to 3mm deep
- Excellent adhesion to concrete and masonry
- Low permeability to water and chlorides
- Carbonation resistant
- Suitable for vertical and overhead applications
- One component, just add water
- No independent primer required
- Easy hand application
- Compatible with Renderoc repair mortars
- Compatible with Dekguard coatings
- Chloride free formulation
- Non-combustible Class A2 s1 d0
Suitable Applications
- Concrete fairing
- Surface levelling
- Honeycomb repairs
- Void filling
- Concrete finishing
- Masonry finishing
- Bridge refurbishment
- Car park repairs
- Concrete repair systems
- Structural refurbishment
- Protective coating preparation
- Decorative coating preparation
- Vertical concrete repairs
- Overhead concrete repairs
Technical Information
- Product Type: Polymer modified cementitious fairing coat
- Classification: EN 1504-3 Class R2
- Colour: Concrete Grey
- Bag Size: 25kg
- Application Thickness: 0–3mm
- Compressive Strength: ≥15 MPa at 28 days
- Bond Strength: ≥0.8 MPa
- Chloride Ion Content: <0.05%
- Initial Set: 50–120 minutes
- Fresh Wet Density: 1600–1800 kg/m³
- Coverage: Approx. 15 litres per 25kg bag
- Coverage Rate: Approx. 5m² at 3mm thickness
- Fire Rating: Class A2 s1 d0 Non-Combustible
Standards & Certifications
- BS EN 1504-3 Class R2
- Repair Method 3.1
- EN 13501-1 Class A2 s1 d0
- CE Marked Product
Frequently Asked Questions
What is Renderoc FC used for?
Renderoc FC is used to create a smooth fair-faced finish on concrete and masonry surfaces before applying protective or decorative coatings.
How thick can Renderoc FC be applied?
It can be applied from feather edge up to a maximum thickness of 3mm.
Does Renderoc FC require a primer?
No. No independent priming system is required when applied to properly prepared substrates.
Can it be used overhead?
Yes. Renderoc FC is specifically designed for both vertical and overhead applications.
What coverage does a 25kg bag provide?
One 25kg bag yields approximately 15 litres and covers around 5m² at 3mm thickness.
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