Description
RIW Cementfill FC 20kg
RIW Cementfill FC is a premium single-component, polymer-modified cementitious fairing coat designed for repairing concrete imperfections and creating a smooth, waterproof surface prior to the application of waterproofing systems. Incorporating advanced microsilica, polymer and fibre technology, it provides exceptional adhesion, durability and waterproof performance while requiring only the addition of clean water on site.
Ideal for filling blow holes, repairing honeycombed concrete and open-textured masonry, Cementfill FC can also be used as a thin waterproof screed to level both horizontal and vertical surfaces. Its thixotropic formulation allows application to horizontal, vertical and overhead surfaces without slumping, making it an excellent choice for basement waterproofing, retaining walls, concrete repairs and structural waterproofing projects.
Key Benefits
- Single-component polymer-modified cementitious fairing coat
- Advanced microsilica, polymer and fibre technology
- Totally waterproof finish
- Resists up to 100m head of positive and negative water pressure
- Suitable for damp substrates
- Excellent adhesion to concrete and masonry
- Horizontal, vertical and overhead application
- Can be feather edged for seamless repairs
- Enhanced chemical resistance
- Environmentally friendly
- Ready to mix with clean water
- CE Marked to EN 1504-3 (Class R4 Repair Mortar)
Applications
- Filling blow holes
- Repairing honeycombed concrete
- Concrete surface repairs
- Masonry repairs
- Fairing coat before waterproofing
- Thin waterproof screeds
- Basement waterproofing
- Structural waterproofing
- Retaining walls
- Water-retaining structures
- Concrete levelling
- Concrete refurbishment
Technical Information
- Product Type: Polymer-modified cementitious fairing coat
- Colour: Concrete Grey
- Pack Size: 20kg
- Yield: 12 litres
- Coverage: Approximately 4m² at 3mm thickness
- Maximum Application Thickness: 6mm per layer
- Water Addition: 2.2–2.6 litres per 20kg
- Working Life: Approximately 30 minutes at 20°C
- Application Temperature: +5°C to +35°C
- Compressive Strength:
- 1 Day: 23 N/mm²
- 7 Days: 46 N/mm²
- 28 Days: 60 N/mm²
- Flexural Strength (28 Days): 10.5 N/mm²
- Shelf Life: 24 months
- Standard: EN 1504-3 R4 Concrete Repair Mortar
Frequently Asked Questions
What is RIW Cementfill FC used for?
It is designed for filling blow holes, repairing honeycombed concrete and surface defects, and producing a smooth waterproof surface before applying waterproof membranes or coatings.
Can Cementfill FC be applied to damp concrete?
Yes. It is specifically formulated for application onto damp concrete and masonry substrates.
Does Cementfill FC require a primer?
Concrete surfaces generally do not require a primer due to the product's high polymer content. Highly porous substrates should be primed with a compatible primer before application.
How thick can Cementfill FC be applied?
It can be applied up to a maximum thickness of 6mm per layer. Multi-layer applications are possible where required.
How much coverage does one 20kg pack provide?
A 20kg pack provides approximately 4m² of coverage at a 3mm thickness.
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